It's not worth changing the barrel extension on an already finished barrel, getting the new barrel extension to line up correctly with the gas port will probably cost more in gunsmithing/machining fees than buying a new barrel. Proper maintenance and lubrication. Oh well, as I tell my lovely and understanding bride, guns are relatively free. it's the ammo and training that cost real money. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. again, Thanks. M4 ramps help in feeding in for carbine in full auto. No feed ramps. JavaScript is disabled. Single Action and Double Action Which One Is Better For You? You need to match up barrels to receivers for optimum performance. So, an M4 feed ramp includes the barrel extension and the upper. Barrel is medium SPR profiled barrel, threaded with a 1/2-28 thread for the AE brakes and collar. You absolutely do not want it the other way around however. Only took a few minutes. There's no downside to having M4 feedramps on your carbine, but they are not as necessary without full auto and when using followers that will not tilt (or in a 20 AR15). Konza Defender M-LOK 5.56 16" Rifle 1x7 FEATURES: 16" 4150 Nitride 1x7 5.56 Barrel T-Marked Upper with M4 Feed Ramps Steel Micro Gas Block, and Carbine Length Gas Tube 15" 7075 T6 Aluminum Free Float M-LOK Hand Guard A2 Muzzle Break BCG is an M16 Style Nitride QPQ Finish Charging Handle Mil-Spec 6 Position Mil-Spec Diameter Stock Shorter length equates to much higher pressure in the upper receiver. Absolutely nothing to do with casing diameter, or whatever other weird sht you guys imagine. For the purposes of this chapter, we'll call the new one the M4, and the old one the AR. Went back to the sellers website and found I was not the only one with problems. Dec 17, 2020. Olympic Arms Upper receiver with rear sight assembly and forward assist and dust cover has M4 feed ramps $260 View attachment 1016575 View attachment 1016576 You also repeated yourself. I recommend putting any AR-platform firearm together with a matched M4 barrel extension and upper receiver set, just because you can. It may not display this or other websites correctly. Ballistic Performance of Federal Punch .22 LR Ammunition with the Heritage Barkeep #1063. They are also 1/7 twist, 4150 steel, chrome lined, and button rifled like the real deal! The reason I decided to write about this topic at all was because there are some mil-spec features advertised on aftermarket parts that arent even really mil-spec. Sent back again. Everything that you have on your side to make any weapons more reliable and work when it absolutely needs to is a plus. To measure just where the round makes impact on the feed ramps, I did not use any sort of micrometer to measure. It is milled out of 6061 T6. from my service in the 70s to my personal weapons, all of my ARs are early 1970 slab sided Colt SP1s. SKU: BCM-URG-M4-16 Features: M4 Feed Ramp Barrel Extension Caliber: 5.56 NATO Barrel Length: 16in Barrel Style: Standard Handguard: None BCM M4 Handguards (Double Heat Shield) - Black + $15.00 PKMR (Polymer KeyMod Rail) Carbine Length - Black + $24.95 PKMR (Polymer KeyMod Rail) Carbine Length - Flat Dark Earth + $24.95 Stock Status: Out of stock You can post now and register later. Product Details Douglas 18" Flat Dark Earth Cerakoted 416 stainless steel barrel with 1-7 twist and M4 feed ramps. Seems counter intuitive to recommend an M4 cut upper, especially if the barrel Im looking at has the rifle feed ramp (not M4 cut). However, I have seen more than a few basement gunsmith hackjobs using a dremel, some Jack Daniels/liquid courage, and an unsteady hand that have made a total, unrepairable mess of the job. Bear Creek Arsenal Barrels - 6.5 Grendel Type 2 Barrel This Gorilla Machining AR-15 16" heavy Black Nitride 6.5 Grendel barrel has a Carbine length gas system with a 1:8 twist. 16" Pre-Ban M4 Profile Barrel Assembly CARBINE Gas System About Upper assembly comes completely head spaced and test fired. Backing up a ton: The ramps on regular barrel extension are cut just to the edges, while the M4 feed ramps have deeper cuts in the M4-spec upper receiver. Some suggest taking a grinder to the extension area. Polishing the edges of the chamber mouth to remove the edges of that chamfer will. It has 2 ramps cut into the receiver to help the rounds feed into the chamber. I'd get jams from bullets hitting the back of the upper so I took a small round file and made the M4 ramps in the upper. Its easier to add feed ramps to the receiver not so easy to add them to the barrel extension. Theres a bit more to it than just polishing. I'd rather not spent the money to get it cut to the specific length I need, FSB installed, etc just to have it immediately not work and have to sort out then or start from square one with a new barrel. I didn't forsee that we'd ever see the day when replacement parts would be so hard to get. For instance I was looking at the BCM upper receiver, and it said it had M4 feed ramps machined into the upper. [ARCHIVED THREAD] - M4 feed ramp barrel in a non M4 ramp upper. The best case is to have both an upper and barrel that have the feed ramps. what I fear the most is having an m4 ramp upper and then getting a barrel with a rifle ramp. In general, all you need to understand is that the M4 feed ramps include the barrel extension and upper receiver. #2. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. All NFA rules apply. They offer a lower, more extensive, and smoother entry for any round of ammo, whether its necessary or not. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. My factory JP CTR-02 has the appearance of the bottom right picture in the post above, M4 barrel extension in a rifle receiver, and there is not a mark on the aluminum under the barrel extension. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. I like all my guns to be reliable. Our 6.5 Grendel Black Nitride rifle barrels are made from the finest 4150 Chrome Moly Vanadium and precisely rifled for high accuracy at a great price. 410 stainless is also harder and more corrosion resistant than conventional 416 stainless found in other commercially available precision barrels. I'm a machinist in the aerospace industry and lucky enough to have unrestricted access to a really nice machine shop so the modification from rifle to M4 feed ramps is no sweat, I've done it once before a few years back with a .250" carbide cutter in the mill for a friend and it came out looking indistinguishable from a true M4 extension. These units actually feature the NON-F-Marked (correct) front sight base. If your mag catch is at Spec height, you should not have a problem with an M4 cut barrel in a rifle receiver. Feed ramps being m4 or. $101.95. The good idea is that the round, presented at a lower plane, will contact other lower feed ramps and go right on in. Being a Newbie AR owner ((Ive been an avid gun owner for nearly 50 years), I appreciate the information and visual aids that Im sure will be a big help in enjoying and using this gun platform. After two months of back and forth, cleaned up the feed ramps. Editors Note: This article was originally published in January of 2019. You can modify the upper, but bear in mind that the un-anodized aluminum surface will be very soft and prone to wear if your particular bullet hits it frequently. For someone who is new at trying to understand feed ramps it helps to read a couple different explanations. If you consider this article useful, share it with anyone in need! I will attest that a rifle upper and a barrel with the M4 feedramps works just fine. i have an extra brand new M4 barrel extension ramp to replace a rifle ramp. You CAN modify a rifle/A2 barrel extension to an M4 style extension, but it isn't always the best way to go unless you just have to do it. The Shooter's Log, is to provide informationnot opinionsto our customers and the shooting community. Powered by Invision Community, M4-style barrel extension with Rifle-type upper. It is removeable with a special wrench and a barrel clamp/vise. Instead, I just loaded up each mag with two rounds, and pushed the rounds forward by hand until the tip of . They guide the bullet up and into the chamber. Any use of this content without express written consent is prohibited. I've seen that pic, it is a good reference. Brevity matters. Here's some info from Randall Rauch aka www.ar15barrels.com, if your barrel extension has M4 ramps you should have an upper receiver also with the ramps. Remember less is more, little by little. i have the rifle barrel. http://www.ar15fornoobs.com/wp-content/uploads/feedramps.jpg. Jams and misfires. . There are several, but Steve and the guys at ADCO in OH are one such option (they use the Dremel method, but they do it right as I have seen several first-hand examples of their work and its performance after the fact). FN AR15 barrels are hammer forged using the same proprietary high-grade Chrome Moly Vanadium steel used in FN's venerable machinegun barrels produced to handle the punishment of . If you ever have an issue, then look at getting a correct barrel for the upper. I put together a second AR9 that is having a feeding issue, even if using similar parts as the first one. So, an M4 feed ramp includes the barrel extension and the upper. Site towers are not "F" marked SPECS: Length- 14.5". Seems like it should work to me, but be a real challenge to keep clean and be damned ugly to boot. JavaScript is disabled. Recommend using a gunsmith this route too if you are not comfortable. Is one better than the other? Installing a Luth-AR Rifle Buffer Tube and an A2 Stock #1041. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. If you want precision, dont look to the mil-spec gun, look to the one that is popular in 3-gun competitions, at Thunder Ranch, etc. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. Personally, I would sell the rifle upper and buy an M4 upper - the cost will be small and you will end up with a more satisfactory end product. The trust part is accepting claims of USGI-spec parts actually being done to not only blueprint dimensions, but also made from the correct materials treated to the same processes. Regular feed ramps are cuts into the barrel extension only, which allows guiding the round into the chamber during loading, making them a fundamental feature of many breech-loading firearm designs. An upper without feed ramps can be used with a barrel that has them as the majority of the ramp is on the barrel extension. The ramps are in the barrel extension. Now, theres nothing wrong at all with a little polish on any and all feed ramps, which can not only be done fairly easily, it can be successfully done by most at home. It is a tightly machined and polished piece of metal which guides a cartridge from the top of the magazine into the firing chamber of the barrel. That puts the cartridge in a position where the extended feed ramp improves the breech-loading design. And that the M4s and M4A1s are issued M855 which has a slight difference in bullet shape vs. the older 55gr M193 BALL. Go back to writing school. If a barrel comes with the feed ramps could I take them off? . We're a little past that point as I already own both the barrel and receiver, both of which cant easily be replaced or swapped for a decent price. What is an m4 feed ramp? Shopping with us is absolutely safe - you never have to worry about credit card safety when shopping here Share your latest AR build or photos from the range with #RangeDayFriday for a chance to win a new firearm! Description. What is the difference between Modern, Performance, and Premium Series Barrels? Caught a deal on a matched barrel and bolt. Reddit and its partners use cookies and similar technologies to provide you with a better experience. Just put it in and shoot it. I have done the same, protect the Barrel extension with a layer of electrical tape and carefully file or Dremel the ramps into the aluminum receiver. I've seen several places say you just need a 1/8" chainsaw sharpening bit and a Dremel to fix it. I wont buy a barrel that isnt a wylde 223 556 but Im only now noticing. 3. Anodized red parts. All Rights Reserved. Again, youll find plenty of videos on spooling up hand grinders to remedy feed ramp and ejection port issues with these larger cartridges, but I strongly suggest going factory-done aftermarket. When you need to nail something you use a hammer not a wrench. How long your barrel "lasts" depends on what your accuracy threshold is before you decide it is too bad to keep using. Factory said its fine . M4 extension with .350 M4 style feed ramps 11 Degree Target Crown Threaded Muzzle 5/8"x24 TPI Weight: 26.5 ounces M4 Feed ramps on barrel extensions are a solid example. No need to alter the upper. The only one I found is LaRue's upper, but it won't work with the hand guard I'm using (Geissele MKIII). if you are OK with 3MOA, you might go 20,000 rounds! M4 barrel to non M4 receiver is fine, but not the other way around. M4A1s run at 950 rounds per minute in full auto and even 950+ rounds per minute as the gas port erodes open bigger and bigger with wear and allows them to run even faster and much more violent. Whether they materialize or not depends on the direction of the mismatch. I replaced the M4 feed ramp barrel with a monolithic feed ramp barrel and no more problems. If it's happening regularly, check the magazines you are using for serviceability. M4 feed ramps are not an original design, they were designed for the M4 In fact, the . The Fora platform includes forum software by XenForo. I wouldn't be concerned at all with any wear after modifying an upper receiver. FFL Fax: 866-721-8691. All this basically means is that the ramps continue from the barrel extension down through the upper receiver tonthe magazine. Having been in military supply, I know that what the mil-spec means: it gets the minimum job done for thousands (millions) of parts/systems. You will receive an email every Friday morning featuring the latest chatter from the hottest topics, breaking news surrounding legislation, as well as exclusive deals only available to ARFCOM email subscribers. Mil-spec is good for the masses, and if you want the job done it is a great start. 's blog. Its a miracle! I would only add the feed ramps to the receiver if I had feeding issues, which you should not have. Any body need a anchor for a very small boat? If your magazines are set up correctly, and the feed lip edges polished smooth, each round fed from the magazine will go directly into the chamber. You can run M4 cut barrels with rifle receivers, but not the other way around as it will create at catch that can hang up the bullets. upper recievers and barrels are hard to comeby. When carrying out feed ramp polishing, it is crucial to prioritize the frame's angles, which is a critical part of the feed ramp. I don't have much to add re: feed ramps, but. You have the option of barrel type, thread, fluting, finish type and to add a match bolt. Create an account to follow your favorite communities and start taking part in conversations. I think your mistaking that with adding ramps to the receiver. Inadequate knowledge about these feed ramps can lead to lots of problems with barrels because they are essential parts to guide the bullet up and into the chamber. Your discussions, feedback and comments are welcome here as long as they are relevant and insightful. I'm a machinist in the aerospace industry and lucky enough to have. By Home Firearms Figuring Out Feed Ramps. The M4, and the CAR-15, before it have had similar problems like the ones you mentioned. We want you, our readers, to be able to make informed decisions. While I've got everything apart, I'm thinking I just want to put an M4 barrel extension on. I recently built an AR9 (Glock Mags) that has been running flawlessly for about 3-400rds. The barrels also had to be modified. We reserve the right to edit as appropriate, delete profane, harassing, abusive and spam comments or posts, and block repeat offenders. Its not a big deal but still an important thing to remember and understand. Thats true overall and good to keep in mind. You can put a M4 barrel and non-M4 receiver together, but you can't mismatch them the other way. That is what I tell people when they try to convince me that they need a stainless barrel instead of chrome-moly. Costs about $40-50 to have the feed ramps reprofiled from what I can gather. Questions on how to install your new BA barrel? AR9 - Help diagnosing feeding issue. That's an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. I built the upper using a Mega upper with a Compass Lake 18" barrel. Load a magazine with two or three rounds, lock the bolt group back on your rifle or carbine and insert the magazine. Read Now. The M-16/M4 are great weapons. A4 Complete Upper Receiver. I suggest you get a rifle receiver. I checked what I have now. This 20" BCM barrel is machined from SS410 stainless steel. I picked up a side charging upper from Sundevil last year. The closest brand new barrel you are likely to find is the Windham Weaponry 20 inch 1/7 twist chrome lined barrel. Guess what? We have four combinations here: Moreover, telling someone that an extension can be modified, while not a lie, is nothing more than mental masturbation when your post contains a caveat for having the knowledge and proper tools. One of the AR15 engineers under Gene Stoner pretty much said that the M4 isn't a good platform, especially once the gas port erodes a bit. Our 6mm ARC barrel come standard with 1-7.5 Twist, M4 Feed Ramps and gas tube. Can I use a barrel with M4 feed ramps with an upper that isnt M4 matched? Is getting it as part of the upper better? hey bro nice to see you here!!! Looking for a black stripped A1 upper with non m4 feed ramps (just realized the upper I have wont work with my barrel). Only took a few minutes. In military situations, it is advantageous for rifles to function with damaged, worn, or less than ideally serviceable magazines. It's not worth changing the barrel extension on an already finished barrel, getting the new barrel extension to line up correctly with the gas port will probably cost more in gunsmithing/machining fees than buying a new barrel. It's going to a gunsmith to be shortened and rethreaded anyways, can they just grind/polish the feed ramps to match or is it more involved than that? *Must have a registered ARFCOM account to win. By my estimates, the tip of the bullet first hits the barrel extension about 1/3 of the way up the respective feed ramp on the barrel extension. Rifles, Uppers, Lowers, Barrels, and more, [ARCHIVED THREAD] - Rifle vs m4 feed ramps, http://i135.photobucket.com/albums/q125/PursuitSS/Postings%20photos/c0d26170b75c3e6f9ea65a7d0862247e.jpg. Just because you can, doesn't mean you should. You want them to match. By Yamil Sued August 6, 2021. Upper Receiver, A4, Flat Top, USGI, Numbered, AR-Stoner Upper Receiver Stripped AR-15 A3 Flat-Top Matte, Black River Tactical 16 Cold Hammer Forged Optimum Barrel Accuracy Evaluation. Here you can see an upper with "rifle" feedramps. Bullets tend to bump, snag, and stub on these guns. All things being equal and having used both weapons extensively, Id rather have the feed Ramps. Please be respectful of others. Reddit and its partners use cookies and similar technologies to provide you with a better experience. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. Barrel customizations are also available. A forum community dedicated to drag racing drivers and enthusiasts. So there's a lot more going on with rounds bouncing up and down in the mags etc. I would just make sure to order rifle upper with rifle barrel extension or M4 upper with M4 barrel extension. They . BEFORE YOU GO MODIFYING IT, check your headspace.I have a Gibbz upper in my junk drawer because the upper -- for some reason -- wouldn't allow a perfectly good bolt (as checked by Criterion) to headspace correctly on a Criterion barrel, with the bolt installed in the carrier. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. It's an interesting question. The barrel extension and the receiver both have to have the cuts. So, lets glide down these lines below to erase your misconceptions about them. Product Description Surplus Colt 14.5" SOCOM, carbine length gas system barrel from Colt. Founded by Frank Galli in 2000, Snipers Hide has been offering informational videos, podcasts, and other support to its users in one location. so it is better to have an upper reciever that's designed for non-m4 feed ramps since you can put in standard barrels right? Then the manufacturer discontinued the barrel. The angle is going to be key, alot of people attempt to mimic the angle of the barrel feed ramps, this is incorrect. Im an old vet, now retired and looking to build some ARs as a hobby to keep me doing something that I will enjoy. So the engineers lowered the feed rampa into the receiver. However, if youre wanting to rebarrel a non-M4-cut upper with an M4 feed-ramp equipped barrel, or going the other direction: you have a new upper thats been relieved to fit with the M4 ramps, and a non-M4-cut barrel extension, and that wont work! Sorta. Amazing what happens in a thread over a simple question. Clear editor. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. Ready to drop onto a complete lower receiver. Looking For Bear Creek Arsenal Barrels Review? well.. it's kinda hard to get stuff in this part of the world. Create Account; Log Out ; Log In ; Wishlist 0; Shopping Cart 0; Home; About The Bullet ~ Handguns, Rifles and Shotguns, http://thearguys.com/ar-facts/m4-feed-ramps/. The ramp angles are different and changing the profile of the extension doesn't make it something it isn't. The barrel Throat is the second most critical component after angles and should be polished with utmost care. An older-version (or A2-style) feed ramp is cut only on the barrel extension itself (top). - The Shooter's Log, 2012 SHOT Show Special Report: Del-Ton TRX Rifle and More! I didnt think anything about it having M4 feed ramps. It has ran flawlessly (barring tuning of the gasblock when new) with several different brands of magazines and ammo. Previous. I notice that's a Gibbz (or Gibbz-type) upper. There's a 7 degree difference between standard and M4 ramps. This is one time it's better to go a little too far than to leave an edge for the . pictures would help. It gives a longer ramp that is less steep into the chamber. Thread: Adding M4 feedramps to A1/C7 upper. You can always buy a non-m4 extension and have the new barrel retimed and headspaced, but it will probably cost more than a new upper receiver. With the bcg moving that much faster, the magazine springs were having a hard time supplying the rounds fast enough, AS WELL AS the tips of the rounds were digging into the feed ramps and catching. For a better experience, please enable JavaScript in your browser before proceeding. A shorter gas tube means reduced gas pressure, and we all know what happens when there isn't enough pressure to cycle the bolt carrier group properly. Metal cases ammunition such as Wolf through an M4 clone? Its also recommended you polish the ramps once youve achieved the appropriate angle. Those ramps line up with the barrel, which are cut deeper than on a rifle barrel. Thanks! Ok, So, in short, I've got a barrel on my Armalite upper (with M4 feed ramps in the upper) that has standard AR-15 (non-M4) ramps. Description Genuine 14.5" SOCOM, carbine length gas system barrel from Colt. April 23, 2014 in Rifle - Technical. Looking to spend $180-250 (depending on condition, forge mark and if a rear sight is included or not.) This is a big tip, by the way, for pistol-caliber ARs. The information provided here does not represent the views of Cheaper Than Dirt! 3. Which Model Colt 1911 is For Me? Anything else you want to share about M4 clones would be appreciated, especially when it comes to a reliable rifle. An upper without feed ramps can be used with a barrel that has them as the majority of the ramp is on the barrel extension. I'll probably build a pistol out of this one. By With a larger diameter case body sitting down in the magazine, the tip of the bullet sits lower in relation to the chamber/bore centerline than with a .223-size round. The tip of the cartridge rarely comes into contact with the upper receiver. For new construction barrels only. Avoid Polishing Too Lightly Or Too Roughly M4 Barrel Extension (M4 Feedramps) $22.95 (4 reviews) SKU: Barrel-Extension-M4 Stock Status: Quantity: Add to Wish List Description For your AR15, M16, M4. Don't ever put non M4 ramped barrel on a M4 ramped upper receiver. Using an upper with M4 feed ramps with a barrel that does not have them will lead to feed problems as it creates a ledge/lip that can catch the bullet tip as it tries to feed. They are better! If this is your first visit, be sure to
I like getting another Upper idea then you could end up with two rifles! 5. Powered by Invision Community. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Owning Best Ruger SR9c Accessories Can Change Your Life. America's Ultimate Shooting Sports Discounter, Click to share on Facebook (Opens in new window), Click to share on Twitter (Opens in new window), Click to share on Pinterest (Opens in new window). But, as with anything else, this work can go too far. Related: If you are using a Ar rifle, best green laser sight is good choice for hunting. So, I had purchased a 458 upper. It's near impossible to replace the carry handle upper I have these days, and finding a colt chrome lined 20" light weight barrel isn't a walk in the park either. this is the barrel designed and profiled for the Mark 12 Mod 0 uppers and rifles. The best case is to have both an upper and barrel that have the feed ramps. Most of barrel assemblies and upper receivers on the market now have a present of M4 feed ramps. If I was concerned with precision, I would seek out parts from well-known gun makers and customizers Baer comes to mind, Hart barrels, etc etc. True, which is why they're not even needed in semi autos. All comments are held for moderation and will appear after approval. Interesting reading. Use this M4 Barrel extention with M4 feedramps. Additionally, in this increasingly specialized world of AR-15 parts that we live in, there are proprietary feed ramp cuts used for some alternate cartridges, such as .458 SOCOM. Please allow 5~10 days for assembly and testing before ship date. AAC and anybody else that has any reasonable expectation of quality and reliability use an M4 feed ramp. Pasted as rich text.