You want them to match. Polishing the edges of the chamber mouth to remove the edges of that chamfer will. i have the rifle barrel. The barrels also had to be modified. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. Its not a big deal but still an important thing to remember and understand. The angle is going to be key, alot of people attempt to mimic the angle of the barrel feed ramps, this is incorrect. There's a 7 degree difference between standard and M4 ramps. No need to alter the upper. 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. By the time you made it work you spent more time, money, and effort than if you just bought a new barrel or upper. So I'm thinking I ought to have M4 ramps in the gun because based on what I've read: Rifle receiver+M4 barrel = "OK" but not ideal. 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. The best case is to have both an upper and barrel that have the feed ramps. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. I replaced the M4 feed ramp barrel with a monolithic feed ramp barrel and no more problems. 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. AAC and anybody else that has any reasonable expectation of quality and reliability use an M4 feed ramp. The M4 cut extends down beyond the edge of the barrel extension (has a scalloped appearance), and a correspondingly deeper cut in an M4-spec upper receiver effectively extends the ramps downward (they're lowered). By accepting all cookies, you agree to our use of cookies to deliver and maintain our services and site, improve the quality of Reddit, personalize Reddit content and advertising, and measure the effectiveness of advertising. I wont buy a barrel that isnt a wylde 223 556 but Im only now noticing. So, what youre saying is that an M16 upper (not M4 cut) will work with either barrel, but an M4 cut upper will only work with an M4 cut barrel. Douglas 5.56 Stainless Steel Barrel 18" - 1~7 twist On the other hand, I wouldn't consider them as a deal breaker, and they would not pass up a good deal with an upper only because it did not have them - the M4 feed ramps. Ideally both. Seems M4 is all the rage these days. The M4, and the CAR-15, before it have had similar problems like the ones you mentioned. Ar-15 Manufacturers Should Be Avoided: Which Should You Buy? Damaged Ak front end Barrel in Trunnion with or without sight bases. This is why you can use a barrel with an extension with M4 feedramps with a receiver that does not have feedramps, but you cannot use a receiver with M4 feedramps with a barrel with an extension with rifle feedramps. Full M4 feed ramps are on both the upper and barrel extension. It gives a longer ramp that is less steep into the chamber. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. The upper I want to rebarrel is modified for Service Rifle competition so it's not quite as cheap as buying another $89 upper from Aero. Rifles, Uppers, Lowers, Barrels, and more, [ARCHIVED THREAD] - Rifle vs m4 feed ramps, http://i135.photobucket.com/albums/q125/PursuitSS/Postings%20photos/c0d26170b75c3e6f9ea65a7d0862247e.jpg. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. Its highly recommended to put any AR-platform firearm together with a matching M4 barrel extension and upper receiver set. Create an account to follow your favorite communities and start taking part in conversations. They . I've modified barrel/receivers even before M4 cuts came out and done some receivers when the barrels had cuts. So, lets glide down these lines below to erase your misconceptions about them. M4 feed ramps were created during the development of the xM4 carbine for the original Army requirement of a carbine rifle that used the then current M16A2 upper receiver, 14.5" Barrel and had featured a collapsible sliding stock. By using the M4 feed ramps for your firearm, you could pick up an increased percentage of the rounds, and feeding reliability would be improved. Gas block area is .750 diameter. These Mil-Spec M4 feed ramps are part of the original CNC manufacturing process. I'm planning on replacing my forearm with a Larue 13.5. which is basicallly an m16a1 cut down. can the barrel extension be bought individualy? Please be respectful of others. 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. Feed ramps on barrel extensions are a good example. It's best to use rifle/rifle combo or M4/M4. So I called. Some suggest taking a grinder to the extension area. This is a big tip, by the way, for pistol-caliber ARs. All Rights Reserved. They guide the bullet up and into the chamber. Product Description Surplus Colt 14.5" SOCOM, carbine length gas system barrel from Colt. 14.5" M4 SOCOM Barrel Assembly with Sight Tower - Brownells Clear editor. 3. You need to match up barrels to receivers for optimum performance. The closest brand new barrel you are likely to find is the Windham Weaponry 20 inch 1/7 twist chrome lined barrel. AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. Experts advise on 31 degrees+30 minus-zip. Standard vs M4 Feed Ramps, what's the difference #1056 [WTB] Black A1 carry handle upper NON-m4 feed ramp $200 It's best to have M4 ramps on both the upper and barrel. The Bullet ~ Handguns, Rifles and Shotguns, http://thearguys.com/ar-facts/m4-feed-ramps/. It is removeable with a special wrench and a barrel clamp/vise. 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. are all barrels w/ m4 feed ramps?? All Rights Reserved. I've shot a good deal of rounds through 20" A2's and I realize they run but you are describing issues that the M4 feed ramps alleviate, that would probably be good to reduce on A2's as well. Forged 7075-T6 aluminum is harder than a bulls balls. It is milled out of 6061 T6. Anything else you want to share about M4 clones would be appreciated, especially when it comes to a reliable rifle. Is getting it as part of the upper better? How to Polish a Feedramp Quick and Easy | Firearms Talk Guess what? I had seen these pix years ago and dismissed the idea of mix and match. Do you have an AR barrel or feed ramp tip? AR15 Feed Ramp Cut & Polish Kit - School of the American Rifle Its fine to use an M4 Barrel with a non-N4 (rifle) upper but if you have the barrel already is much simpler to just buy a M-4 upper and just replace the upper the barrel is harder to build..I have even cut ramps on a rifle upper and it really wasent needed That is before I knew better.Then I guncoted the ramps before I found out about Aluminum Black treatment. *Must have a registered ARFCOM account to win. I guess it depends on what your relationship to the necessary shop activities is. They provide a lower, wider, and smoother entry for any round of ammo, whether its necessary or not. I recently picked up a barrel that I thought had M4 feed ramps, but it doesn't line up with my M4 feed ramp upper. 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. Powered by Invision Community. Went back to the sellers website and found I was not the only one with problems. Press question mark to learn the rest of the keyboard shortcuts. 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. Previous. With the increased use of larger-diameter cased cartridges, the M4 feed ramps are proving their values when using them in those cartridges. If it's happening regularly, check the magazines you are using for serviceability. However, an M4 barrel extension is dished more so the feed ramps could extend downward, and then an area within the upper is shaped to match. FN AR-15 5.56X45mm Nato 14.70" M4 Profile Barrel Carbine Length Gas All things being equal and having used both weapons extensively, Id rather have the feed Ramps. hey bro nice to see you here!!! from my service in the 70s to my personal weapons, all of my ARs are early 1970 slab sided Colt SP1s. By accepting all cookies, you agree to our use of cookies to deliver and maintain our services and site, improve the quality of Reddit, personalize Reddit content and advertising, and measure the effectiveness of advertising. However, they do have M4 feed-ramps which is not clone correct. And that is the important thing! Only took a few minutes. A couple of times I ended up with the OK set up from the picture above. This space is for pictures of "retro" Stoner rifles and completed or partial retro AR-15 builds, as well as discussions about either. That puts the cartridge in a position where the extended feed ramp improves the breech-loading design. Barrel FAQs | Ballistic Advantage How long your barrel "lasts" depends on what your accuracy threshold is before you decide it is too bad to keep using. FN AR-15 5.56X45mm Nato . Well, over the course of 5,000 rounds at .40 a round, you spent two grand on ammo. The difference between standard feed ramps and M4 ramps is easy to see. Ballistic Performance of Federal Punch .22 LR Ammunition with the Heritage Barkeep #1063. can you buy feed ramps individually? Can I use a barrel with M4 feed ramps with an upper that isnt M4 matched? 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. That is what I tell people when they try to convince me that they need a stainless barrel instead of chrome-moly. I like all my guns to be reliable. is the m4 feedramp common in barrel extensions? It may not display this or other websites correctly. BrianEnos.com Any use of this content without express written consent is prohibited. M4 16", SBN, 1:7, 5.56 NATO Barrel Specifications: - Caliber: 5.56 NATO (.223 REM) - Gas Tube: Car Add to Cart. - The Shooter's Log, 2012 SHOT Show Special Report: Del-Ton TRX Rifle and More! Seems counter intuitive to recommend an M4 cut upper, especially if the barrel Im looking at has the rifle feed ramp (not M4 cut). They offer a lower, more extensive, and smoother entry for any round of ammo, whether its necessary or not.
adding m4 feed ramps to barrel
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