As a result, the factory machined M4 feed ramps on the receiver are hard coat anodized which adds significant strength to the aluminum. First, the M4 barrel and non-M4 upper isnt likely to cause issues, but due to the relief cut on an M4-spec upper, there will be a gap that works like an edge that most definitely can snag the bullet and stub the round. The tip of the cartridge rarely comes into contact with the upper receiver. Barrels are Douglas 416 stainless steel with 1-7 twist with M4 feed ramps I don't quite trust myself to give it a go, but if that's all there is to it I'm hoping they can do it for a reasonable price. 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. M4 Feed ramps on barrel extensions are a solid example. You want them to match. Some argue that, factually, its a step to enable a smoother feeding. Then you can get a regular rifle barrel for the upper with no ramps. I checked what I have now. By I recently built an AR9 (Glock Mags) that has been running flawlessly for about 3-400rds. The Fora platform includes forum software by XenForo. They . so im thinking I might as well just get the unramp upper. 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. 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. Rifle vs m4 feed ramps - AR15.COM "A Bad Day At The Range Is Better Than A Great Day Working". April 23, 2014 in Rifle - Technical. Add M4 cuts to Barrel Ext $15.00 We can modify your rifle extension to match the M4 cuts in an upper receiver. I'm lookin for a clear definition as to what they are, and what they do to enhance a given rifle's performance? JavaScript is disabled. This is a big tip, by the way, for pistol-caliber ARs. 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. If you ever have an issue, then look at getting a correct barrel for the upper. 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. 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. M4 Feedramps - AR-15 Pro - The Shooter's Log, 2012 SHOT Show Special Report: Del-Ton TRX Rifle and More! Shorter length equates to much higher pressure in the upper receiver. Display as a link instead, Does anyone have a follow up that confirms or denies my claim? You can post now and register later. Upper Receiver WITHOUT M4 Feed Ramp Cuts? - Sniper's Hide Forum i have the rifle barrel. Thread: Adding M4 feedramps to A1/C7 upper. 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 Check often for fit. Feed Ramps -300BlkTalk 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. Good call. Description Genuine 14.5" SOCOM, carbine length gas system barrel from Colt. Feeds flawlessly. No feed ramps. While I've got everything apart, I'm thinking I just want to put an M4 barrel extension on. Barrel FAQs | Ballistic Advantage Konza Defender M-LOK 5.56 16" Rifle - $399.99 | gun.deals A couple of times I ended up with the OK set up from the picture above. 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). It has ran flawlessly (barring tuning of the gasblock when new) with several different brands of magazines and ammo. EDIT: Okay, I understand now! 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. It's best to use rifle/rifle combo or M4/M4. The information provided here does not represent the views of Cheaper Than Dirt! 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. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. CARBON-15 Stripped Lower Receiver Backing up a ton: Any and all AR-15 barrel extensions have feed ramps. Adding M4 feedramps to A1/C7 upper - M4Carbine.net You are using an out of date browser. Looking to spend $180-250 (depending on condition, forge mark and if a rear sight is included or not.) 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. 14.5" M4 SOCOM Barrel Assembly with Sight Tower - Brownells 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). Brevity matters. Colt LE6920SOCOM M4 Carbine 5.56 16.1 Barrel SOCOM Sight 30-rd 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. M4 feed ramp barrel in a non M4 ramp upper - AR15.COM The A2's are pretty reliable guns, but trashed mags can cause them to have malfunctions also. Thats an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. FN AR-15 5.56 NATO 20" Hammer Forged Barrel - Black I use it for hunting dogs only. again, Thanks. So, lets glide down these lines below to erase your misconceptions about them. colt A1E1 733 uppers didn't have extended carbine feedramps ? RTS Bartlein: 6mm ARC 26" - Compass Lake Engineering, LLC Higher pressure equte to parts (bcg, buffer, buffer spring, ROUNDS, etc) experiencing much higher wear/tear. 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. If it was some flat top + 16" FSB barrel id just swap upper/barrel, but this is a little more challenging to do that with. If this is your first visit, be sure to They guide the bullet up and into the chamber. Thanks for explaining the feed ramp topic in a couple of different ways. Lol. You will be able to leave a comment after signing in, AR15Armory.com Some gun owners believe that the M4 ramps can help for some of the larger-diameter cartridges in use. I'm assuming that you only need the ramps from one or the other. 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. 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. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. 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. The Shooter's Log, is to provide informationnot opinionsto our customers and the shooting community. Thats why AR10s- And Scar heavies exist for. [ARCHIVED THREAD] - M4 feed ramp barrel in a non M4 ramp upper. Avoid Polishing Too Lightly Or Too Roughly Seems like it should work to me, but be a real challenge to keep clean and be damned ugly to boot. We reserve the right to edit as appropriate, delete profane, harassing, abusive and spam comments or posts, and block repeat offenders. Does it make a big difference? Please be respectful of others. It is removeable with a special wrench and a barrel clamp/vise. 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. AR Tech Tip - Checking M4 Ramps for overhang School of the American Rifle 84.8K subscribers Subscribe 2.9K 90K views 2 years ago AR Tech Tip - Checking M4 Ramps for overhang Show more Show more. You need to match up barrels to receivers for optimum performance. For use by barrel manufacturers. 30 cal. My alternative plan is to do exactly as you describe. Create an account to follow your favorite communities and start taking part in conversations. Del-Ton, Inc. AR-15 16" M4 Custom Upper The ramps on the regular rifle-type extension are cut just to the edge of the extension. For instance I was looking at the BCM upper receiver, and it said it had M4 feed ramps machined into the upper. My experience with ARs is all A-1s. If a barrel comes with the feed ramps could I take them off? 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 (theyre lowered). 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 . Edited April 27, 2014 by Mark Gale Amazing what happens in a thread over a simple question. hey bro nice to see you here!!! Either way is good and both types work great with semi auto only guns. So the engineers lowered the feed rampa into the receiver. Is getting it as part of the upper better? Reliability is the main concern for me when I re-barrel this rifle. Feels like a silly question now that it makes sense. Required fields are marked *. 4. 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. Rifles, Uppers, Lowers, Barrels, and more, [ARCHIVED THREAD] - Rifle vs m4 feed ramps, http://i135.photobucket.com/albums/q125/PursuitSS/Postings%20photos/c0d26170b75c3e6f9ea65a7d0862247e.jpg. Dec 17, 2020. Gas block area is .750 diameter. and add them to non-m4 barrels.? Feed ramps on barrel extensions are a good example. aaargh.. that's the setup I hate to see. AR Tech Tip - Checking M4 Ramps for overhang - YouTube We want you, our readers, to be able to make informed decisions.