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Upload or insert images from URL. I too built a .458 SOCOM carbine . Theres a bit more to it than just polishing. Modify AR15 A2 barrel extension for M4 feed ramp? Only took a few minutes. 50 bucks one way or the other on the barrel ain't squat! Then you can get a regular rifle barrel for the upper with no ramps. The M4 ramps, if I am not mistaken, were originally made to help reduce malfunctions on the M4 carbine. The first reason is that they are, indeed, better. 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. CARBON-15 Stripped Lower Receiver 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. Add 3% to the total cost for credit card purchases. The ramp angles are different and changing the profile of the extension doesn't make it something it isn't. M4 M-4 Feed Ramp Jam with 55 gr grain Bullets, Solution, Fix, AR15 AR-15 Stuck Cartridge iowaunemployment 21K views 10 years ago Comparing AR15 barrels -Faxon vs. Bear Creek arsenal-. LanceRiley, They provide a lower, wider, and smoother entry for any round of ammo, whether its necessary or not. One new winner* is announced every week! I've seen uppers with and without anodizing on M4 ramps . it seems to me to be about 50/50 with and without. hey bro nice to see you here!!! Questions on how to install your new BA barrel? 14.5" M4 SOCOM Barrel Assembly with Sight Tower - Brownells They were not intended to be super long range man killers. 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. The best case is to have both an upper and barrel that have the feed ramps. Which Model Colt 1911 is For Me? well.. it's kinda hard to get stuff in this part of the world. This Kit is made to cut or polish the STEEL Feed Ramps on your Barrel Extension ONLY. http://www.ar15fornoobs.com/wp-content/uploads/feedramps.jpg. It's best to have M4 ramps on both the upper and barrel. Contents: 1 Diamond Burr (For Colt 2 Stage Ramps) 1 Cut Lube (For Diamond Burr) 1 Bullet Stone (For Reshaping . Finding the proper upper receiver is your best option. Anodized red parts. For instance I was looking at the BCM upper receiver, and it said it had M4 feed ramps machined into the upper. I cant advise on that one folks. 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. They are better! Thanks for explaining the feed ramp topic in a couple of different ways. Founded by Frank Galli in 2000, Snipers Hide has been offering informational videos, podcasts, and other support to its users in one location. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. Add M4 cuts to Barrel Ext $15.00 We can modify your rifle extension to match the M4 cuts in an upper receiver. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. Feeds flawlessly. Id just get one for that barrel and find a barrel with m4 extension for the upper you already have. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. I have seen it done many, MANY times and if done right, it works/functions 100% without issue. aaargh.. that's the setup I hate to see. If your mag catch is at Spec height, you should not have a problem with an M4 cut barrel in a rifle receiver. Sorta. Not saying a really good gunsmith cant do it, just that theres a bit of an involved process. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. ago Costs about $40-50 to have the feed ramps reprofiled from what I can gather. Looking to spend $180-250 (depending on condition, forge mark and if a rear sight is included or not.) Any use of this content without express written consent is prohibited. They . Not all mil-spec features advertised on the product information are the real mil-specs. The photo shows the dents and the bolt lugs line up perfectly. After two months of back and forth, cleaned up the feed ramps. Description. M16s and M16-A1s run at 750 rounds per minute in full auto. The M-16/M4 are great weapons. 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. It is milled out of 6061 T6. Issues can arise when receivers and barrel extensions are mismatched. For use by barrel manufacturers. Press question mark to learn the rest of the keyboard shortcuts. Ar-15 Manufacturers Should Be Avoided: Which Should You Buy? All Rights Reserved. If you have a m4 ramped upper but not barrel you can cause problems as there's a lip of steel barrel extension in the way that can cause feeding problems. Thanks! If you aren't 110% comfortable with doing the job, and you do not have all the tools and equipment to do it properly, then have a smith do it for you. Just because you can, doesn't mean you should. However, its rare now to find an upper receiver or a ready-to-go barrel that doesnt have the M4 cuts. FN AR-15 5.56 NATO 20" Hammer Forged Barrel - Black If it's happening regularly, check the magazines you are using for serviceability. The closest brand new barrel you are likely to find is the Windham Weaponry 20 inch 1/7 twist chrome lined barrel. Some gun owners believe that the M4 ramps can help for some of the larger-diameter cartridges in use. 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 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. All Rights Reserved. Barrel customizations are also available. i have an extra brand new M4 barrel extension ramp to replace a rifle ramp. Barrel, sight and trigger work on most pistols and shotguns. 338 and others not the .308 76251 or 6.5 creedmore which o think should have a.30cal feed ramp.? 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 barrel is supposed to have the M4 feed ramps. Feels like a silly question now that it makes sense. The last is using the best and right ammo for the job. Is it kosher to add M4 feed ramps to a standard upper to match an m4 ramped barrel? Another reason is that any commercial receiver and parts makers want to tool up to make upper receivers and barrel extensions, especially when shorter guns are becoming more popular. 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? How to Polish a Feedramp Quick and Easy | Firearms Talk 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. I guess it depends on what your relationship to the necessary shop activities is. Modern Series Barrels. If your upper isn't showing signs of bullets rubbing on the aluminum under the barrel extension, you should be good with M4 ramps. If you consider this article useful, share it with anyone in need! Upper Receiver WITHOUT M4 Feed Ramp Cuts? - Sniper's Hide Forum They guide the bullet up and into the chamber. Copyright 2016 - 2023 by AdventureFootstep.com. AAC and anybody else that has any reasonable expectation of quality and reliability use an M4 feed ramp. 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. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. It may not display this or other websites correctly. 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. m4 feed ramps - The Armorer - AR15Armory.com The A2's are pretty reliable guns, but trashed mags can cause them to have malfunctions also. 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. Press question mark to learn the rest of the keyboard shortcuts. I like getting another Upper idea then you could end up with two rifles! Is one better than the other? Reddit and its partners use cookies and similar technologies to provide you with a better experience. Reliability is the main concern for me when I re-barrel this rifle. 16" Pre-Ban M4 Profile Barrel Assembly CARBINE Gas System About Upper assembly comes completely head spaced and test fired. The Shooter's Log, is to provide informationnot opinionsto our customers and the shooting community. The M4 style feed ramps and barrel extension provide consistent feeding and the matte black Manganese Phosphate finish resists external corrosion and oxidation. 30 cal. I have looked and looked and looked. The only one I found is LaRue's upper, but it won't work with the hand guard I'm using (Geissele MKIII). I picked up a side charging upper from Sundevil last year. 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). Should not be too hard. 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 . Feed ramps on barrel extensions are a good example. In general, all you need to understand is that the M4 feed ramps include the barrel extension and upper receiver. Installing a Luth-AR Rifle Buffer Tube and an A2 Stock #1041. For the purposes of this chapter, we'll call the new one the M4, and the old one the AR. Barrel is medium SPR profiled barrel, threaded with a 1/2-28 thread for the AE brakes and collar. Edited April 27, 2014 by Mark Gale A couple of times I ended up with the OK set up from the picture above. The barrels also had to be modified. I can assure you that most mods that deviate from the original design aren't 100% reliable. They are also 1/7 twist, 4150 steel, chrome lined, and button rifled like the real deal! It is removeable with a special wrench and a barrel clamp/vise. Thank you for answering the question do well. AR15 Feed Ramp Cut & Polish Kit - School of the American Rifle Whether they materialize or not depends on the direction of the mismatch. Either way is good and both types work great with semi auto only guns. No feed ramps. There is no way to make a carbine barrel extension out of a rifle barrel extension, period, full stop. While this gun is a more of novelty build than a "serious use" AR, I intend to use good parts and want it to run as well as my other ARs. Change the angle so that the ramp ends at the exact same point. Thread: Adding M4 feedramps to A1/C7 upper. I've thought about it myself, and I'd like to see test results if any exist, displaying what reliability effect M4 ramps have on other barrel lengths. I like all my guns to be reliable. Ballistic Performance of Federal Punch .22 LR Ammunition with the Heritage Barkeep #1063. and add them to non-m4 barrels.? are all barrels w/ m4 feed ramps?? 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. The manufacturer said they had sold hundreds of barrels with out problems reported. All uppers are assembled cleaned and tested before shipping. 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. 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. I will check with compass lake. Rifles, Uppers, Lowers, Barrels, and more, [ARCHIVED THREAD] - Rifle vs m4 feed ramps, http://i135.photobucket.com/albums/q125/PursuitSS/Postings%20photos/c0d26170b75c3e6f9ea65a7d0862247e.jpg. Making a non M4 feed ramp barrel work in an M4 feed ramp upper. Metal cases ammunition such as Wolf through an M4 clone? The magazine lips cannot move, so with these larger diameter cartridges, the bullet tips down lower about the centerline of the bore (half of the diameter increase to be exact). Please be respectful of others. 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. I had seen these pix years ago and dismissed the idea of mix and match. pictures would help. Single Action and Double Action Which One Is Better For You? Everything that you have on your side to make any weapons more reliable and work when it absolutely needs to is a plus. Gun smith said , not head spaced properly. The mil actually only specs M4 feed ramps for use in its M4s. Try this little exercise: 1. Create Account; Log Out ; Log In ; Wishlist 0; Shopping Cart 0; Home; About Barrels are Douglas 416 stainless steel with 1-7 twist with M4 feed ramps Copyright 1996-2023 AR15.COM LLC. Instead, I just loaded up each mag with two rounds, and pushed the rounds forward by hand until the tip of . . We reserve the right to edit as appropriate, delete profane, harassing, abusive and spam comments or posts, and block repeat offenders. Interesting reading. It was in the last few issues of SAR. 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. A closer look at uppers and barrel extensions. Please allow 5~10 days for assembly and testing before ship date. 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. The rifle-platform M16s dont use them. So, an M4 feed ramp includes the barrel extension and the upper. AR9 - Help diagnosing feeding issue. To conclude, the M4 feed ramps bring a lot of improvements to the AR-platform firearms. I recommend putting any AR-platform firearm together with a matched M4 barrel extension and upper receiver set, just because you can. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Experts advise on 31 degrees+30 minus-zip. This can lead to a rare but odd situation; barrel and receiver mismatch. 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. The M4 was the first (allegedy) carbine length gas system. I was planning on using a Daniel Defense 14.5 pencil barrel, because like the C8 they are CHF, lightweight profile, and .750 at the FSB (And also because quality carbine pencil barrels with .625 gas blocks seem to be in short supplyor else I'd just build a 723 clone.) .