Some gun owners believe that the M4 ramps can help for some of the larger-diameter cartridges in use. Feed ramps on barrel extensions are a good example. 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. 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. Metal cases ammunition such as Wolf through an M4 clone? BCM 16" M4 Carbine Upper Receiver Group | BravoCompanyUSA 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. Share it in the comments section. "It will last 5k rounds instead of 4k. 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. It has 2 ramps cut into the receiver to help the rounds feed into the chamber. The closest brand new barrel you are likely to find is the Windham Weaponry 20 inch 1/7 twist chrome lined barrel. I'd rather just pay the gunsmith to make it work than hunt down another barrel/upper if possible. With the increased use of larger-diameter cased cartridges, the M4 feed ramps are proving their values when using them in those cartridges. FFL Fax: 866-721-8691. 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. Does it make a big difference? I've seen that pic, it is a good reference. Well, over the course of 5,000 rounds at .40 a round, you spent two grand on ammo. Oh well, as I tell my lovely and understanding bride, guns are relatively free. it's the ammo and training that cost real money. This space is for pictures of "retro" Stoner rifles and completed or partial retro AR-15 builds, as well as discussions about either. 11.5", SBN, 1:7, 5.56 NATO Barrel The mil actually only specs M4 feed ramps for use in its M4s. 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. are all barrels w/ m4 feed ramps?? Is getting it as part of the upper better? You can post now and register later. 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. A couple of times I ended up with the OK set up from the picture above. Create an account to follow your favorite communities and start taking part in conversations. As a result, the factory machined M4 feed ramps on the receiver are hard coat anodized which adds significant strength to the aluminum. 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 . One new winner* is announced every week! They provide a lower, wider, and smoother entry for any round of ammo, whether its necessary or not. 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. 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? The Bullet ~ Handguns, Rifles and Shotguns, http://thearguys.com/ar-facts/m4-feed-ramps/. BUT if you find someone to grind your feed ramps and they do a good job, post it up and let us know. I should have taken my own advice for once. ago Costs about $40-50 to have the feed ramps reprofiled from what I can gather. All this basically means is that the ramps continue from the barrel extension down through the upper receiver tonthe magazine. Also, barrel life is relative. The Differences Between an M4 and an AR15 - Music Raiser You also repeated yourself. If this is your first visit, be sure to The barrel extension and the receiver both have to have the cuts. Factory said its fine . 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. In general, all you need to understand is that the M4 feed ramps include the barrel extension and upper receiver. I recently built an AR9 (Glock Mags) that has been running flawlessly for about 3-400rds. Good call. M4-style barrel extension with Rifle-type upper - Rifle - Technical pm me at BOG or PG, or get in touch with my number 09177542777 if you're interested. All uppers are assembled cleaned and tested before shipping. Feed Ramp Polishing - How To Do It Properly? - Homestead & Prepper The dimensions are different between the two, so theyd have to change some things to the feed ramps dimensions. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. For the purposes of this chapter, we'll call the new one the M4, and the old one the AR. AR Tech Tip - Checking M4 Ramps for overhang - YouTube The only other time it seems to help is if the mag is feeding the rounds with the bullet slightly angled lower than normal. - The Shooter's Log, 2012 SHOT Show Special Report: Daniel Defense DDM4 V5 in .300 Blackout and a Factory SBR - The Shooter's Log, 2012 SHOT Show Special Report: SOG Armory Predator Rifle - The Shooter's Log, Surefire's 100-Round MAG5-100: The Highest Capacity AR-15 Magazine - The Shooter's Log, Throwback Thursday: Taurus Judge Range Report, ATI Milsport SGA 410 All the Advantages of an AR in .410, Ruger SR1911 LW Commander The Lightweight .45 ACP, Rifle Hack: Sighting for 100 Yards at a Distance of 25 Yards, Throwback Thursday: All About Bullet Grain. The Fora platform includes forum software by XenForo. This USGI modification was done to both the barrel extension and the upper receiver, creating a longer and steeper feed ramp. Add M4 cuts to Barrel Ext $15.00 We can modify your rifle extension to match the M4 cuts in an upper receiver. I too built a .458 SOCOM carbine . Thats true overall and good to keep in mind. What Are M4 Feed Ramps and What Is The Benefit Of It? - Adventure Footstep Guess what? Feels like a silly question now that it makes sense. Our 6mm ARC barrel come standard with 1-7.5 Twist, M4 Feed Ramps and gas tube. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. I didnt think anything about it having M4 feed ramps. Barrel FAQs | Ballistic Advantage By No Feed Ramps on upper? - General Discussion - 308AR.com Community 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. 308 m5 using m4 feed ramps, which I belive are for the smaller round like. hey bro nice to see you here!!! Your link has been automatically embedded. There is no way to make a carbine barrel extension out of a rifle barrel extension, period, full stop. 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. Went back to the sellers website and found I was not the only one with problems. 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. Notice how the ramp starts on the barrel extension and not in the receiver. So like ORD says it is entirely 100% possible and plenty of people do it, but I would rather not do any work to this perfect barrel. It's best to use rifle/rifle combo or M4/M4. 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. 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. 4. 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). Gun smith said , not head spaced properly. The barrels also had to be modified. A feed ramp is a basic feature of many breech loading cartridge firearm designs. Copyright 2016 - 2023 by AdventureFootstep.com. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. For those who have actually done it will a new barrel with the M4 feed ramp extension function properly with an old school rifle-type upper receiver? They are better! "C" stamp and CAGE code available. Backing up a ton: Any and all AR-15 barrel extensions have feed ramps. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. EDIT: Okay, I understand now! Jams and misfires. 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. By How to Polish a Feedramp Quick and Easy | Firearms Talk The information provided here does not represent the views of Cheaper Than Dirt! AR 15 16" .350 Legend Nitride M4 Profile Barrel 1:16 Looking to spend $180-250 (depending on condition, forge mark and if a rear sight is included or not.) The M4 ramps, if I am not mistaken, were originally made to help reduce malfunctions on the M4 carbine. If I can correct an issue before it's an issue that is preferred. Just put it in and shoot it. JavaScript is disabled. 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). When you need to nail something you use a hammer not a wrench. 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. They offer a lower, more extensive, and smoother entry for any round of ammo, whether its necessary or not. I think my question would be why rifle receiver+M4 barrel is just "ok" rather than "good", unless the point is that in a carbine-gas gun M4 ramps are just considered an improvement over no ramps. 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 Cutting M4 feed ramps - Calguns.net 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. April 23, 2014 in Rifle - Technical. Both. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. 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-. 14.5" M4 SOCOM Barrel Assembly with Sight Tower - Brownells AR-15 Feed Ramp Problems - School of the American Rifle 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! 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. No feed ramps. Previous. Some, me included, have said that the M4 ramps are a help to some of the larger-diameter cartridges in use, such as 6.5 Grendel or .22 Nosler. Would not feed to save its life! I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. 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. However, its rare now to find an upper receiver or a ready-to-go barrel that doesnt have the M4 cuts. One new winner* is announced every week! I'm a machinist in the aerospace industry and lucky enough to have. I bought a .458 upper to go with it, with the extra internal clearance cut before anodizing. 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 By Yamil Sued August 6, 2021. I cant advise on that one folks. Press J to jump to the feed. For new construction barrels only. M4 barrel to non M4 receiver is fine, but not the other way around. Upload or insert images from URL. 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. FWIW one of my rifles has M4 feed ramps on the barrel and no M4 feed ramps on the upper and it has functioned just fine. Which Model Colt 1911 is For Me? and add them to non-m4 barrels.? You have a rifle barrel. Either way is good and both types work great with semi auto only guns. You are using an out of date browser. m4 feed ramps - The Armorer - AR15Armory.com Caught a deal on a matched barrel and bolt. Most of barrel assemblies and upper receivers on the market now have a present of M4 feed ramps. M16's fed pretty well before the M4 feed ramps were introduced. By the time you made it work you spent more time, money, and effort than if you just bought a new barrel or upper. DSA has fat top, Mueller, non feed ramp uppers for $40. 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. Everything that you have on your side to make any weapons more reliable and work when it absolutely needs to is a plus. Dec 17, 2020. PRI MK 12 Mod H 16" 223/5.56 Upper w/ 1-7 twist The first reason is that they are, indeed, better. You want them to match. If you consider this article useful, share it with anyone in need! Your previous content has been restored. Reddit and its partners use cookies and similar technologies to provide you with a better experience. On AR9's, I understand the distance between the Mag Follower and the Feed Ramp is a known complication in the design. 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 got my help from this thread, and thank you again to ORD. Surplus Colt 14.5 M4 SOCOM Carbine Barrel 1/7 Twist For someone who is new at trying to understand feed ramps it helps to read a couple different explanations. Insert the barrel and sharpie the cut area, then use the right bit on a dremel. 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 The ramps on the regular rifle-type extension are cut just to the edge of the extension. Full M4 feed ramps start on the upper and continue onto the barrel extension. Check often for fit. M4 feed ramp barrel in a non M4 ramp upper - AR15.COM My experience with ARs is all A-1s. All NFA rules apply. Create an account to follow your favorite communities and start taking part in conversations. It's an interesting question. M16s and M16-A1s run at 750 rounds per minute in full auto.