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In general, all you need to understand is that the M4 feed ramps include the barrel extension and upper receiver. 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. Im an old vet, now retired and looking to build some ARs as a hobby to keep me doing something that I will enjoy. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. Insert the barrel and sharpie the cut area, then use the right bit on a dremel. However the DD 14.5 are ideally meant to mate up with M4 style upper receiver feedramps. 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. I'm a machinist in the aerospace industry and lucky enough to have. M4 Feed ramps on barrel extensions are a solid example. 50 bucks one way or the other on the barrel ain't squat! In short, if you have a Dremmel you can do it yourself. The only other time it seems to help is if the mag is feeding the rounds with the bullet slightly angled lower than normal. DoubleStar M4 clone opinions | Survivalist Forum You cannot paste images directly. Don't forget read more information about it here! There's a 7 degree difference between standard and M4 ramps. Required fields are marked *. i have the rifle barrel. So I'm working on my first build, and I'm a little confused. Seems counter intuitive to recommend an M4 cut upper, especially if the barrel Im looking at has the rifle feed ramp (not M4 cut). Given that most of us dont always have perfect access to truly genuine Mil-Spec, mil-standard parts (those actually used in issued fighting tools), were shopping based on a little part trust and a bigger part knowledge. In case My barrel is rifle ramp it won't be so bad after all. Reliability is the main concern for me when I re-barrel this rifle. They . AR15 Feed Ramp Cut & Polish Kit - School of the American Rifle The M-16/M4 are great weapons. 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. When carrying out feed ramp polishing, it is crucial to prioritize the frame's angles, which is a critical part of the feed ramp. They are better! Its highly recommended to put any AR-platform firearm together with a matching M4 barrel extension and upper receiver set. Also, barrel life is relative. By Can someone recommend or point me in the right direction of a good quality upper receiver for an SPR build that does not have M4 feed ramp cuts in it? Anodized red parts. Adding feedramps - M4Carbine.net A couple of times I ended up with the OK set up from the picture above. There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. Notify me of follow-up comments by email. AR 15 16" .350 Legend Nitride M4 Profile Barrel 1:16 The M4, and the CAR-15, before it have had similar problems like the ones you mentioned. I like all my guns to be reliable. Thanks. Amazing what happens in a thread over a simple question. I bought a .458 upper to go with it, with the extra internal clearance cut before anodizing. M4 Barrel Extension (M4 Feedramps) - Bravo Company USA Ballistic Performance of Federal Punch .22 LR Ammunition with the Heritage Barkeep #1063. JavaScript is disabled. Display as a link instead, No Feed Ramps on upper? - General Discussion - 308AR.com Community Guess what? 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. can the barrel extension be bought individualy? from my service in the 70s to my personal weapons, all of my ARs are early 1970 slab sided Colt SP1s. PSA PA-15 16"M4 Phosphate 5.56 NATO 1/7 Classic AR-15 Rifle with 13.5"M Not saying a really good gunsmith cant do it, just that theres a bit of an involved process. Create an account to follow your favorite communities and start taking part in conversations. 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 All Rights Reserved. This 20" BCM barrel is machined from SS410 stainless steel. This USGI modification was done to both the barrel extension and the upper receiver, creating a longer and steeper feed ramp. This is a big tip, by the way, for pistol-caliber ARs. For a better experience, please enable JavaScript in your browser before proceeding. Pasted as rich text. I will attest that a rifle upper and a barrel with the M4 feedramps works just fine. M4 feed ramps are not an original design, they were designed for the M4 In fact, the . Related: If you are using a Ar rifle, best green laser sight is good choice for hunting. If your mag catch is at Spec height, you should not have a problem with an M4 cut barrel in a rifle receiver. "It will last 5k rounds instead of 4k. I cant advise on that one folks. 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. Feed ramp - Wikipedia Modern Series Barrels. Hasn't misfed yet, through initial break in up through 1k rounds, and that's mag length ammo. Product Details Douglas 18" Flat Dark Earth Cerakoted 416 stainless steel barrel with 1-7 twist and M4 feed ramps. 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. Questions on how to install your new BA barrel? By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. Machined from 4150 Chrome Moly Vanadium Steel and feature a QPQ corrosion resistant finish and QPQ coated M4 feed ramp extension. 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. LanceRiley, All uppers are assembled cleaned and tested before shipping. Single Action and Double Action Which One Is Better For You? M4 ramps help in feeding in for carbine in full auto. Damaged Ak front end Barrel in Trunnion with or without sight bases. And that is the important thing! 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 M4 barrel to non M4 receiver is fine, but not the other way around. There is no way to make a carbine barrel extension out of a rifle barrel extension, period, full stop. You wrote that much to make a point that should have taken about 100 words? The manufacturer said they had sold hundreds of barrels with out problems reported. Copyright 2016 - 2023 by AdventureFootstep.com. We want you, our readers, to be able to make informed decisions. Barrels are Douglas 416 stainless steel with 1-7 twist with M4 feed ramps Load a magazine with two or three rounds, lock the bolt group back on your rifle or carbine and insert the magazine. As they are becoming more and more a standard, and certainly do not do any harm to us. On AR9's, I understand the distance between the Mag Follower and the Feed Ramp is a known complication in the design. #2. The Fora platform includes forum software by XenForo. Sent back again. Other selections are available for upper, bolt and carrier, charging handle, handguards, flash hiders, and gas blocks. Id just get one for that barrel and find a barrel with m4 extension for the upper you already have. 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. I read in Bravo company that there are 2 kinds of flat top upper. 14.5" M4 SOCOM Barrel Assembly with Sight Tower - Brownells FFL Fax: 866-721-8691. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. Change the angle so that the ramp ends at the exact same point. 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. The upper is designed to have two levels of top rails for mounting of night vision in front of scopes. Don't ever put non M4 ramped barrel on a M4 ramped upper receiver. Ideally both. 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. Whether they materialize or not depends on the direction of the mismatch. Barrel, sight and trigger work on most pistols and shotguns. 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 . Founded by Frank Galli in 2000, Snipers Hide has been offering informational videos, podcasts, and other support to its users in one location. 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). M4 16", SBN, 1:7, 5.56 NATO Barrel Specifications: - Caliber: 5.56 NATO (.223 REM) - Gas Tube: Car Add to Cart. Caught a deal on a matched barrel and bolt. You are using an out of date browser. All NFA rules apply. The barrel Throat is the second most critical component after angles and should be polished with utmost care. He had more to say and added some more engineer and gun designer speak too. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. I should have taken my own advice for once. I can probably get the upper reciever first. 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! -The Barrel MUST be removed from the Upper Receiver in order to use this Kit.-Never cut or polish the aluminum M4 Feed Ramps in your upper receiver! Home Firearms Figuring Out Feed Ramps. pictures would help. "C" stamp and CAGE code available. Married pretty well with my Seekins machined lower. Polishing the edges of the chamber mouth to remove the edges of that chamfer will. http://www.ar15fornoobs.com/wp-content/uploads/feedramps.jpg. Clear editor. If I have a rifle ramp upper and get the barrel later and coincidentally will have an m4 ramp. If it's happening regularly, check the magazines you are using for serviceability. I have looked and looked and looked. Anything else you want to share about M4 clones would be appreciated, especially when it comes to a reliable rifle. 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. Feed Ramp Polishing - How To Do It Properly? - Homestead & Prepper Most work performed while-you-wait, evening and saturday appointments available. DSA has fat top, Mueller, non feed ramp uppers for $40. Copyright 1996-2023 AR15.COM LLC. For instance I was looking at the BCM upper receiver, and it said it had M4 feed ramps machined into the upper. The first reason is that they are, indeed, better. Well, over the course of 5,000 rounds at .40 a round, you spent two grand on ammo. Description Genuine 14.5" SOCOM, carbine length gas system barrel from Colt. Supposedly you'll only notice issues with rapid/auto fire with a configuration like this. Looking For Bear Creek Arsenal Barrels Review? Any body need a anchor for a very small boat? Everything that you have on your side to make any weapons more reliable and work when it absolutely needs to is a plus. If you have a bolt that you would like to use you are welcome to ship it to us for accurate headspace. 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. 30 cal. 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. M4 feed ramps. Rear side of a CZ-75B pistol barrel showing the (here dirty) feed ramp. 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've been thinking about doing sort of an "Early Diemaco C8 carbine" clone build with a C7 style upper receiver. The mil actually only specs M4 feed ramps for use in its M4s. 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. The leading cause that leads to the development of the M4 feed ramp is the gas pressure from the carbine gas system that is increasing along with a high cyclic rate. A closer look at uppers and barrel extensions. 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. 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. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. The Differences Between an M4 and an AR15 - Music Raiser Just put it in and shoot it. 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. While I've got everything apart, I'm thinking I just want to put an M4 barrel extension on. I will check with compass lake. The ramps on the regular rifle-type extension are cut just to the edge of the extension. 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. Please allow 5~10 days for assembly and testing before ship date. The barrels also had to be modified. AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. This space is for pictures of "retro" Stoner rifles and completed or partial retro AR-15 builds, as well as discussions about either. There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. 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. So, an M4 feed ramp includes the barrel extension and the upper. That is what I tell people when they try to convince me that they need a stainless barrel instead of chrome-moly. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. 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. 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. Will my A3 upper reciever work with my M4 barrel extention.According to some or your posts they will.Thanks Bill. AR15 20 inch Upper Receiver Group (SS) w/ Handguard | BCM M4 feed ramps will extend the barrel extension and the upper receiver. The barrel blanks available are made from 416 Stainless Steel. For someone who is new at trying to understand feed ramps it helps to read a couple different explanations. 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. Buy AR 15 16" .350 Legend Nitride M4 Profile Barrel 1:16: GunBroker is the largest seller of AR15 Parts Gun Parts All: 974000728 . 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. I had seen these pix years ago and dismissed the idea of mix and match. I'm assuming that you only need the ramps from one or the other. Product Description Surplus Colt 14.5" SOCOM, carbine length gas system barrel from Colt. JavaScript is disabled. I picked up a side charging upper from Sundevil last year. 2. If you ever have an issue, then look at getting a correct barrel for the upper. Previous. Feed ramps being m4 or. ago Costs about $40-50 to have the feed ramps reprofiled from what I can gather. FN AR-15 5.56X45mm Nato . Barrel customizations are also available. Thats receivers, bolts, and on down the list of the 100 or so parts that can make up an AR-15. I am glad to know that I need to look for changes in design and the differences in the A2 and A4 feed ramp / rails. . Its easier to add feed ramps to the receiver not so easy to add them to the barrel extension. [ARCHIVED THREAD] - M4 feed ramp barrel in a non M4 ramp upper. Does NOT include pin 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. 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 ramp angles are different and changing the profile of the extension doesn't make it something it isn't.