. Feedramps, proper staking of castle nuts, forward assist (yep went there)S-happens seen it. It gives a longer ramp that is less steep into the chamber. Use this M4 Barrel extention with M4 feedramps. AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. Bullets tend to bump, snag, and stub on these guns. Only took a few minutes. Hasn't misfed yet, through initial break in up through 1k rounds, and that's mag length ammo. We reserve the right to edit as appropriate, delete profane, harassing, abusive and spam comments or posts, and block repeat offenders. They offer a lower, more extensive, and smoother entry for any round of ammo, whether its necessary or not. I found the article very informative. All Rights Reserved. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. With a larger diameter case body sitting down in the magazine, the tip of the bullet sits lower in relation to the chamber/bore centerline than with a .223-size round. what I fear the most is having an m4 ramp upper and then getting a barrel with a rifle ramp. Our 6mm ARC barrel come standard with 1-7.5 Twist, M4 Feed Ramps and gas tube. Semi autos run slower than full autos. 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. 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. Mil-spec is good for the masses, and if you want the job done it is a great start. Either way is good and both types work great with semi auto only guns. Those ramps line up with the barrel, which are cut deeper than on a rifle barrel. M16s and M16-A1s run at 750 rounds per minute in full auto. 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. So, I had purchased a 458 upper. 2. Does it make a big difference? 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. So, an M4 feed ramp includes the barrel extension and the upper. Home Firearms Figuring Out Feed Ramps. The first reason is that they are, indeed, better. 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. ago KrinkyDink2 9 hr. check out the. The extension is the part at the end of the barrel that fits inside the upper. Your discussions, feedback and comments are welcome here as long as they are relevant and insightful. May 17, 2008 in The Armorer. The ramps are in the barrel extension. Will my A3 upper reciever work with my M4 barrel extention.According to some or your posts they will.Thanks Bill. Founded by Frank Galli in 2000, Snipers Hide has been offering informational videos, podcasts, and other support to its users in one location. It is removeable with a special wrench and a barrel clamp/vise. Edited April 27, 2014 by Mark Gale Related: If you are using a Ar rifle, best green laser sight is good choice for hunting. M4 feed ramps will extend the barrel extension and the upper receiver. I recommend putting any AR-platform firearm together with a matched M4 barrel extension and upper receiver set, just because you can. Change the angle so that the ramp ends at the exact same point. FFL Fax: 866-721-8691. Your link has been automatically embedded. Ar-15 Manufacturers Should Be Avoided: Which Should You Buy? I use it for hunting dogs only. Reddit and its partners use cookies and similar technologies to provide you with a better experience. The information provided here does not represent the views of Cheaper Than Dirt! pictures would help. /r/ar15 is here for your favorite black gun links, build pics, questions and other tactical or practical information. A feed ramp is a basic feature of many breech loading cartridge firearm designs. The M4 style feed ramps and barrel extension provide consistent feeding and the matte black Manganese Phosphate finish resists external corrosion and oxidation. 1 is a standard and the other for use with m4 feed ramp barrels. 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. We want you, our readers, to be able to make informed decisions. Upper Receiver, A4, Flat Top, USGI, Numbered, AR-Stoner Upper Receiver Stripped AR-15 A3 Flat-Top Matte, Black River Tactical 16 Cold Hammer Forged Optimum Barrel Accuracy Evaluation. Its also recommended you polish the ramps once youve achieved the appropriate angle. True, which is why they're not even needed in semi autos. so it is better to have an upper reciever that's designed for non-m4 feed ramps since you can put in standard barrels right? 2. AAC and anybody else that has any reasonable expectation of quality and reliability use an M4 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. Full M4 feed ramps start on the upper and continue onto the barrel extension. As they are becoming more and more a standard, and certainly do not do any harm to us. Id just get one for that barrel and find a barrel with m4 extension for the upper you already have. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. If you ever have an issue, then look at getting a correct barrel for the upper. 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. 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. Everything that you have on your side to make any weapons more reliable and work when it absolutely needs to is a plus. Somwhere in the 1990s I believe, Colt designed the M4 feed ramps, where they took some of the material out of the upper receiver, cut two little ramps in it and then cut the ramps in the barrel extention a little further forward. This has been my concern with modifying the aluminum parts. All NFA rules apply. Here you can see an upper with "rifle" feedramps. Whether they materialize or not depends on the direction of the mismatch. Is getting it as part of the upper better? Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? In military situations, it is advantageous for rifles to function with damaged, worn, or less than ideally serviceable magazines. You want them to match. DSA has fat top, Mueller, non feed ramp uppers for $40. The upper is designed to have two levels of top rails for mounting of night vision in front of scopes. I picked up a side charging upper from Sundevil last year. "A Bad Day At The Range Is Better Than A Great Day Working". I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. Read Now. What is the difference between Modern, Performance, and Premium Series Barrels? The angle is going to be key, alot of people attempt to mimic the angle of the barrel feed ramps, this is incorrect. Looking For Bear Creek Arsenal Barrels Review? 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.) . The manufacturer said they had sold hundreds of barrels with out problems reported. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. Theres a bit more to it than just polishing. Shorter length equates to much higher pressure in the upper receiver. Powered by Invision Community, M4-style barrel extension with Rifle-type upper. I'm a machinist in the aerospace industry and lucky enough to have. - 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. 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). Barrel customizations are also available. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. I replaced the M4 feed ramp barrel with a monolithic feed ramp barrel and no more problems. 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. http://www.ar15fornoobs.com/wp-content/uploads/feedramps.jpg. 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. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. Other selections are available for upper, bolt and carrier, charging handle, handguards, flash hiders, and gas blocks. All we do is dremmel it to match - we dont remove it and grind to any specific angle. I built the upper using a Mega upper with a Compass Lake 18" barrel. Reddit and its partners use cookies and similar technologies to provide you with a better experience. One of the AR15 engineers under Gene Stoner pretty much said that the M4 isn't a good platform, especially once the gas port erodes a bit. I can still use the combination. FN AR-15 5.56X45mm Nato . ago Costs about $40-50 to have the feed ramps reprofiled from what I can gather. There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. M4 Feed ramps on barrel extensions are a solid example. Ready to drop onto a complete lower receiver. If you consider this article useful, share it with anyone in need! Earlfillmore 13 hr. pm me at BOG or PG, or get in touch with my number 09177542777 if you're interested. 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 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. The M4 was the first (allegedy) carbine length gas system. Man, its crazy how many of yall have absolutely no idea why you do what you do. Rear side of a CZ-75B pistol barrel showing the (here dirty) feed ramp. I wouldn't be concerned at all with any wear after modifying an upper receiver. The difference between standard feed ramps and M4 ramps is easy to see. 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. Any use of this content without express written consent is prohibited. I've been thinking about doing sort of an "Early Diemaco C8 carbine" clone build with a C7 style upper receiver. Share it in the comments section. However, I have seen more than a few basement gunsmith hackjobs using a dremel, some Jack Daniels/liquid courage, and an unsteady hand that have made a total, unrepairable mess of the job. Go back to writing school. For a better experience, please enable JavaScript in your browser before proceeding. . Feeds flawlessly. For someone who is new at trying to understand feed ramps it helps to read a couple different explanations. Lol. Im an old vet, now retired and looking to build some ARs as a hobby to keep me doing something that I will enjoy. Backing up a ton: Any and all AR-15 barrel extensions have feed ramps. So there's a lot more going on with rounds bouncing up and down in the mags etc. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. -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! Just put it in and shoot it. Any body need a anchor for a very small boat? All Rights Reserved. I should have taken my own advice for once. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. practical_man The M4 Style Feed ramps And Barrel Extension Provide Consistent Feeding And The Matte Black Manganese Phosphate Finish resists External Corrosion And OxidationLength: 14.70"Model: AR-15Finish: Manganese PhosphateBarrel Type: Carbine LengthBarrel Features: Chrome-LinedManufacturer: FN Mfg Number: 20-100405Model: AR-15 . Issues can arise when receivers and barrel extensions are mismatched. Caught a deal on a matched barrel and bolt. 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. With the increased use of larger-diameter cased cartridges, the M4 feed ramps are proving their values when using them in those cartridges. 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. I had seen these pix years ago and dismissed the idea of mix and match. Its easier to add feed ramps to the receiver not so easy to add them to the barrel extension. Paste as plain text instead, Product Details Douglas 18" Flat Dark Earth Cerakoted 416 stainless steel barrel with 1-7 twist and M4 feed ramps. Gas block area is .750 diameter. For new construction barrels only. BrianEnos.com As a result, the factory machined M4 feed ramps on the receiver are hard coat anodized which adds significant strength to the aluminum. 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. so im thinking I might as well just get the unramp upper. This 20" BCM barrel is machined from SS410 stainless steel. I have seen it done many, MANY times and if done right, it works/functions 100% without issue. There's no downside to having M4 feedramps on your carbine, but they are not as necessary without full auto and when using followers that will not tilt (or in a 20 AR15). This space is for pictures of "retro" Stoner rifles and completed or partial retro AR-15 builds, as well as discussions about either. The mil actually only specs M4 feed ramps for use in its M4s. Thread: Adding M4 feedramps to A1/C7 upper. M4 16", SBN, 1:7, 5.56 NATO Barrel Specifications: - Caliber: 5.56 NATO (.223 REM) - Gas Tube: Car Add to Cart. So, what is the difference between M4 feed ramps and regular ones? One new winner* is announced every week! The barrel blanks available are made from 416 Stainless Steel. No feed ramps. I have looked and looked and looked. M4 ramps help in feeding in for carbine in full auto. You will be able to leave a comment after signing in, AR15Armory.com 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. Thats an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. 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. What's the difference? Site towers are not "F" marked SPECS: Length- 14.5". BUT if you find someone to grind your feed ramps and they do a good job, post it up and let us know. M16's fed pretty well before the M4 feed ramps were introduced. "C" stamp and CAGE code available. All uppers are assembled cleaned and tested before shipping. You have the option of barrel type, thread, fluting, finish type and to add a match bolt. The Bullet ~ Handguns, Rifles and Shotguns, http://thearguys.com/ar-facts/m4-feed-ramps/. 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. However, its rare now to find an upper receiver or a ready-to-go barrel that doesnt have the M4 cuts. Should not be too hard. Press J to jump to the feed. When I function tested it the first time with live half-jacketed rounds I had the worst FTF jam I have ever experienced. But, as with anything else, this work can go too far. The barrel Throat is the second most critical component after angles and should be polished with utmost care. Thanks! Then you can get a regular rifle barrel for the upper with no ramps. I would only add the feed ramps to the receiver if I had feeding issues, which you should not have. Pasted as rich text. When carrying out feed ramp polishing, it is crucial to prioritize the frame's angles, which is a critical part of the feed ramp. We have four combinations here: From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. [ARCHIVED THREAD] - M4 feed ramp barrel in a non M4 ramp upper. If you don't clean it but demand 3/4MOA you might get 1,500. I suggest you get a rifle receiver. I checked what I have now. My experience with ARs is all A-1s. 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. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. 's blog. It is a tightly machined and polished piece of metal which guides a cartridge from the top of the magazine into the firing chamber of the barrel. 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. Feels like a silly question now that it makes sense. My alternative plan is to do exactly as you describe. Now, theres nothing wrong at all with a little polish on any and all feed ramps, which can not only be done fairly easily, it can be successfully done by most at home. Barrel, sight and trigger work on most pistols and shotguns. I don't have much to add re: feed ramps, but. I'd rather just pay the gunsmith to make it work than hunt down another barrel/upper if possible. Try this little exercise: 1. It was in the last few issues of SAR. Does NOT include pin This USGI modification was done to both the barrel extension and the upper receiver, creating a longer and steeper feed ramp. I've seen uppers with and without anodizing on M4 ramps . it seems to me to be about 50/50 with and without. 4. Since the M4 barrel is one and a half inches shorter than the minimum legal barrel you can install in an AR15, the M4 gas tube will be, of course, smaller. To conclude, the M4 feed ramps bring a lot of improvements to the AR-platform firearms. Please allow 5~10 days for assembly and testing before ship date. 3. Any use of this content without express written consent is prohibited. Most of barrel assemblies and upper receivers on the market now have a present of M4 feed ramps. 16" Pre-Ban M4 Profile Barrel Assembly CARBINE Gas System About Upper assembly comes completely head spaced and test fired. M4 Feed ramps on barrel extensions are a solid example. Forged 7075-T6 aluminum is harder than a bulls balls. Copyright 1996-2023 AR15.COM LLC. Check often for fit. Some suggest taking a grinder to the extension area. For use by barrel manufacturers. I read in Bravo company that there are 2 kinds of flat top upper. However, they do have M4 feed-ramps which is not clone correct. If your mag catch is at Spec height, you should not have a problem with an M4 cut barrel in a rifle receiver. Feed ramps being m4 or. The Fora platform includes forum software by XenForo. April 23, 2014 in Rifle - Technical. 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! So, an M4 feed ramp includes the barrel extension and the upper. It may not display this or other websites correctly. $101.95. Damaged Ak front end Barrel in Trunnion with or without sight bases. Having been in military supply, I know that what the mil-spec means: it gets the minimum job done for thousands (millions) of parts/systems. They are also 1/7 twist, 4150 steel, chrome lined, and button rifled like the real deal! Experts advise on 31 degrees+30 minus-zip. The A2's are pretty reliable guns, but trashed mags can cause them to have malfunctions also. Remember less is more, little by little. Looking for a black stripped A1 upper with non m4 feed ramps (just realized the upper I have wont work with my barrel). If it's happening regularly, check the magazines you are using for serviceability. These units actually feature the NON-F-Marked (correct) front sight base. Brevity matters. 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. The M4 ramps, if I am not mistaken, were originally made to help reduce malfunctions on the M4 carbine. Amazing what happens in a thread over a simple question. 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. I recently built an AR9 (Glock Mags) that has been running flawlessly for about 3-400rds. If your upper isn't showing signs of bullets rubbing on the aluminum under the barrel extension, you should be good with M4 ramps. The tip of the cartridge rarely comes into contact with the upper receiver. You can post now and register later. However Ive built numerous ar15 and lr308 rifles and pistols. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. I would just make sure to order rifle upper with rifle barrel extension or M4 upper with M4 barrel extension. Metal cases ammunition such as Wolf through an M4 clone? Single Action and Double Action Which One Is Better For You? Higher pressure equte to parts (bcg, buffer, buffer spring, ROUNDS, etc) experiencing much higher wear/tear. Some argue that, factually, its a step to enable a smoother feeding. In short, if you have a Dremmel you can do it yourself. 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. Barrels are Douglas 416 stainless steel with 1-7 twist with M4 feed ramps 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 I will attest that a rifle upper and a barrel with the M4 feedramps works just fine. 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). 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 CARBON-15 Stripped Lower Receiver which is bad combo. That is what I tell people when they try to convince me that they need a stainless barrel instead of chrome-moly. upper recievers and barrels are hard to comeby. I can probably get the upper reciever first. Dec 17, 2020. If a barrel comes with the feed ramps could I take them off? Jams and misfires. Moreover, telling someone that an extension can be modified, while not a lie, is nothing more than mental masturbation when your post contains a caveat for having the knowledge and proper tools. He had more to say and added some more engineer and gun designer speak too. So I'm working on my first build, and I'm a little confused. 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've seen several places say you just need a 1/8" chainsaw sharpening bit and a Dremel to fix it. 50 bucks one way or the other on the barrel ain't squat! The closest brand new barrel you are likely to find is the Windham Weaponry 20 inch 1/7 twist chrome lined barrel. 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. Supposedly you'll only notice issues with rapid/auto fire with a configuration like this. Buy AR 15 16" .350 Legend Nitride M4 Profile Barrel 1:16: GunBroker is the largest seller of AR15 Parts Gun Parts All: 974000728 .

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