adding m4 feed ramps to barrel

An older-version (or A2-style) feed ramp is cut only on the barrel extension itself (top). The manufacturer said they had sold hundreds of barrels with out problems reported. The M4 style feed ramps and barrel extension provide consistent feeding and the matte black Manganese Phosphate finish resists external corrosion and oxidation. AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. Here you can see an upper with "rifle" feedramps. In short, if you have a Dremmel you can do it yourself. Mil-spec is good for the masses, and if you want the job done it is a great start. When carrying out feed ramp polishing, it is crucial to prioritize the frame's angles, which is a critical part of the feed ramp. And it appears that the bolt is slamming into the top of the bullet. which is bad combo. They provide a lower, wider, and smoother entry for any round of ammo, whether its necessary or not. That's an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. Went back to the sellers website and found I was not the only one with problems. By Yamil Sued August 6, 2021. This 20" BCM barrel is machined from SS410 stainless steel. 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. There is no way to make a carbine barrel extension out of a rifle barrel extension, period, full stop. The Fora platform includes forum software by XenForo. Will my A3 upper reciever work with my M4 barrel extention.According to some or your posts they will.Thanks Bill. I have a non ramped barrel in a ramped upper, feeds fine. Caught a deal on a matched barrel and bolt. I would just make sure to order rifle upper with rifle barrel extension or M4 upper with M4 barrel extension. For a better experience, please enable JavaScript in your browser before proceeding. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Snipers Hide is a community of Snipers of all kinds, focusing on long range shooting, accuracy, and ballistics. You can modify the upper, but bear in mind that the un-anodized aluminum surface will be very soft and prone to wear if your particular bullet hits it frequently. The photo shows the dents and the bolt lugs line up perfectly. i have the rifle barrel. After two months of back and forth, cleaned up the feed ramps. Barrel customizations are also available. The rifle-platform M16s dont use them. 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 These units actually feature the NON-F-Marked (correct) front sight base. They are also 1/7 twist, 4150 steel, chrome lined, and button rifled like the real deal! M4 extension with .350 M4 style feed ramps 11 Degree Target Crown Threaded Muzzle 5/8"x24 TPI Weight: 26.5 ounces For use by barrel manufacturers. Brevity matters. Again, youll find plenty of videos on spooling up hand grinders to remedy feed ramp and ejection port issues with these larger cartridges, but I strongly suggest going factory-done aftermarket. Its highly recommended to put any AR-platform firearm together with a matching M4 barrel extension and upper receiver set. In case My barrel is rifle ramp it won't be so bad after all. We're a little past that point as I already own both the barrel and receiver, both of which cant easily be replaced or swapped for a decent price. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. The closest brand new barrel you are likely to find is the Windham Weaponry 20 inch 1/7 twist chrome lined barrel. So, an M4 feed ramp includes the barrel extension and the upper. It's best to use rifle/rifle combo or M4/M4. JavaScript is disabled. You have a rifle barrel. 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. I've modified barrel/receivers even before M4 cuts came out and done some receivers when the barrels had cuts. The M4, and the CAR-15, before it have had similar problems like the ones you mentioned. Copyright 2016 - 2023 by AdventureFootstep.com. Amazing what happens in a thread over a simple question. UPPER RECEIVER: AR-15 Mil-Spec Machined out of 7075-T6 Forged Aluminum, M4 Feed Ramps, Cerakoted Magpul Flat Dark Earth (FDE) Color with Forward Assist and Ejection Port Cover Installed BARREL: 22 inch, 223 Wylde Caliber, 4150 CMV, 1:7 Twist, Heavy Bull Barrel Profile, Straight Fluted, Melonite/Nitride Finish - made for us by Tactical Kinetics HAND Interesting reading. Don't ever put non M4 ramped barrel on a M4 ramped upper receiver. The good idea is that the round, presented at a lower plane, will contact other lower feed ramps and go right on in. Modern Series Barrels. M4 feed ramps will extend the barrel extension and the upper receiver. 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). I notice that's a Gibbz (or Gibbz-type) upper. Read Now. Lol. Costs about $40-50 to have the feed ramps reprofiled from what I can gather. Thank you for answering the question do well. Instead, I just loaded up each mag with two rounds, and pushed the rounds forward by hand until the tip of . Seems M4 is all the rage these days. Any use of this content without express written consent is prohibited. 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. BUT, I DO NOT TRUST MY LIFE TO THAT WEAPON. I checked what I have now. Thats an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. He had more to say and added some more engineer and gun designer speak too. Man, its crazy how many of yall have absolutely no idea why you do what you do. All Rights Reserved. In general, all you need to understand is that the M4 feed ramps include the barrel extension and upper receiver. Site towers are not "F" marked SPECS: Length- 14.5". Description Genuine 14.5" SOCOM, carbine length gas system barrel from Colt. A couple of times I ended up with the OK set up from the picture above. Notify me of follow-up comments by email. Little polish. 4. The angle is going to be key, alot of people attempt to mimic the angle of the barrel feed ramps, this is incorrect. This Kit is made to cut or polish the STEEL Feed Ramps on your Barrel Extension ONLY. They are better! The barrel extension and the receiver both have to have the cuts. While I've got everything apart, I'm thinking I just want to put an M4 barrel extension on. So, I had purchased a 458 upper. The barrel blanks available are made from 416 Stainless Steel. Featuring hand lapped 1/8 twist rate button rifling and M4 feed ramps barrel extensions, the 410 stainless barrel gives the shooter the best balance of weight and accuracy. I've seen uppers with and without anodizing on M4 ramps . it seems to me to be about 50/50 with and without. pictures would help. 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. Full M4 feed ramps start on the upper and continue onto the barrel extension. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. What is the difference between Modern, Performance, and Premium Series Barrels? 5. M16s and M16-A1s run at 750 rounds per minute in full auto. 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. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. When I function tested it the first time with live half-jacketed rounds I had the worst FTF jam I have ever experienced. 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). Any body need a anchor for a very small boat? 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. Which Model Colt 1911 is For Me? AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. Both. 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. It has ran flawlessly (barring tuning of the gasblock when new) with several different brands of magazines and ammo. Is it worth the extra 50 bucks?" Either way is good and both types work great with semi auto only guns. However, its rare now to find an upper receiver or a ready-to-go barrel that doesnt have the M4 cuts. I use it for hunting dogs only. 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. This space is for pictures of "retro" Stoner rifles and completed or partial retro AR-15 builds, as well as discussions about either. Installing a Luth-AR Rifle Buffer Tube and an A2 Stock #1041. All we do is dremmel it to match - we dont remove it and grind to any specific angle. well.. it's kinda hard to get stuff in this part of the world. So I'm thinking I ought to have M4 ramps in the gun because based on what I've read: Rifle receiver+M4 barrel = "OK" but not ideal. Does it make a big difference? 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. upper recievers and barrels are hard to comeby. Your discussions, feedback and comments are welcome here as long as they are relevant and insightful. Founded by Frank Galli in 2000, Snipers Hide has been offering informational videos, podcasts, and other support to its users in one location. Reach in through the ejection port and slide the on deck cartridge about 1/4 inch forward and observe the tip of the bullet in relationship to the barrel extension. Anything else you want to share about M4 clones would be appreciated, especially when it comes to a reliable rifle. But, as with anything else, this work can go too far. I'll probably build a pistol out of this one. Notice how the ramp starts on the barrel extension and not in the receiver. So there's a lot more going on with rounds bouncing up and down in the mags etc. You will be able to leave a comment after signing in, AR15Armory.com Powered by Invision Community, M4-style barrel extension with Rifle-type upper. There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. Bullets tend to bump, snag, and stub on these guns. Theres a bit more to it than just polishing. The M-16/M4 are great weapons. They guide the bullet up and into the chamber. When you need to nail something you use a hammer not a wrench. 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. Press J to jump to the feed. So, an M4 feed ramp includes the barrel extension and the upper. I'm assuming that you only need the ramps from one or the other. 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. A forum community dedicated to drag racing drivers and enthusiasts. Does anyone have a follow up that confirms or denies my claim? I would only add the feed ramps to the receiver if I had feeding issues, which you should not have. I can probably get the upper reciever first. 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. Then you can get a regular rifle barrel for the upper with no ramps. M4 barrel to non M4 receiver is fine, but not the other way around. 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. Semi autos run slower than full autos. 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. Don't forget read more information about it here! Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. 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. Share it in the comments section. Press question mark to learn the rest of the keyboard shortcuts. I read in Bravo company that there are 2 kinds of flat top upper. DSA has fat top, Mueller, non feed ramp uppers for $40. 's blog. 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 . [ARCHIVED THREAD] - M4 feed ramp barrel in a non M4 ramp upper. Copyright 1996-2023 AR15.COM LLC. We want you, our readers, to be able to make informed decisions. I prefer them. 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. Feed ramps being m4 or. Thanks. JavaScript is disabled. Good call. Thats true overall and good to keep in mind. 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. For someone who is new at trying to understand feed ramps it helps to read a couple different explanations. I'm planning on replacing my forearm with a Larue 13.5. The Shooter's Log, is to provide informationnot opinionsto our customers and the shooting community. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. They offer a lower, more extensive, and smoother entry for any round of ammo, whether its necessary or not. Should not be too hard. The only one I found is LaRue's upper, but it won't work with the hand guard I'm using (Geissele MKIII). 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. Shorter length equates to much higher pressure in the upper receiver. Thanks! For this test, I used a Colt upper with M4 feed ramps and a SOCOM heavy 14.5 barrel, just like what is used in the military. They were not intended to be super long range man killers. which is basicallly an m16a1 cut down.

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