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? Is one better than the other? There is no way to make a carbine barrel extension out of a rifle barrel extension, period, full stop. M4 can better explain their benefit, although they help with more reliable feeding. Backing up a ton: Any and all AR-15 barrel extensions have feed ramps. Product Description Surplus Colt 14.5" SOCOM, carbine length gas system barrel from Colt. Forged 7075-T6 aluminum is harder than a bulls balls. Also, barrel life is relative. The Differences Between an M4 and an AR15 - Music Raiser 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 If you don't clean it but demand 3/4MOA you might get 1,500. ago Costs about $40-50 to have the feed ramps reprofiled from what I can gather. Reddit and its partners use cookies and similar technologies to provide you with a better experience. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. Is getting it as part of the upper better? Seems counter intuitive to recommend an M4 cut upper, especially if the barrel Im looking at has the rifle feed ramp (not M4 cut). 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). Thank you for answering the question do well. Remember less is more, little by little. However, its rare now to find an upper receiver or a ready-to-go barrel that doesnt have the M4 cuts. i have an extra brand new M4 barrel extension ramp to replace a rifle ramp. 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. Should not be too hard. aaargh.. that's the setup I hate to see. Upload or insert images from URL. I suggest you get a rifle receiver. Any use of this content without express written consent is prohibited. "It will last 5k rounds instead of 4k. Your link has been automatically embedded. You want them to match. what does it do?? can you buy feed ramps individually? . You cannot paste images directly. EDIT: Okay, I understand now! My alternative plan is to do exactly as you describe. 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. 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. 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. 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. AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. Don't ever put non M4 ramped barrel on a M4 ramped upper receiver. So, I had purchased a 458 upper. A feed ramp is a basic feature of many breech loading cartridge firearm designs. 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. For a better experience, please enable JavaScript in your browser before proceeding. Either way is good and both types work great with semi auto only guns. 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. They aid in feeding the round into the chamber from the magazine more easily, which make uppers and barrel extension matched. 410 stainless is also harder and more corrosion resistant than conventional 416 stainless found in other commercially available precision barrels. After two months of back and forth, cleaned up the feed ramps. - The Shooter's Log, 2012 SHOT Show Special Report: Del-Ton TRX Rifle and More! M4 feed ramps are not an original design, they were designed for the M4 In fact, the . BUT, I DO NOT TRUST MY LIFE TO THAT WEAPON. Create an account to follow your favorite communities and start taking part in conversations. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. Proper maintenance and lubrication. Home Firearms Figuring Out Feed Ramps. There's a 7 degree difference between standard and M4 ramps. Adding M4 feedramps to A1/C7 upper - M4Carbine.net One new winner* is announced every week! Reliability is the main concern for me when I re-barrel this rifle. LanceRiley, Married pretty well with my Seekins machined lower. We reserve the right to edit as appropriate, delete profane, harassing, abusive and spam comments or posts, and block repeat offenders. 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. So there's a lot more going on with rounds bouncing up and down in the mags etc. 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. Ar15 Upper receivers A2 and Colt A1, M4 and - Northwest Firearms We want you, our readers, to be able to make informed decisions. That is what I tell people when they try to convince me that they need a stainless barrel instead of chrome-moly. hey bro nice to see you here!!! Pasted as rich text. Barrel customizations are also available. A forum community dedicated to drag racing drivers and enthusiasts. Will my A3 upper reciever work with my M4 barrel extention.According to some or your posts they will.Thanks Bill. For instance I was looking at the BCM upper receiver, and it said it had M4 feed ramps machined into the upper. Product Details Douglas 18" Flat Dark Earth Cerakoted 416 stainless steel barrel with 1-7 twist and M4 feed ramps. You need to match up barrels to receivers for optimum performance. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. m4 feed ramps - The Armorer - AR15Armory.com Paste as plain text instead, 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. Semi autos run slower than full autos. "A Bad Day At The Range Is Better Than A Great Day Working". M4 barrel to non M4 receiver is fine, but not the other way around. 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. I will check with compass lake. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Owning Best Ruger SR9c Accessories Can Change Your Life. 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. Ar-15 Manufacturers Should Be Avoided: Which Should You Buy? Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. Everything that you have on your side to make any weapons more reliable and work when it absolutely needs to is a plus. You can post now and register later. Add 3% to the total cost for credit card purchases. The tip of the cartridge rarely comes into contact with the upper receiver. Press J to jump to the feed. They guide the bullet up and into the chamber. M4 Barrel Extension (M4 Feedramps) - Bravo Company USA By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. I built the upper using a Mega upper with a Compass Lake 18" barrel. Feed ramps on barrel extensions are a good example. The M4, and the CAR-15, before it have had similar problems like the ones you mentioned. Man, its crazy how many of yall have absolutely no idea why you do what you do. A couple of times I ended up with the OK set up from the picture above. 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. http://www.ar15fornoobs.com/wp-content/uploads/feedramps.jpg. Description. 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). The dimensions are different between the two, so theyd have to change some things to the feed ramps dimensions. To conclude, the M4 feed ramps bring a lot of improvements to the AR-platform firearms. I wouldn't be concerned at all with any wear after modifying an upper receiver. I'm a machinist in the aerospace industry and lucky enough to have. Caught a deal on a matched barrel and bolt. Come join the discussion about racing, builds, pro mods, hot rods, events, turbos, nitrous, superchargers, and more! Feed ramps being m4 or. If you consider this article useful, share it with anyone in need! FN AR-15 5.56X45mm Nato . 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). 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. 6.5 Grendel Type 2 | 16" Black Nitride | 1:8 Twist Carbine Length Gas AR-15 feed ramp issues - Rifle - Technical - Brian Enos's Forums I like all my guns to be reliable. The only one I found is LaRue's upper, but it won't work with the hand guard I'm using (Geissele MKIII). Barrel, sight and trigger work on most pistols and shotguns. M4 feed ramps. I think your mistaking that with adding ramps to the receiver. Powered by Invision Community, M4-style barrel extension with Rifle-type upper. If you ever have an issue, then look at getting a correct barrel for the upper. As a result, the factory machined M4 feed ramps on the receiver are hard coat anodized which adds significant strength to the aluminum. You need to match up barrels to receivers for optimum performance. Full M4 feed ramps start on the upper and continue onto the barrel extension.