This has been my concern with modifying the aluminum parts. As they are becoming more and more a standard, and certainly do not do any harm to us. If you ever have an issue, then look at getting a correct barrel for the upper. 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 had seen these pix years ago and dismissed the idea of mix and match. 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. 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. 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. Feed ramps on barrel extensions are a good example. 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. Thats receivers, bolts, and on down the list of the 100 or so parts that can make up an AR-15. Supposedly you'll only notice issues with rapid/auto fire with a configuration like this. I have a 723 build (w/ C7 upper) and a 727 build (A2 upper) that use 14.5" Colt M4 barrels. Come join the discussion about racing, builds, pro mods, hot rods, events, turbos, nitrous, superchargers, and more! Display as a link instead, Do you have an AR barrel or feed ramp tip? Looking to spend $180-250 (depending on condition, forge mark and if a rear sight is included or not.) Its a miracle! You need to match up barrels to receivers for optimum performance. Notify me of follow-up comments by email. M4 ramps help in feeding in for carbine in full auto. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. Reliability is the main concern for me when I re-barrel this rifle. 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. Would not feed to save its life! If you have a bolt that you would like to use you are welcome to ship it to us for accurate headspace. Copyright 1996-2023 AR15.COM LLC. How long your barrel "lasts" depends on what your accuracy threshold is before you decide it is too bad to keep using. The closest brand new barrel you are likely to find is the Windham Weaponry 20 inch 1/7 twist chrome lined barrel. Now move move the on deck cartridge forward to the 3/8 of inch position and again note the position of the tip of the bullet in relationship to the barrel extension. M4 Barrel Extension (M4 Feedramps) $22.95 (4 reviews) SKU: Barrel-Extension-M4 Stock Status: Quantity: Add to Wish List Description For your AR15, M16, M4. I'll probably build a pistol out of this one. You are using an out of date browser. I just need a little guidance on this and I'm having trouble getting good results from Google. I picked up a side charging upper from Sundevil last year. Pasted as rich text. I found the article very informative. 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. The M4 style feed ramps and barrel extension provide consistent feeding and the matte black Manganese Phosphate finish resists external corrosion and oxidation. So, an M4 feed ramp includes the barrel extension and the upper. A4 Complete Upper Receiver. Some argue that, factually, its a step to enable a smoother feeding. The mil actually only specs M4 feed ramps for use in its M4s. The dimensions are different between the two, so theyd have to change some things to the feed ramps dimensions. If you consider this article useful, share it with anyone in need! Was sort of worried about how it would run with an 11.5" barrel and mismatched ramps, but it sounds like it should be good to go either way. Whether they materialize or not depends on the direction of the mismatch. This gave it a longer point for the magazine to allow the rounds to come out of the magazine and feed into the chamber. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. So, I had purchased a 458 upper. A couple of times I ended up with the OK set up from the picture above. M16s and M16-A1s run at 750 rounds per minute in full auto. Married pretty well with my Seekins machined lower. Anything else you want to share about M4 clones would be appreciated, especially when it comes to a reliable rifle. Ideally both. -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! document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Owning Best Ruger SR9c Accessories Can Change Your Life. Looking For Bear Creek Arsenal Barrels Review? 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. again, Thanks. Questions on how to install your new BA barrel? It's an interesting question. The Bullet ~ Handguns, Rifles and Shotguns, http://thearguys.com/ar-facts/m4-feed-ramps/. M4 can better explain their benefit, although they help with more reliable feeding. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. Thank you for answering the question do well. 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. So, what is the difference between M4 feed ramps and regular ones? A feed ramp is a basic feature of many breech loading cartridge firearm designs. One new winner* is announced every week! Description. Thats why AR10s- And Scar heavies exist for. It's best to have M4 ramps on both the upper and barrel. Interesting reading. 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. 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. Powered by Invision Community, M4-style barrel extension with Rifle-type upper. Is it kosher to add M4 feed ramps to a standard upper to match an m4 ramped barrel? Sent back again. Create an account to follow your favorite communities and start taking part in conversations. Create an account to follow your favorite communities and start taking part in conversations. They aid in feeding the round into the chamber from the magazine more easily, which make uppers and barrel extension matched. Factory said its fine . The rifle-platform M16s dont use them. It was in the last few issues of SAR. Your previous content has been restored. upper recievers and barrels are hard to comeby. Your email address will not be published. The upper is designed to have two levels of top rails for mounting of night vision in front of scopes. Man, its crazy how many of yall have absolutely no idea why you do what you do. 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 For a better experience, please enable JavaScript in your browser before proceeding. 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. Share it in the comments section. I'm lookin for a clear definition as to what they are, and what they do to enhance a given rifle's performance? so im thinking I might as well just get the unramp upper. Issues can arise when receivers and barrel extensions are mismatched. Mil-spec is good for the masses, and if you want the job done it is a great start. practical_man You cannot paste images directly. I cant advise on that one folks. So, an M4 feed ramp includes the barrel extension and the upper. 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. You absolutely do not want it the other way around however. Description Genuine 14.5" SOCOM, carbine length gas system barrel from Colt. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. So I called. 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. 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. Copyright 1996-2023 AR15.COM LLC. In military situations, it is advantageous for rifles to function with damaged, worn, or less than ideally serviceable magazines. All this basically means is that the ramps continue from the barrel extension down through the upper receiver tonthe magazine. And it appears that the bolt is slamming into the top of the bullet. A closer look at uppers and barrel extensions. So, lets glide down these lines below to erase your misconceptions about them. You also repeated yourself. The information provided here does not represent the views of Cheaper Than Dirt! By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. Shorter length equates to much higher pressure in the upper receiver. - 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. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. Barrels are Douglas 416 stainless steel with 1-7 twist with M4 feed ramps Either way is good and both types work great with semi auto only guns. They offer a lower, more extensive, and smoother entry for any round of ammo, whether its necessary or not. Add M4 cuts to Barrel Ext $15.00 We can modify your rifle extension to match the M4 cuts in an upper receiver. I didn't forsee that we'd ever see the day when replacement parts would be so hard to get. 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. Gas block area is .750 diameter. This USGI modification was done to both the barrel extension and the upper receiver, creating a longer and steeper feed ramp. Instead, I just loaded up each mag with two rounds, and pushed the rounds forward by hand until the tip of . I have looked and looked and looked. It is removeable with a special wrench and a barrel clamp/vise. Any body need a anchor for a very small boat? The barrel Throat is the second most critical component after angles and should be polished with utmost care. Press J to jump to the feed. Higher pressure equte to parts (bcg, buffer, buffer spring, ROUNDS, etc) experiencing much higher wear/tear. Barrel Length: 16" Barrel Material: 4150V Chrome Moly Vanadium Steel Barrel Finish: Phosphate Barrel Profile: M4 Chamber: 5.56 NATO Twist Rate: 1 in 7" Extension: M4 Gas System: Carbine-Length Gas Block Type: Low Profile .750" Diameter Upper Receiver: Forged 7075 T6 Aluminum Receiver Style: M4 Flat top with feed ramps Receiver Finish: Hardcoat Anodized Both. Does NOT include pin 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. Seems M4 is all the rage these days. A4 Complete Upper Receiver - 7075 Forged A4 Flat Top Upper Receiver - M4 Feed Ramps Includes: - Add to Cart. Bullets tend to bump, snag, and stub on these guns. 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. They . The best case is to have both an upper and barrel that have the feed ramps. DSA has fat top, Mueller, non feed ramp uppers for $40. colt A1E1 733 uppers didn't have extended carbine feedramps ? Reddit and its partners use cookies and similar technologies to provide you with a better experience. Does anyone have a follow up that confirms or denies my claim? Guess what? April 23, 2014 in Rifle - Technical. "It will last 5k rounds instead of 4k. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. 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. 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. Bear Creek Arsenal Barrels - 6.5 Grendel Type 2 Barrel This Gorilla Machining AR-15 16" heavy Black Nitride 6.5 Grendel barrel has a Carbine length gas system with a 1:8 twist. Some gun owners believe that the M4 ramps can help for some of the larger-diameter cartridges in use. 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. 16" Pre-Ban M4 Profile Barrel Assembly CARBINE Gas System About Upper assembly comes completely head spaced and test fired. Modern Series Barrels. All Rights Reserved. "C" stamp and CAGE code available. what does it do?? Also, barrel life is relative. All uppers are assembled cleaned and tested before shipping. 5. The Fora platform includes forum software by XenForo. I built the upper using a Mega upper with a Compass Lake 18" barrel. Backing up a ton: Any and all AR-15 barrel extensions have feed ramps. Metal cases ammunition such as Wolf through an M4 clone? In this episode of Gun Stock Reviews, we look at the difference between M4 Ramps and the old standard ramps of the past. 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 . 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. are all barrels w/ m4 feed ramps?? May 17, 2008 in The Armorer. I will check with compass lake. A couple of times I ended up with the OK set up from the picture above. 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. By Yamil Sued August 6, 2021. Load a magazine with two or three rounds, lock the bolt group back on your rifle or carbine and insert the magazine. 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. However, they do have M4 feed-ramps which is not clone correct. There is no way to make a carbine barrel extension out of a rifle barrel extension, period, full stop. Went back to the sellers website and found I was not the only one with problems. The M4 ramps, if I am not mistaken, were originally made to help reduce malfunctions on the M4 carbine.
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