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). Thats true overall and good to keep in mind. 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. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. I use it for hunting dogs only. Is getting it as part of the upper better? 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). All Rights Reserved. JavaScript is disabled. The extension is the part at the end of the barrel that fits inside the upper. You absolutely do not want it the other way around however. BUT if you find someone to grind your feed ramps and they do a good job, post it up and let us know. Your discussions, feedback and comments are welcome here as long as they are relevant and insightful. Change the angle so that the ramp ends at the exact same point. A closer look at uppers and barrel extensions. Lol. "A Bad Day At The Range Is Better Than A Great Day Working". Is one better than the other? A forum community dedicated to drag racing drivers and enthusiasts. 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. Does it make a big difference? The information provided here does not represent the views of Cheaper Than Dirt! 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. Only took a few minutes. In case My barrel is rifle ramp it won't be so bad after all. Single Action and Double Action Which One Is Better For You? Don't ever put non M4 ramped barrel on a M4 ramped upper receiver. Shopping with us is absolutely safe - you never have to worry about credit card safety when shopping here Share your latest AR build or photos from the range with #RangeDayFriday for a chance to win a new firearm! M4 Feed ramps on barrel extensions are a solid example. Anodized red parts. Rifles, Uppers, Lowers, Barrels, and more, [ARCHIVED THREAD] - Rifle vs m4 feed ramps, http://i135.photobucket.com/albums/q125/PursuitSS/Postings%20photos/c0d26170b75c3e6f9ea65a7d0862247e.jpg. Oh well, as I tell my lovely and understanding bride, guns are relatively free. it's the ammo and training that cost real money. 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. So, an M4 feed ramp includes the barrel extension and the upper. Should not be too hard. He had more to say and added some more engineer and gun designer speak too. FFL Fax: 866-721-8691. This 20" BCM barrel is machined from SS410 stainless steel. Go back to writing school. Some barrels I see for sale say they include M4 feed ramps, and some uppers say they include them too. So like ORD says it is entirely 100% possible and plenty of people do it, but I would rather not do any work to this perfect barrel. I am having a tough time finding an in-stock barrel (18 or 20 incher) with a rifle extension on it. With the increased use of larger-diameter cased cartridges, the M4 feed ramps are proving their values when using them in those cartridges. If you have an account, sign in now to post with your account. Id just get one for that barrel and find a barrel with m4 extension for the upper you already have. Snipers Hide is a community of Snipers of all kinds, focusing on long range shooting, accuracy, and ballistics. I will attest that a rifle upper and a barrel with the M4 feedramps works just fine. Barrel, sight and trigger work on most pistols and shotguns. 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. Thread: Adding M4 feedramps to A1/C7 upper. The angle is going to be key, alot of people attempt to mimic the angle of the barrel feed ramps, this is incorrect. Press question mark to learn the rest of the keyboard shortcuts. 338 and others not the .308 76251 or 6.5 creedmore which o think should have a.30cal feed ramp.? Shorter length equates to much higher pressure in the upper receiver. M4 feed ramps. Pasted as rich text. Then you can get a regular rifle barrel for the upper with no ramps. Everything that you have on your side to make any weapons more reliable and work when it absolutely needs to is a plus. CARBON-15 Stripped Lower Receiver Upload or insert images from URL. First of Im not a gunsmith or firearms professional. FN AR-15 5.56X45mm Nato . The barrel is supposed to have the M4 feed ramps. You need to match up barrels to receivers for optimum performance. The only one I found is LaRue's upper, but it won't work with the hand guard I'm using (Geissele MKIII). For new construction barrels only. Higher pressure equte to parts (bcg, buffer, buffer spring, ROUNDS, etc) experiencing much higher wear/tear. Some suggest taking a grinder to the extension area. As suggested, its best to match the upper and barrel extension no worries that way. Powered by Invision Community. 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. So there's a lot more going on with rounds bouncing up and down in the mags etc. An older-version (or A2-style) feed ramp is cut only on the barrel extension itself (top). I just need a little guidance on this and I'm having trouble getting good results from Google. The difference between standard feed ramps and M4 ramps is easy to see. 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. If your upper isn't showing signs of bullets rubbing on the aluminum under the barrel extension, you should be good with M4 ramps. Clear editor. 1 is a standard and the other for use with m4 feed ramp barrels. Good call. Please allow 5~10 days for assembly and testing before ship date. 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. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. In military situations, it is advantageous for rifles to function with damaged, worn, or less than ideally serviceable magazines. 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. 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 . Does NOT include pin You can put a M4 barrel and non-M4 receiver together, but you can't mismatch them the other way. Bullets tend to bump, snag, and stub on these guns. 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. ago Costs about $40-50 to have the feed ramps reprofiled from what I can gather. colt A1E1 733 uppers didn't have extended carbine feedramps ? I'll probably build a pistol out of this one. 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. Create Account; Log Out ; Log In ; Wishlist 0; Shopping Cart 0; Home; About I cant advise on that one folks. M4 Feed ramps on barrel extensions are a solid example. These Mil-Spec M4 feed ramps are part of the original CNC manufacturing process. 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. Absolutely nothing to do with casing diameter, or whatever other weird sht you guys imagine. 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. Copyright 1996-2023 AR15.COM LLC. 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. April 23, 2014 in Rifle - Technical. I put together a second AR9 that is having a feeding issue, even if using similar parts as the first one. DSA has fat top, Mueller, non feed ramp uppers for $40. Only took a few minutes. 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. For someone who is new at trying to understand feed ramps it helps to read a couple different explanations. One new winner* is announced every week! It is removeable with a special wrench and a barrel clamp/vise. The good idea is that the round, presented at a lower plane, will contact other lower feed ramps and go right on in. After two months of back and forth, cleaned up the feed ramps. They are also 1/7 twist, 4150 steel, chrome lined, and button rifled like the real deal! I wouldn't be concerned at all with any wear after modifying an upper receiver. The first reason is that they are, indeed, better. 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. Notice how the ramp starts on the barrel extension and not in the receiver. 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 Which Model Colt 1911 is For Me? Thank you for answering the question do well. 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. Recommend using a gunsmith this route too if you are not comfortable. 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. 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.) . I've seen uppers with and without anodizing on M4 ramps . it seems to me to be about 50/50 with and without. Backing up a ton: Any and all AR-15 barrel extensions have feed ramps. *Must have a registered ARFCOM account to win. 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. Those ramps line up with the barrel, which are cut deeper than on a rifle barrel. Interesting reading. 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. "It will last 5k rounds instead of 4k. Questions on how to install your new BA barrel? Feels like a silly question now that it makes sense. Machined from 4150 Chrome Moly Vanadium Steel and feature a QPQ corrosion resistant finish and QPQ coated M4 feed ramp extension. All Rights Reserved. All comments are held for moderation and will appear after approval. It's best to use rifle/rifle combo or M4/M4. I like all my guns to be reliable. All things being equal and having used both weapons extensively, Id rather have the feed Ramps. are all barrels w/ m4 feed ramps?? 3. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. Barrel customizations are also available. By I picked up a side charging upper from Sundevil last year. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. There is no way to make a carbine barrel extension out of a rifle barrel extension, period, full stop. 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. Some, me included, have said that the M4 ramps are a help to some of the larger-diameter cartridges in use, such as 6.5 Grendel or .22 Nosler. I too built a .458 SOCOM carbine . AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. The M4 style feed ramps and barrel extension provide consistent feeding and the matte black Manganese Phosphate finish resists external corrosion and oxidation. 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. Thats an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. 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. I guess it depends on what your relationship to the necessary shop activities is. LanceRiley, $101.95. The best case is to have both an upper and barrel that have the feed ramps. If you ever have an issue, then look at getting a correct barrel for the upper. Also, barrel life is relative. Gas block area is .750 diameter. There is a picture of the various options, hopefully another poster can link them. If I was concerned with precision, I would seek out parts from well-known gun makers and customizers Baer comes to mind, Hart barrels, etc etc. M4 can better explain their benefit, although they help with more reliable feeding. 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. Create an account to follow your favorite communities and start taking part in conversations. instead of mil-spec. 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 rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. This can lead to a rare but odd situation; barrel and receiver mismatch. 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. Contents: 1 Diamond Burr (For Colt 2 Stage Ramps) 1 Cut Lube (For Diamond Burr) 1 Bullet Stone (For Reshaping . As a result, the factory machined M4 feed ramps on the receiver are hard coat anodized which adds significant strength to the aluminum. 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). Ideally both. again, Thanks. It is milled out of 6061 T6. and add them to non-m4 barrels.? For the purposes of this chapter, we'll call the new one the M4, and the old one the AR. 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. If it was some flat top + 16" FSB barrel id just swap upper/barrel, but this is a little more challenging to do that with. Seems counter intuitive to recommend an M4 cut upper, especially if the barrel Im looking at has the rifle feed ramp (not M4 cut). I would just make sure to order rifle upper with rifle barrel extension or M4 upper with M4 barrel extension. And it appears that the bolt is slamming into the top of the bullet. Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? I replaced the M4 feed ramp barrel with a monolithic feed ramp barrel and no more problems. Full M4 feed ramps start on the upper and continue onto the barrel extension. AAC and anybody else that has any reasonable expectation of quality and reliability use an M4 feed ramp. 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 What is an m4 feed ramp? Its a miracle! Remember less is more, little by little. . 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. 410 stainless is also harder and more corrosion resistant than conventional 416 stainless found in other commercially available precision barrels.
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