In case My barrel is rifle ramp it won't be so bad after all. After two months of back and forth, cleaned up the feed ramps. I notice that's a Gibbz (or Gibbz-type) upper. This can lead to a rare but odd situation; barrel and receiver mismatch. What's the difference? i have an extra brand new M4 barrel extension ramp to replace a rifle ramp. 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? To conclude, the M4 feed ramps bring a lot of improvements to the AR-platform firearms. The Bullet ~ Handguns, Rifles and Shotguns, http://thearguys.com/ar-facts/m4-feed-ramps/. Id just get one for that barrel and find a barrel with m4 extension for the upper you already have. I use it for hunting dogs only. Go back to writing school. Notify me of follow-up comments by email. Product Details Douglas 18" Flat Dark Earth Cerakoted 416 stainless steel barrel with 1-7 twist and M4 feed ramps. I picked up a side charging upper from Sundevil last year. The difference between standard feed ramps and M4 ramps is easy to see. All uppers are assembled cleaned and tested before shipping. This is one time it's better to go a little too far than to leave an edge for the . 3. Either way is good and both types work great with semi auto only guns. I've seen several places say you just need a 1/8" chainsaw sharpening bit and a Dremel to fix it. Please allow 5~10 days for assembly and testing before ship date. It was in the last few issues of SAR. You are using an out of date browser. Some suggest taking a grinder to the extension area. JavaScript is disabled. Create an account to follow your favorite communities and start taking part in conversations. 's blog. Ready to drop onto a complete lower receiver. EDIT: Okay, I understand now! which is bad combo. All this basically means is that the ramps continue from the barrel extension down through the upper receiver tonthe magazine. practical_man pm me at BOG or PG, or get in touch with my number 09177542777 if you're interested. 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. colt A1E1 733 uppers didn't have extended carbine feedramps ? Add M4 cuts to Barrel Ext $15.00 We can modify your rifle extension to match the M4 cuts in an upper receiver. Don't ever put non M4 ramped barrel on a M4 ramped upper receiver. AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. Jams and misfires. 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.) . Mil-spec is good for the masses, and if you want the job done it is a great start. I have a 723 build (w/ C7 upper) and a 727 build (A2 upper) that use 14.5" Colt M4 barrels. It may not display this or other websites correctly. Either way is good and both types work great with semi auto only guns. It's near impossible to replace the carry handle upper I have these days, and finding a colt chrome lined 20" light weight barrel isn't a walk in the park either. Any use of this content without express written consent is prohibited. . Try this little exercise: 1. Reddit and its partners use cookies and similar technologies to provide you with a better experience. For instance I was looking at the BCM upper receiver, and it said it had M4 feed ramps machined into the upper. 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. That's an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. 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 think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. Well, over the course of 5,000 rounds at .40 a round, you spent two grand on ammo. I put together a second AR9 that is having a feeding issue, even if using similar parts as the first one. 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. 1 is a standard and the other for use with m4 feed ramp barrels. Its also recommended you polish the ramps once youve achieved the appropriate angle. Full M4 feed ramps start on the upper and continue onto the barrel extension. BrianEnos.com M4 Feed ramps on barrel extensions are a solid example. 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. M16's fed pretty well before the M4 feed ramps were introduced. If it's happening regularly, check the magazines you are using for serviceability. Oh well, as I tell my lovely and understanding bride, guns are relatively free. it's the ammo and training that cost real money. So, an M4 feed ramp includes the barrel extension and the upper. If you aren't 110% comfortable with doing the job, and you do not have all the tools and equipment to do it properly, then have a smith do it for you. Most work performed while-you-wait, evening and saturday appointments available. 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. Metal cases ammunition such as Wolf through an M4 clone? Looking For Bear Creek Arsenal Barrels Review? Machined from 4150 Chrome Moly Vanadium Steel and feature a QPQ corrosion resistant finish and QPQ coated M4 feed ramp extension. When I function tested it the first time with live half-jacketed rounds I had the worst FTF jam I have ever experienced. The barrel Throat is the second most critical component after angles and should be polished with utmost care. As they are becoming more and more a standard, and certainly do not do any harm to us. 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. AR Tech Tip - Checking M4 Ramps for overhang School of the American Rifle 84.8K subscribers Subscribe 2.9K 90K views 2 years ago AR Tech Tip - Checking M4 Ramps for overhang Show more Show more. Copyright 1996-2023 AR15.COM LLC. There is a picture of the various options, hopefully another poster can link them. Read Now. 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. #2. If your upper isn't showing signs of bullets rubbing on the aluminum under the barrel extension, you should be good with M4 ramps. Is it worth the extra 50 bucks?" All we do is dremmel it to match - we dont remove it and grind to any specific angle. hey bro nice to see you here!!! Absolutely nothing to do with casing diameter, or whatever other weird sht you guys imagine. 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. Your previous content has been restored. pictures would help. M4 feed ramps. Is one better than the other? You can run M4 cut barrels with rifle receivers, but not the other way around as it will create at catch that can hang up the bullets. Use this M4 Barrel extention with M4 feedramps. Here you can see an upper with "rifle" feedramps. 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. Those ramps line up with the barrel, which are cut deeper than on a rifle barrel. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. BUT if you find someone to grind your feed ramps and they do a good job, post it up and let us know. 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. Higher pressure equte to parts (bcg, buffer, buffer spring, ROUNDS, etc) experiencing much higher wear/tear. All comments are held for moderation and will appear after approval. And it appears that the bolt is slamming into the top of the bullet. Earlfillmore 13 hr. Both. I have seen it done many, MANY times and if done right, it works/functions 100% without issue. Sent back again. 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. I cant advise on that one folks. The Mission of Cheaper Than Dirt! Which Model Colt 1911 is For Me? DSA has fat top, Mueller, non feed ramp uppers for $40. The only other time it seems to help is if the mag is feeding the rounds with the bullet slightly angled lower than normal. 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. M4 16", SBN, 1:7, 5.56 NATO Barrel Specifications: - Caliber: 5.56 NATO (.223 REM) - Gas Tube: Car Add to Cart. An older-version (or A2-style) feed ramp is cut only on the barrel extension itself (top). 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. 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. They provide a lower, wider, and smoother entry for any round of ammo, whether its necessary or not. 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. Feels like a silly question now that it makes sense. M4 feed ramps will extend the barrel extension and the upper receiver. What is an m4 feed ramp? The dimensions are different between the two, so theyd have to change some things to the feed ramps dimensions. JavaScript is disabled. They are also 1/7 twist, 4150 steel, chrome lined, and button rifled like the real deal! Press J to jump to the feed. I'm lookin for a clear definition as to what they are, and what they do to enhance a given rifle's performance? Also, barrel life is relative. can you buy feed ramps individually? I have a non ramped barrel in a ramped upper, feeds fine. All Rights Reserved. Please be respectful of others. I suggest you get a rifle receiver. Questions on how to install your new BA barrel? Don't forget read more information about it here! Can I use a barrel with M4 feed ramps with an upper that isnt M4 matched? Rifles, Uppers, Lowers, Barrels, and more, [ARCHIVED THREAD] - Rifle vs m4 feed ramps, http://i135.photobucket.com/albums/q125/PursuitSS/Postings%20photos/c0d26170b75c3e6f9ea65a7d0862247e.jpg. I'll probably build a pistol out of this one. Get The Best Trigger Pull Gauges To Make Every Shot Count. Feeds flawlessly. You can put a M4 barrel and non-M4 receiver together, but you can't mismatch them the other way. The ramps on the regular rifle-type extension are cut just to the edge of the extension. $101.95. FN AR-15 5.56X45mm Nato . Everything that you have on your side to make any weapons more reliable and work when it absolutely needs to is a plus. 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 It gives a longer ramp that is less steep into the chamber. If you have a bolt that you would like to use you are welcome to ship it to us for accurate headspace. I can still use the combination. 338 and others not the .308 76251 or 6.5 creedmore which o think should have a.30cal feed ramp.? Recommend using a gunsmith this route too if you are not comfortable. 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? Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. Powered by Invision Community. 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. Your email address will not be published. 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. I am having a tough time finding an in-stock barrel (18 or 20 incher) with a rifle extension on it. You must log in or register to reply here. Whether they materialize or not depends on the direction of the mismatch. However the DD 14.5 are ideally meant to mate up with M4 style upper receiver feedramps. Issues can arise when receivers and barrel extensions are mismatched. 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 .