Thats why AR10s- And Scar heavies exist for. All this basically means is that the ramps continue from the barrel extension down through the upper receiver tonthe magazine. I will attest that a rifle upper and a barrel with the M4 feedramps works just fine. I would just make sure to order rifle upper with rifle barrel extension or M4 upper with M4 barrel extension. 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? Sorta. 's blog. 1 is a standard and the other for use with m4 feed ramp barrels. I've seen several places say you just need a 1/8" chainsaw sharpening bit and a Dremel to fix it. 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. Gas block area is .750 diameter. Clear editor. The upper is designed to have two levels of top rails for mounting of night vision in front of scopes. M4 Feed ramps on barrel extensions are a solid example. One new winner* is announced every week! upper recievers and barrels are hard to comeby. I've modified barrel/receivers even before M4 cuts came out and done some receivers when the barrels had cuts. The best case is to have both an upper and barrel that have the feed ramps. If you have a bolt that you would like to use you are welcome to ship it to us for accurate headspace. Experts advise on 31 degrees+30 minus-zip. So I called. 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. In general, all you need to understand is that the M4 feed ramps include the barrel extension and upper receiver. 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. Seems like it should work to me, but be a real challenge to keep clean and be damned ugly to boot. 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! 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. ago Costs about $40-50 to have the feed ramps reprofiled from what I can gather. The Fora platform includes forum software by XenForo. I use it for hunting dogs only. M4 M-4 Feed Ramp Jam with 55 gr grain Bullets, Solution, Fix, AR15 AR-15 Stuck Cartridge iowaunemployment 21K views 10 years ago Comparing AR15 barrels -Faxon vs. Bear Creek arsenal-. It has 2 ramps cut into the receiver to help the rounds feed into the chamber. They offer a lower, more extensive, and smoother entry for any round of ammo, whether its necessary or not. I didn't forsee that we'd ever see the day when replacement parts would be so hard to get. All things being equal and having used both weapons extensively, Id rather have the feed Ramps. is the m4 feedramp common in barrel extensions? 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). May 17, 2008 in The Armorer. If I have a rifle ramp upper and get the barrel later and coincidentally will have an m4 ramp. so im thinking I might as well just get the unramp upper. AAC and anybody else that has any reasonable expectation of quality and reliability use an M4 feed ramp. In this episode of Gun Stock Reviews, we look at the difference between M4 Ramps and the old standard ramps of the past. You will be able to leave a comment after signing in, AR15Armory.com In military situations, it is advantageous for rifles to function with damaged, worn, or less than ideally serviceable magazines. They are better! Its highly recommended to put any AR-platform firearm together with a matching M4 barrel extension and upper receiver set. I'd rather just pay the gunsmith to make it work than hunt down another barrel/upper if possible. However Ive built numerous ar15 and lr308 rifles and pistols. 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. BUT if you find someone to grind your feed ramps and they do a good job, post it up and let us know. There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. 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. Its not a big deal but still an important thing to remember and understand. Machined from 4150 Chrome Moly Vanadium Steel and feature a QPQ corrosion resistant finish and QPQ coated M4 feed ramp extension. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. I am having a tough time finding an in-stock barrel (18 or 20 incher) with a rifle extension on it. Remember less is more, little by little. In most cases the ramps only help during full auto mode while cycling at a high rate. 30 cal. I have a 723 build (w/ C7 upper) and a 727 build (A2 upper) that use 14.5" Colt M4 barrels. Can I use a barrel with M4 feed ramps with an upper that isnt M4 matched? I'm assuming that you only need the ramps from one or the other. Well, over the course of 5,000 rounds at .40 a round, you spent two grand on ammo. What is the difference between Modern, Performance, and Premium Series Barrels? Rear side of a CZ-75B pistol barrel showing the (here dirty) feed ramp. By the time you made it work you spent more time, money, and effort than if you just bought a new barrel or upper. You must log in or register to reply here. This has been my concern with modifying the aluminum parts. 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. They guide the bullet up and into the chamber. They aid in feeding the round into the chamber from the magazine more easily, which make uppers and barrel extension matched. 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. 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. The barrel blanks available are made from 416 Stainless Steel. Thread: Adding M4 feedramps to A1/C7 upper. There is a picture of the various options, hopefully another poster can link them. I can assure you that most mods that deviate from the original design aren't 100% reliable. Upload or insert images from URL. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. If it's happening regularly, check the magazines you are using for serviceability. Pasted as rich text. They are also 1/7 twist, 4150 steel, chrome lined, and button rifled like the real deal! Feedramps, proper staking of castle nuts, forward assist (yep went there)S-happens seen it. As suggested, its best to match the upper and barrel extension no worries that way. 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. In short, if you have a Dremmel you can do it yourself. Should M4 feed ramps come with the barrel or upper? : r/ar15 - reddit It was in the last few issues of SAR. Create an account to follow your favorite communities and start taking part in conversations. Description Genuine 14.5" SOCOM, carbine length gas system barrel from Colt. AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. All Rights Reserved. Your link has been automatically embedded. These Mil-Spec M4 feed ramps are part of the original CNC manufacturing process. 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. You can always buy a non-m4 extension and have the new barrel retimed and headspaced, but it will probably cost more than a new upper receiver. 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). 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. Backing up a ton: Any and all AR-15 barrel extensions have feed ramps. These units actually feature the NON-F-Marked (correct) front sight base. http://www.ar15fornoobs.com/wp-content/uploads/feedramps.jpg. Our 6mm ARC barrel come standard with 1-7.5 Twist, M4 Feed Ramps and gas tube. I just need a little guidance on this and I'm having trouble getting good results from Google. Its also recommended you polish the ramps once youve achieved the appropriate angle. Full M4 feed ramps are on both the upper and barrel extension. Polishing the edges of the chamber mouth to remove the edges of that chamfer will. Those ramps line up with the barrel, which are cut deeper than on a rifle barrel. How long your barrel "lasts" depends on what your accuracy threshold is before you decide it is too bad to keep using. 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. 5. You have the option of barrel type, thread, fluting, finish type and to add a match bolt. However, its rare now to find an upper receiver or a ready-to-go barrel that doesnt have the M4 cuts. This 20" BCM barrel is machined from SS410 stainless steel. The M-16/M4 are great weapons. "A Bad Day At The Range Is Better Than A Great Day Working". Interesting reading. What Are M4 Feed Ramps and What Is The Benefit Of It? - Adventure Footstep [ARCHIVED THREAD] - M4 feed ramp barrel in a non M4 ramp upper. I found the article very informative. 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. I don't have much to add re: feed ramps, but. The rifle-platform M16s dont use them. Feed ramps on barrel extensions are a good example. Surplus Colt 14.5 M4 SOCOM Carbine Barrel 1/7 Twist Avoid Polishing Too Lightly Or Too Roughly Just because you can, doesn't mean you should. Colt LE6920SOCOM M4 Carbine 5.56 16.1 Barrel SOCOM Sight 30-rd Little polish. My alternative plan is to do exactly as you describe. BCM 14.5" MK2 Upper (Standard) w/ 13" MLOK Handguard - FDE Reddit and its partners use cookies and similar technologies to provide you with a better experience. . Copyright 1996-2023 AR15.COM LLC. And it appears that the bolt is slamming into the top of the bullet. They . You absolutely do not want it the other way around however. Ar-15 Manufacturers Should Be Avoided: Which Should You Buy? 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? M4 Feedramps - AR-15 Pro can the barrel extension be bought individualy? 11.5", SBN, 1:7, 5.56 NATO Barrel 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. Is it kosher to add M4 feed ramps to a standard upper to match an m4 ramped barrel? However the DD 14.5 are ideally meant to mate up with M4 style upper receiver feedramps. What is an m4 feed ramp? i have the rifle barrel. 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. Adding M4 feedramps to A1/C7 upper - M4Carbine.net pictures would help. Both. By Yamil Sued August 6, 2021. I'd rather not spent the money to get it cut to the specific length I need, FSB installed, etc just to have it immediately not work and have to sort out then or start from square one with a new 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. Is it worth the extra 50 bucks?"
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