Recommend using a gunsmith this route too if you are not comfortable. 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 . An upper without feed ramps can be used with a barrel that has them as the majority of the ramp is on the barrel extension. Powered by Invision Community. Is it worth the extra 50 bucks?" You need to match up barrels to receivers for optimum performance. It's best to use rifle/rifle combo or M4/M4. The M4 was the first (allegedy) carbine length gas system. They aid in feeding the round into the chamber from the magazine more easily, which make uppers and barrel extension matched. The ramps are in the barrel extension. Thanks! I wouldn't be concerned at all with any wear after modifying an upper receiver. It is milled out of 6061 T6. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. I have a non ramped barrel in a ramped upper, feeds fine. $101.95. Create an account to follow your favorite communities and start taking part in conversations. 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. Thanks for explaining the feed ramp topic in a couple of different ways. For those who have actually done it will a new barrel with the M4 feed ramp extension function properly with an old school rifle-type upper receiver? can the barrel extension be bought individualy? They were not intended to be super long range man killers. 4. M16's fed pretty well before the M4 feed ramps were introduced. 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. Thread: Adding M4 feedramps to A1/C7 upper. 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. Any use of this content without express written consent is prohibited. All we do is dremmel it to match - we dont remove it and grind to any specific angle. 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). Most of barrel assemblies and upper receivers on the market now have a present of M4 feed ramps. The only other time it seems to help is if the mag is feeding the rounds with the bullet slightly angled lower than normal. EDIT: Okay, I understand now! 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. I didn't forsee that we'd ever see the day when replacement parts would be so hard to get. - 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. You can put a M4 barrel and non-M4 receiver together, but you can't mismatch them the other way. The M4, and the CAR-15, before it have had similar problems like the ones you mentioned. If your upper isn't showing signs of bullets rubbing on the aluminum under the barrel extension, you should be good with M4 ramps. 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? The ramps on the regular rifle-type extension are cut just to the edge of the extension. instead of mil-spec. The M4 style feed ramps and barrel extension provide consistent feeding and the matte black Manganese Phosphate finish resists external corrosion and oxidation. The manufacturer said they had sold hundreds of barrels with out problems reported. It has 2 ramps cut into the receiver to help the rounds feed into the chamber. Brevity matters. Gas block area is .750 diameter. What is the difference between Modern, Performance, and Premium Series Barrels? 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. A feed ramp is a basic feature of many breech loading cartridge firearm designs. If you have a bolt that you would like to use you are welcome to ship it to us for accurate headspace. And that is the important thing! 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. "C" stamp and CAGE code available. Rear side of a CZ-75B pistol barrel showing the (here dirty) feed ramp. When you need to nail something you use a hammer not a wrench. Some gun owners believe that the M4 ramps can help for some of the larger-diameter cartridges in use. By Backing up a ton: The ramps on regular barrel extension are cut just to the edges, while the M4 feed ramps have deeper cuts in the M4-spec upper receiver. 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. Go slow and you'll be done in no time. 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. Clear editor. It is removeable with a special wrench and a barrel clamp/vise. Sent back again. 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. 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. Our 6.5 Grendel Black Nitride rifle barrels are made from the finest 4150 Chrome Moly Vanadium and precisely rifled for high accuracy at a great price. I just need a little guidance on this and I'm having trouble getting good results from Google. what I fear the most is having an m4 ramp upper and then getting a barrel with a rifle ramp. Feed ramps being m4 or. For the purposes of this chapter, we'll call the new one the M4, and the old one the AR. However the DD 14.5 are ideally meant to mate up with M4 style upper receiver feedramps. Feeds flawlessly. Then the manufacturer discontinued the barrel. practical_man Previous. aaargh.. that's the setup I hate to see. I had seen these pix years ago and dismissed the idea of mix and match. Jams and misfires. Factory said its fine . 3. Looking For Bear Creek Arsenal Barrels Review? 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. A closer look at uppers and barrel extensions. Olympic Arms Upper receiver with rear sight assembly and forward assist and dust cover has M4 feed ramps $260 View attachment 1016575 View attachment 1016576 What's the difference? This is one time it's better to go a little too far than to leave an edge for the . Rifles, Uppers, Lowers, Barrels, and more, [ARCHIVED THREAD] - Rifle vs m4 feed ramps, http://i135.photobucket.com/albums/q125/PursuitSS/Postings%20photos/c0d26170b75c3e6f9ea65a7d0862247e.jpg. So, what is the difference between M4 feed ramps and regular ones? This 20" BCM barrel is machined from SS410 stainless steel. The Shooter's Log, is to provide informationnot opinionsto our customers and the shooting community. I checked what I have now. M4 can better explain their benefit, although they help with more reliable feeding. Ready to drop onto a complete lower receiver. Full M4 feed ramps start on the upper and continue onto the barrel extension. I would just make sure to order rifle upper with rifle barrel extension or M4 upper with M4 barrel extension. Forged 7075-T6 aluminum is harder than a bulls balls. UPPER RECEIVER: AR-15 Mil-Spec Machined out of 7075-T6 Forged Aluminum, M4 Feed Ramps, Cerakoted Magpul Flat Dark Earth (FDE) Color with Forward Assist and Ejection Port Cover Installed BARREL: 22 inch, 223 Wylde Caliber, 4150 CMV, 1:7 Twist, Heavy Bull Barrel Profile, Straight Fluted, Melonite/Nitride Finish - made for us by Tactical Kinetics HAND Any body need a anchor for a very small boat? I am having a tough time finding an in-stock barrel (18 or 20 incher) with a rifle extension on it. They guide the bullet up and into the chamber. Another reason is that any commercial receiver and parts makers want to tool up to make upper receivers and barrel extensions, especially when shorter guns are becoming more popular. There is no way to make a carbine barrel extension out of a rifle barrel extension, period, full stop. Site towers are not "F" marked SPECS: Length- 14.5". Press question mark to learn the rest of the keyboard shortcuts. Only took a few minutes. #2. Add M4 cuts to Barrel Ext $15.00 We can modify your rifle extension to match the M4 cuts in an upper receiver. Not all mil-spec features advertised on the product information are the real mil-specs. *Must have a registered ARFCOM account to win. Inadequate knowledge about these feed ramps can lead to lots of problems with barrels because they are essential parts to guide the bullet up and into the chamber. Seems like it should work to me, but be a real challenge to keep clean and be damned ugly to boot. Those ramps line up with the barrel, which are cut deeper than on a rifle barrel. A forum community dedicated to drag racing drivers and enthusiasts. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. So I'm working on my first build, and I'm a little confused. You want them to match. You absolutely do not want it the other way around however. I have a 723 build (w/ C7 upper) and a 727 build (A2 upper) that use 14.5" Colt M4 barrels. 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. 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. Your previous content has been restored. While I've got everything apart, I'm thinking I just want to put an M4 barrel extension on. Notice how the ramp starts on the barrel extension and not in the receiver. A couple of times I ended up with the OK set up from the picture above. I should have taken my own advice for once. . JavaScript is disabled. 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. Copyright 1996-2023 AR15.COM LLC. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. 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. can you buy feed ramps individually? ago KrinkyDink2 9 hr. 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. These Mil-Spec M4 feed ramps are part of the original CNC manufacturing process. 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. 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. It's best to use rifle/rifle combo or M4/M4. 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. The barrel is supposed to have the M4 feed ramps. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. The only one I found is LaRue's upper, but it won't work with the hand guard I'm using (Geissele MKIII). Anodized red parts. 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. Single Action and Double Action Which One Is Better For You? 308 m5 using m4 feed ramps, which I belive are for the smaller round like. AAC and anybody else that has any reasonable expectation of quality and reliability use an M4 feed ramp. Remember less is more, little by little. Paste as plain text instead, Display as a link instead, 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.) . Avoid Polishing Too Lightly Or Too Roughly 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 would only add the feed ramps to the receiver if I had feeding issues, which you should not have. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. It has ran flawlessly (barring tuning of the gasblock when new) with several different brands of magazines and ammo. A4 Complete Upper Receiver - 7075 Forged A4 Flat Top Upper Receiver - M4 Feed Ramps Includes: - Add to Cart. Pasted as rich text. Can someone recommend or point me in the right direction of a good quality upper receiver for an SPR build that does not have M4 feed ramp cuts in it? You will be able to leave a comment after signing in, AR15Armory.com Whether they materialize or not depends on the direction of the mismatch. The good idea is that the round, presented at a lower plane, will contact other lower feed ramps and go right on in. Featuring hand lapped 1/8 twist rate button rifling and M4 feed ramps barrel extensions, the 410 stainless barrel gives the shooter the best balance of weight and accuracy. DSA has fat top, Mueller, non feed ramp uppers for $40. The first reason is that they are, indeed, better. All NFA rules apply. Reddit and its partners use cookies and similar technologies to provide you with a better experience. M4 Feed ramps on barrel extensions are a solid example. I built the upper using a Mega upper with a Compass Lake 18" barrel. The parts are interchangeable. Feed ramps on barrel extensions are a good example. Some barrels I see for sale say they include M4 feed ramps, and some uppers say they include them too. The last is using the best and right ammo for the job. Ballistic Performance of Federal Punch .22 LR Ammunition with the Heritage Barkeep #1063. I can probably get the upper reciever first. I have looked and looked and looked. Will my A3 upper reciever work with my M4 barrel extention.According to some or your posts they will.Thanks Bill. I'd rather just pay the gunsmith to make it work than hunt down another barrel/upper if possible. Go back to writing school. . If your mag catch is at Spec height, you should not have a problem with an M4 cut barrel in a rifle receiver. They offer a lower, more extensive, and smoother entry for any round of ammo, whether its necessary or not. Thats true overall and good to keep in mind. It gives a longer ramp that is less steep into the chamber. FFL Fax: 866-721-8691. - The Shooter's Log, 2012 SHOT Show Special Report: Del-Ton TRX Rifle and More! which is basicallly an m16a1 cut down. Its not a big deal but still an important thing to remember and understand. Does NOT include pin This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. Press question mark to learn the rest of the keyboard shortcuts. Well, over the course of 5,000 rounds at .40 a round, you spent two grand on ammo. Which Model Colt 1911 is For Me? Lol. I bought a .458 upper to go with it, with the extra internal clearance cut before anodizing. AR9 - Help diagnosing feeding issue. Given that most of us dont always have perfect access to truly genuine Mil-Spec, mil-standard parts (those actually used in issued fighting tools), were shopping based on a little part trust and a bigger part knowledge. Barrel, sight and trigger work on most pistols and shotguns. Would not feed to save its life! Some suggest taking a grinder to the extension area. Your link has been automatically embedded. I picked up a side charging upper from Sundevil last year. Full M4 feed ramps are on both the upper and barrel extension. If I have a rifle ramp upper and get the barrel later and coincidentally will have an m4 ramp. M4 ramps help in feeding in for carbine in full auto. By Yamil Sued August 6, 2021. Instead, I just loaded up each mag with two rounds, and pushed the rounds forward by hand until the tip of . 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. My experience with ARs is all A-1s. 3. Looking to spend $180-250 (depending on condition, forge mark and if a rear sight is included or not.) AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. Mil-spec is good for the masses, and if you want the job done it is a great start. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. Issues can arise when receivers and barrel extensions are mismatched. Some argue that, factually, its a step to enable a smoother feeding.
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