One new winner* is announced every week! is the m4 feedramp common in barrel extensions? Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. M16s and M16-A1s run at 750 rounds per minute in full auto. By Press J to jump to the feed. I'd get jams from bullets hitting the back of the upper so I took a small round file and made the M4 ramps in the upper. 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. *Must have a registered ARFCOM account to win. It is milled out of 6061 T6. Married pretty well with my Seekins machined lower. Little polish. Went back to the sellers website and found I was not the only one with problems. Its highly recommended to put any AR-platform firearm together with a matching M4 barrel extension and upper receiver set. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. All Rights Reserved. Looking to spend $180-250 (depending on condition, forge mark and if a rear sight is included or not.) 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. i have the rifle barrel. Then the manufacturer discontinued the barrel. EDIT: Okay, I understand now! 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. Your previous content has been restored. Semi autos run slower than full autos. This USGI modification was done to both the barrel extension and the upper receiver, creating a longer and steeper feed ramp. Read Now. I will attest that a rifle upper and a barrel with the M4 feedramps works just fine. Pasted as rich text. this is the barrel designed and profiled for the Mark 12 Mod 0 uppers and rifles. So, what is the difference between M4 feed ramps and regular ones? Thats receivers, bolts, and on down the list of the 100 or so parts that can make up an AR-15. 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. Just because you can, doesn't mean you should. I built the upper using a Mega upper with a Compass Lake 18" barrel. Any use of this content without express written consent is prohibited. If I have a rifle ramp upper and get the barrel later and coincidentally will have an m4 ramp. However the DD 14.5 are ideally meant to mate up with M4 style upper receiver feedramps. 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. The M4, and the CAR-15, before it have had similar problems like the ones you mentioned. This is why you can use a barrel with an extension with M4 feedramps with a receiver that does not have feedramps, but you cannot use a receiver with M4 feedramps with a barrel with an extension with rifle feedramps. colt A1E1 733 uppers didn't have extended carbine feedramps ? well.. it's kinda hard to get stuff in this part of the world. The first reason is that they are, indeed, better. Is it kosher to add M4 feed ramps to a standard upper to match an m4 ramped barrel? Either way is good and both types work great with semi auto only guns. Instead, I just loaded up each mag with two rounds, and pushed the rounds forward by hand until the tip of . 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. Check often for fit. Does it make a big difference? Does anyone have a follow up that confirms or denies my claim? Brevity matters. Reliability is the main concern for me when I re-barrel this rifle. Clear editor. It has ran flawlessly (barring tuning of the gasblock when new) with several different brands of magazines and ammo. Anything else you want to share about M4 clones would be appreciated, especially when it comes to a reliable rifle. Thanks! A forum community dedicated to drag racing drivers and enthusiasts. If your mag catch is at Spec height, you should not have a problem with an M4 cut barrel in a rifle receiver. The Fora platform includes forum software by XenForo. 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? Only took a few minutes. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. It's best to use rifle/rifle combo or M4/M4. 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. The manufacturer said they had sold hundreds of barrels with out problems reported. Copyright 1996-2023 AR15.COM LLC. Create Account; Log Out ; Log In ; Wishlist 0; Shopping Cart 0; Home; About I can still use the combination. I'd get jams from bullets hitting the back of the upper so I took a small round file and made the M4 ramps in the upper. 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. The M4 receiver feed ramps are cut at a steeper angle and, as a result, extend down into the receiver wall. A couple of times I ended up with the OK set up from the picture above. Press J to jump to the feed. Barrel customizations are also available. So, an M4 feed ramp includes the barrel extension and the upper. All Rights Reserved. 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. Ar-15 Manufacturers Should Be Avoided: Which Should You Buy? I have seen it done many, MANY times and if done right, it works/functions 100% without issue. JavaScript is disabled. 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. 2. Powered by Invision Community. 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. Ready to drop onto a complete lower receiver. I'm planning on replacing my forearm with a Larue 13.5. I've modified barrel/receivers even before M4 cuts came out and done some receivers when the barrels had cuts. By Create an account to follow your favorite communities and start taking part in conversations. 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. 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. i have an extra brand new M4 barrel extension ramp to replace a rifle ramp. When carrying out feed ramp polishing, it is crucial to prioritize the frame's angles, which is a critical part of the feed ramp. You wrote that much to make a point that should have taken about 100 words? I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. I notice that's a Gibbz (or Gibbz-type) upper. Avoid Polishing Too Lightly Or Too Roughly so im thinking I might as well just get the unramp upper. One new winner* is announced every week! There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. In military situations, it is advantageous for rifles to function with damaged, worn, or less than ideally serviceable magazines. M4 feed ramps. Feed ramps being m4 or. ago Costs about $40-50 to have the feed ramps reprofiled from what I can gather. 410 stainless is also harder and more corrosion resistant than conventional 416 stainless found in other commercially available precision barrels. The barrel is supposed to have the M4 feed ramps. Don't forget read more information about it here! I think my question would be why rifle receiver+M4 barrel is just "ok" rather than "good", unless the point is that in a carbine-gas gun M4 ramps are just considered an improvement over no ramps. I wont buy a barrel that isnt a wylde 223 556 but Im only now noticing. The Bullet ~ Handguns, Rifles and Shotguns, http://thearguys.com/ar-facts/m4-feed-ramps/. All this basically means is that the ramps continue from the barrel extension down through the upper receiver tonthe magazine. 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. AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. I'm assuming that you only need the ramps from one or the other. Upload or insert images from URL. This space is for pictures of "retro" Stoner rifles and completed or partial retro AR-15 builds, as well as discussions about either. This has been my concern with modifying the aluminum parts. Full M4 feed ramps start on the upper and continue onto the barrel extension. 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. hey bro nice to see you here!!! These Mil-Spec M4 feed ramps are part of the original CNC manufacturing process. Looking for a black stripped A1 upper with non m4 feed ramps (just realized the upper I have wont work with my barrel). Notify me of follow-up comments by email. 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. Seems like it should work to me, but be a real challenge to keep clean and be damned ugly to boot. 3. The barrel extension and the receiver both have to have the cuts. can you buy feed ramps individually? Hasn't misfed yet, through initial break in up through 1k rounds, and that's mag length ammo. You need to match up barrels to receivers for optimum performance. You also repeated yourself. Display as a link instead, instead of mil-spec. I like all my guns to be reliable. I bought a .458 upper to go with it, with the extra internal clearance cut before anodizing. I picked up a side charging upper from Sundevil last year. Jams and misfires. I don't have much to add re: feed ramps, but. Also, barrel life is relative. 3. I would only add the feed ramps to the receiver if I had feeding issues, which you should not have. The last is using the best and right ammo for the job. As they are becoming more and more a standard, and certainly do not do any harm to us. aaargh.. that's the setup I hate to see. Everything that you have on your side to make any weapons more reliable and work when it absolutely needs to is a plus. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. FFL Fax: 866-721-8691. Product Details Douglas 18" Flat Dark Earth Cerakoted 416 stainless steel barrel with 1-7 twist and M4 feed ramps. Proper maintenance and lubrication. I just need a little guidance on this and I'm having trouble getting good results from Google. It's best to use rifle/rifle combo or M4/M4. Try this little exercise: 1. BrianEnos.com 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. 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. 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. I guess it depends on what your relationship to the necessary shop activities is. I use it for hunting dogs only. 30 cal. With the increased use of larger-diameter cased cartridges, the M4 feed ramps are proving their values when using them in those cartridges. For a better experience, please enable JavaScript in your browser before proceeding. 's blog. pictures would help. Share it in the comments section. 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). Your email address will not be published. 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. Well, over the course of 5,000 rounds at .40 a round, you spent two grand on ammo. 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? Insert the barrel and sharpie the cut area, then use the right bit on a dremel. Is one better than the other? 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. M4 can better explain their benefit, although they help with more reliable feeding. The closest brand new barrel you are likely to find is the Windham Weaponry 20 inch 1/7 twist chrome lined barrel. All uppers are assembled cleaned and tested before shipping. You can put a M4 barrel and non-M4 receiver together, but you can't mismatch them the other way. Is it worth the extra 50 bucks?" The parts are interchangeable. The M4 was the first (allegedy) carbine length gas system. BEFORE YOU GO MODIFYING IT, check your headspace.I have a Gibbz upper in my junk drawer because the upper -- for some reason -- wouldn't allow a perfectly good bolt (as checked by Criterion) to headspace correctly on a Criterion barrel, with the bolt installed in the carrier. Gun smith said , not head spaced properly. After two months of back and forth, cleaned up the feed ramps. 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 Higher pressure equte to parts (bcg, buffer, buffer spring, ROUNDS, etc) experiencing much higher wear/tear. The M4 style feed ramps and barrel extension provide consistent feeding and the matte black Manganese Phosphate finish resists external corrosion and oxidation. Interesting reading. 5. Reddit and its partners use cookies and similar technologies to provide you with a better experience. Costs about $40-50 to have the feed ramps reprofiled from what I can gather. /r/ar15 is here for your favorite black gun links, build pics, questions and other tactical or practical information. If you have a bolt that you would like to use you are welcome to ship it to us for accurate headspace. I'll probably build a pistol out of this one. Your link has been automatically embedded. Editors Note: This article was originally published in January of 2019. 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. 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? Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? Rifles, Uppers, Lowers, Barrels, and more, [ARCHIVED THREAD] - Rifle vs m4 feed ramps, http://i135.photobucket.com/albums/q125/PursuitSS/Postings%20photos/c0d26170b75c3e6f9ea65a7d0862247e.jpg. 308 m5 using m4 feed ramps, which I belive are for the smaller round like. There's no downside to having M4 feedramps on your carbine, but they are not as necessary without full auto and when using followers that will not tilt (or in a 20 AR15). Absolutely nothing to do with casing diameter, or whatever other weird sht you guys imagine. . However, if youre wanting to rebarrel a non-M4-cut upper with an M4 feed-ramp equipped barrel, or going the other direction: you have a new upper thats been relieved to fit with the M4 ramps, and a non-M4-cut barrel extension, and that wont work! Anodized red parts. AR9 - Help diagnosing feeding issue. I didnt think anything about it having M4 feed ramps. When you need to nail something you use a hammer not a wrench. I recently built an AR9 (Glock Mags) that has been running flawlessly for about 3-400rds. Ballistic Performance of Federal Punch .22 LR Ammunition with the Heritage Barkeep #1063. Load a magazine with two or three rounds, lock the bolt group back on your rifle or carbine and insert the magazine. Should not be too hard. 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 (they're lowered). My alternative plan is to do exactly as you describe. 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'd rather just pay the gunsmith to make it work than hunt down another barrel/upper if possible. Will my A3 upper reciever work with my M4 barrel extention.According to some or your posts they will.Thanks Bill. That is what I tell people when they try to convince me that they need a stainless barrel instead of chrome-moly. Please be respectful of others. practical_man 16" Pre-Ban M4 Profile Barrel Assembly CARBINE Gas System About Upper assembly comes completely head spaced and test fired. Other selections are available for upper, bolt and carrier, charging handle, handguards, flash hiders, and gas blocks. Backing up a ton: Any and all AR-15 barrel extensions have feed ramps. Create an account to follow your favorite communities and start taking part in conversations. Finding the proper upper receiver is your best option. Damaged Ak front end Barrel in Trunnion with or without sight bases. 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. AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. The rifle-platform M16s dont use them. Seems counter intuitive to recommend an M4 cut upper, especially if the barrel Im looking at has the rifle feed ramp (not M4 cut). Modern Series Barrels. Metal cases ammunition such as Wolf through an M4 clone? Installing a Luth-AR Rifle Buffer Tube and an A2 Stock #1041. Barrel, sight and trigger work on most pistols and shotguns. Feed ramps on barrel extensions are a good example. I have a 723 build (w/ C7 upper) and a 727 build (A2 upper) that use 14.5" Colt M4 barrels. can the barrel extension be bought individualy? 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. While I've got everything apart, I'm thinking I just want to put an M4 barrel extension on. When I function tested it the first time with live half-jacketed rounds I had the worst FTF jam I have ever experienced. We want you, our readers, to be able to make informed decisions. By Yamil Sued August 6, 2021. Thats true overall and good to keep in mind. No feed ramps. M4 16", SBN, 1:7, 5.56 NATO Barrel Specifications: - Caliber: 5.56 NATO (.223 REM) - Gas Tube: Car Add to Cart. 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? An older-version (or A2-style) feed ramp is cut only on the barrel extension itself (top). 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 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. In this episode of Gun Stock Reviews, we look at the difference between M4 Ramps and the old standard ramps of the past. BUT if you find someone to grind your feed ramps and they do a good job, post it up and let us know. 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. You must log in or register to reply here. 2. 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. The Mission of Cheaper Than Dirt! Do you have an AR barrel or feed ramp tip? The best case is to have both an upper and barrel that have the feed ramps. what does it do?? DSA has fat top, Mueller, non feed ramp uppers for $40. 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. M4 Feed ramps on barrel extensions are a solid example. The A2's are pretty reliable guns, but trashed mags can cause them to have malfunctions also. "It will last 5k rounds instead of 4k. 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 To measure just where the round makes impact on the feed ramps, I did not use any sort of micrometer to measure. from my service in the 70s to my personal weapons, all of my ARs are early 1970 slab sided Colt SP1s. The Shooter's Log, is to provide informationnot opinionsto our customers and the shooting community. If it's happening regularly, check the magazines you are using for serviceability. 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. I've seen uppers with and without anodizing on M4 ramps . it seems to me to be about 50/50 with and without. They offer a lower, more extensive, and smoother entry for any round of ammo, whether its necessary or not. 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. 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 They . This Kit is made to cut or polish the STEEL Feed Ramps on your Barrel Extension ONLY. I like getting another Upper idea then you could end up with two rifles! I read in Bravo company that there are 2 kinds of flat top upper. 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. Thanks. Just put it in and shoot it. We reserve the right to edit as appropriate, delete profane, harassing, abusive and spam comments or posts, and block repeat offenders. For new construction barrels only. As suggested, its best to match the upper and barrel extension no worries that way. The angle is going to be key, alot of people attempt to mimic the angle of the barrel feed ramps, this is incorrect. All things being equal and having used both weapons extensively, Id rather have the feed Ramps. All NFA rules apply. 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. . Whether they materialize or not depends on the direction of the mismatch. Most of barrel assemblies and upper receivers on the market now have a present of M4 feed ramps.
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