Semi autos run slower than full autos. I think your mistaking that with adding ramps to the receiver. There is no way to make a carbine barrel extension out of a rifle barrel extension, period, full stop. Notice how the ramp starts on the barrel extension and not in the receiver. M4 extension with .350 M4 style feed ramps 11 Degree Target Crown Threaded Muzzle 5/8"x24 TPI Weight: 26.5 ounces If you ever have an issue, then look at getting a correct barrel for the upper. 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. However, its rare now to find an upper receiver or a ready-to-go barrel that doesnt have the M4 cuts. Just because you can, doesn't mean you should. Gas block area is .750 diameter. Copyright 1996-2023 AR15.COM LLC. i have an extra brand new M4 barrel extension ramp to replace a rifle ramp. Not all mil-spec features advertised on the product information are the real mil-specs. For the purposes of this chapter, we'll call the new one the M4, and the old one the AR. 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. 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. 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. It is milled out of 6061 T6. Bullets tend to bump, snag, and stub on these guns. I cant advise on that one folks. Now, theres nothing wrong at all with a little polish on any and all feed ramps, which can not only be done fairly easily, it can be successfully done by most at home. What is the difference between Modern, Performance, and Premium Series Barrels? Buy AR 15 16" .350 Legend Nitride M4 Profile Barrel 1:16: GunBroker is the largest seller of AR15 Parts Gun Parts All: 974000728 . I should have taken my own advice for once. 410 stainless is also harder and more corrosion resistant than conventional 416 stainless found in other commercially available precision barrels. The Bullet ~ Handguns, Rifles and Shotguns, http://thearguys.com/ar-facts/m4-feed-ramps/. Factory said its fine . The good idea is that the round, presented at a lower plane, will contact other lower feed ramps and go right on in. For a better experience, please enable JavaScript in your browser before proceeding. . which is basicallly an m16a1 cut down. 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. Create an account to follow your favorite communities and start taking part in conversations. 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. The barrel extension and the receiver both have to have the cuts. Single Action and Double Action Which One Is Better For You? Hasn't misfed yet, through initial break in up through 1k rounds, and that's mag length ammo. However the DD 14.5 are ideally meant to mate up with M4 style upper receiver feedramps. Full M4 feed ramps start on the upper and continue onto the barrel extension. 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. 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! document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Owning Best Ruger SR9c Accessories Can Change Your Life. 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). 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. The tip of the cartridge rarely comes into contact with the upper receiver. 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? http://www.ar15fornoobs.com/wp-content/uploads/feedramps.jpg. 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. When I function tested it the first time with live half-jacketed rounds I had the worst FTF jam I have ever experienced. All Rights Reserved. Create Account; Log Out ; Log In ; Wishlist 0; Shopping Cart 0; Home; About Guess what? Barrel, sight and trigger work on most pistols and shotguns. But, as with anything else, this work can go too far. 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? Just put it in and shoot it. and add them to non-m4 barrels.? 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. For someone who is new at trying to understand feed ramps it helps to read a couple different explanations. 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). 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. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. They were not intended to be super long range man killers. Id just get one for that barrel and find a barrel with m4 extension for the upper you already have. What is an m4 feed ramp? 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. This is a big tip, by the way, for pistol-caliber ARs. A closer look at uppers and barrel extensions. 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. 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 $101.95. 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. 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. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. We reserve the right to edit as appropriate, delete profane, harassing, abusive and spam comments or posts, and block repeat offenders. I don't quite trust myself to give it a go, but if that's all there is to it I'm hoping they can do it for a reasonable price. Married pretty well with my Seekins machined lower. Seems counter intuitive to recommend an M4 cut upper, especially if the barrel Im looking at has the rifle feed ramp (not M4 cut). upper recievers and barrels are hard to comeby. Reddit and its partners use cookies and similar technologies to provide you with a better experience. Ideally both. 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. It's best to have M4 ramps on both the upper and barrel. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. However Ive built numerous ar15 and lr308 rifles and pistols. 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. When you need to nail something you use a hammer not a wrench. Read Now. If your upper isn't showing signs of bullets rubbing on the aluminum under the barrel extension, you should be good with M4 ramps. I have a non ramped barrel in a ramped upper, feeds fine. I wouldn't be concerned at all with any wear after modifying an upper receiver. 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. Do you have an AR barrel or feed ramp tip? I prefer them. A shorter gas tube means reduced gas pressure, and we all know what happens when there isn't enough pressure to cycle the bolt carrier group properly. I suggest you get a rifle receiver. Backing up a ton: Any and all AR-15 barrel extensions have feed ramps. Anything else you want to share about M4 clones would be appreciated, especially when it comes to a reliable rifle. Barrel customizations are also available. All this basically means is that the ramps continue from the barrel extension down through the upper receiver tonthe magazine. M4 ramps help in feeding in for carbine in full auto. Ready to drop onto a complete lower receiver. if you are OK with 3MOA, you might go 20,000 rounds! Oh well, as I tell my lovely and understanding bride, guns are relatively free. it's the ammo and training that cost real money. I just need a little guidance on this and I'm having trouble getting good results from Google. hey bro nice to see you here!!! That puts the cartridge in a position where the extended feed ramp improves the breech-loading design. 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. They aid in feeding the round into the chamber from the magazine more easily, which make uppers and barrel extension matched. Barrels are Douglas 416 stainless steel with 1-7 twist with M4 feed ramps Not saying a really good gunsmith cant do it, just that theres a bit of an involved process. Paste as plain text instead, Description Genuine 14.5" SOCOM, carbine length gas system barrel from Colt. Jams and misfires. The Shooter's Log, is to provide informationnot opinionsto our customers and the shooting community. The first reason is that they are, indeed, better. A feed ramp is a basic feature of many breech loading cartridge firearm designs. 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. There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. What's the difference? The barrel blanks available are made from 416 Stainless Steel. You want them to match. The trust part is accepting claims of USGI-spec parts actually being done to not only blueprint dimensions, but also made from the correct materials treated to the same processes. All uppers are assembled cleaned and tested before shipping. A4 Complete Upper Receiver - 7075 Forged A4 Flat Top Upper Receiver - M4 Feed Ramps Includes: - Add to Cart. In general, all you need to understand is that the M4 feed ramps include the barrel extension and upper receiver. It gives a longer ramp that is less steep into the chamber. As they are becoming more and more a standard, and certainly do not do any harm to us. Add M4 cuts to Barrel Ext $15.00 We can modify your rifle extension to match the M4 cuts in an upper receiver. I didnt think anything about it having M4 feed ramps. 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. Here you can see an upper with "rifle" feedramps. The photo shows the dents and the bolt lugs line up perfectly. Questions on how to install your new BA barrel? Machined from 4150 Chrome Moly Vanadium Steel and feature a QPQ corrosion resistant finish and QPQ coated M4 feed ramp extension. M4 Feed ramps on barrel extensions are a solid example. Forged 7075-T6 aluminum is harder than a bulls balls. In most cases the ramps only help during full auto mode while cycling at a high rate. 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 For this test, I used a Colt upper with M4 feed ramps and a SOCOM heavy 14.5 barrel, just like what is used in the military. The Mission of Cheaper Than Dirt! 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. Rifles, Uppers, Lowers, Barrels, and more, [ARCHIVED THREAD] - Rifle vs m4 feed ramps, http://i135.photobucket.com/albums/q125/PursuitSS/Postings%20photos/c0d26170b75c3e6f9ea65a7d0862247e.jpg. M4 feed ramps. Its a miracle! I can assure you that most mods that deviate from the original design aren't 100% reliable. Shorter length equates to much higher pressure in the upper receiver. To measure just where the round makes impact on the feed ramps, I did not use any sort of micrometer to measure. 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. Costs about $40-50 to have the feed ramps reprofiled from what I can gather. A4 Complete Upper Receiver. April 23, 2014 in Rifle - Technical. Either way is good and both types work great with semi auto only guns. You absolutely do not want it the other way around however. Those ramps line up with the barrel, which are cut deeper than on a rifle barrel. We want you, our readers, to be able to make informed decisions. 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). 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 It has ran flawlessly (barring tuning of the gasblock when new) with several different brands of magazines and ammo. Experts advise on 31 degrees+30 minus-zip. 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. They provide a lower, wider, and smoother entry for any round of ammo, whether its necessary or not. If a barrel comes with the feed ramps could I take them off? If you have a bolt that you would like to use you are welcome to ship it to us for accurate headspace. Any body need a anchor for a very small boat? 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. Everything that you have on your side to make any weapons more reliable and work when it absolutely needs to is a plus. Change the angle so that the ramp ends at the exact same point. 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. With the increased use of larger-diameter cased cartridges, the M4 feed ramps are proving their values when using them in those cartridges. Little polish. The mil actually only specs M4 feed ramps for use in its M4s. So there's a lot more going on with rounds bouncing up and down in the mags etc. Most work performed while-you-wait, evening and saturday appointments available. An older-version (or A2-style) feed ramp is cut only on the barrel extension itself (top). The M4 was the first (allegedy) carbine length gas system. Thanks for explaining the feed ramp topic in a couple of different ways. 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. The ramps are in the barrel extension. While I've got everything apart, I'm thinking I just want to put an M4 barrel extension on. [ARCHIVED THREAD] - M4 feed ramp barrel in a non M4 ramp upper. One new winner* is announced every week! Earlfillmore 13 hr. Pasted as rich text. Thats why AR10s- And Scar heavies exist for. I'll probably build a pistol out of this one. The M-16/M4 are great weapons. The last is using the best and right ammo for the job. JavaScript is disabled. There is a picture of the various options, hopefully another poster can link them. It is removeable with a special wrench and a barrel clamp/vise. Recommend using a gunsmith this route too if you are not comfortable. I'm planning on replacing my forearm with a Larue 13.5. 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. 338 and others not the .308 76251 or 6.5 creedmore which o think should have a.30cal feed ramp.? Also, barrel life is relative. 's blog. Your previous content has been restored. I built the upper using a Mega upper with a Compass Lake 18" barrel. Proper maintenance and lubrication. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. Snipers Hide is a community of Snipers of all kinds, focusing on long range shooting, accuracy, and ballistics. For new construction barrels only. You can put a M4 barrel and non-M4 receiver together, but you can't mismatch them the other way. The M4 receiver feed ramps are cut at a steeper angle and, as a result, extend down into the receiver wall. Sorta. this is the barrel designed and profiled for the Mark 12 Mod 0 uppers and rifles. 16" Pre-Ban M4 Profile Barrel Assembly CARBINE Gas System About Upper assembly comes completely head spaced and test fired. I didn't forsee that we'd ever see the day when replacement parts would be so hard to get. A couple of times I ended up with the OK set up from the picture above. Feeds flawlessly. It's an interesting question. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. And that the M4s and M4A1s are issued M855 which has a slight difference in bullet shape vs. the older 55gr M193 BALL. 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. The best case is to have both an upper and barrel that have the feed ramps. Display as a link instead, M4 barrel to non M4 receiver is fine, but not the other way around. I've modified barrel/receivers even before M4 cuts came out and done some receivers when the barrels had cuts. I picked up a side charging upper from Sundevil last year. Powered by Invision Community, M4-style barrel extension with Rifle-type upper. Thank you for answering the question do well. By Yamil Sued August 6, 2021. pictures would help. 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. If I can correct an issue before it's an issue that is preferred. 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. I like all my guns to be reliable. Our 6mm ARC barrel come standard with 1-7.5 Twist, M4 Feed Ramps and gas tube. Feels like a silly question now that it makes sense. Can I use a barrel with M4 feed ramps with an upper that isnt M4 matched? When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Sent back again. Finding the proper upper receiver is your best option. I notice that's a Gibbz (or Gibbz-type) upper. AR9 - Help diagnosing feeding issue. By Feed ramps being m4 or. Only took a few minutes. And that is the important thing! 30 cal. which is bad combo. The barrels also had to be modified. EDIT: Okay, I understand now! 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. Should not be too hard. How long your barrel "lasts" depends on what your accuracy threshold is before you decide it is too bad to keep using. M4 can better explain their benefit, although they help with more reliable feeding. 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. 308 m5 using m4 feed ramps, which I belive are for the smaller round like. /r/ar15 is here for your favorite black gun links, build pics, questions and other tactical or practical information. BUT if you find someone to grind your feed ramps and they do a good job, post it up and let us know.
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