The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. Any use of this content without express written consent is prohibited. They guide the bullet up and into the chamber. 308 m5 using m4 feed ramps, which I belive are for the smaller round like. what does it do?? Is it worth the extra 50 bucks?" So, an M4 feed ramp includes the barrel extension and the upper. I had seen these pix years ago and dismissed the idea of mix and match. The only other time it seems to help is if the mag is feeding the rounds with the bullet slightly angled lower than normal. Single Action and Double Action Which One Is Better For You? 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. A couple of times I ended up with the OK set up from the picture above. Looking to spend $180-250 (depending on condition, forge mark and if a rear sight is included or not.) Other selections are available for upper, bolt and carrier, charging handle, handguards, flash hiders, and gas blocks. You absolutely do not want it the other way around however. 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. A closer look at uppers and barrel extensions. aaargh.. that's the setup I hate to see. I wouldn't be concerned at all with any wear after modifying an upper receiver. 50 bucks one way or the other on the barrel ain't squat! I wont buy a barrel that isnt a wylde 223 556 but Im only now noticing. Press question mark to learn the rest of the keyboard shortcuts. practical_man For a better experience, please enable JavaScript in your browser before proceeding. Feeds flawlessly. Should not be too hard. They . 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. I read in Bravo company that there are 2 kinds of flat top upper. The barrel is supposed to have the M4 feed ramps. However Ive built numerous ar15 and lr308 rifles and pistols. M4 16", SBN, 1:7, 5.56 NATO Barrel Specifications: - Caliber: 5.56 NATO (.223 REM) - Gas Tube: Car Add to Cart. April 23, 2014 in Rifle - Technical. So, what is the difference between M4 feed ramps and regular ones? Pasted as rich text. I built the upper using a Mega upper with a Compass Lake 18" barrel. 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? M16s and M16-A1s run at 750 rounds per minute in full auto. No feed ramps. It's not worth changing the barrel extension on an already finished barrel, getting the new barrel extension to line up correctly with the gas port will probably cost more in gunsmithing/machining fees than buying a new barrel. I'd rather just pay the gunsmith to make it work than hunt down another barrel/upper if possible. 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. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. 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. Higher pressure equte to parts (bcg, buffer, buffer spring, ROUNDS, etc) experiencing much higher wear/tear. I've been thinking about doing sort of an "Early Diemaco C8 carbine" clone build with a C7 style upper receiver. Just because you can, doesn't mean you should. Anodized red parts. If a barrel comes with the feed ramps could I take them off? 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? What's the difference? However, they do have M4 feed-ramps which is not clone correct. Went back to the sellers website and found I was not the only one with problems. You can post now and register later. There is no way to make a carbine barrel extension out of a rifle barrel extension, period, full stop. The reason I decided to write about this topic at all was because there are some mil-spec features advertised on aftermarket parts that arent even really mil-spec. M4 extension with .350 M4 style feed ramps 11 Degree Target Crown Threaded Muzzle 5/8"x24 TPI Weight: 26.5 ounces Feels like a silly question now that it makes sense. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. The ramps are in the barrel extension. You have the option of barrel type, thread, fluting, finish type and to add a match bolt. Don't ever put non M4 ramped barrel on a M4 ramped upper receiver. I have a non ramped barrel in a ramped upper, feeds fine. BUT if you find someone to grind your feed ramps and they do a good job, post it up and let us know. When I function tested it the first time with live half-jacketed rounds I had the worst FTF jam I have ever experienced. Ideally both. And that the M4s and M4A1s are issued M855 which has a slight difference in bullet shape vs. the older 55gr M193 BALL. 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? 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. You can put a M4 barrel and non-M4 receiver together, but you can't mismatch them the other way. which is bad combo. By Yamil Sued August 6, 2021. . Shorter length equates to much higher pressure in the upper receiver. Copyright 1996-2023 AR15.COM LLC. The upper is designed to have two levels of top rails for mounting of night vision in front of scopes. I am glad to know that I need to look for changes in design and the differences in the A2 and A4 feed ramp / rails. What is the difference between Modern, Performance, and Premium Series Barrels? M4 can better explain their benefit, although they help with more reliable feeding. 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 have looked and looked and looked. JavaScript is disabled. M4 feed ramps will extend the barrel extension and the upper receiver. The Mission of Cheaper Than Dirt! Most of barrel assemblies and upper receivers on the market now have a present of M4 feed ramps. I notice that's a Gibbz (or Gibbz-type) upper. To measure just where the round makes impact on the feed ramps, I did not use any sort of micrometer to measure. Press J to jump to the feed. M4 feed ramps are not an original design, they were designed for the M4 In fact, the . Insert the barrel and sharpie the cut area, then use the right bit on a dremel. Check often for fit. 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 I have a 723 build (w/ C7 upper) and a 727 build (A2 upper) that use 14.5" Colt M4 barrels. One new winner* is announced every week! 16" Pre-Ban M4 Profile Barrel Assembly CARBINE Gas System About Upper assembly comes completely head spaced and test fired. Dec 17, 2020. Its easier to add feed ramps to the receiver not so easy to add them to the barrel extension. Most work performed while-you-wait, evening and saturday appointments available. DSA has fat top, Mueller, non feed ramp uppers for $40. I bought a .458 upper to go with it, with the extra internal clearance cut before anodizing. The extension is the part at the end of the barrel that fits inside the upper. If your mag catch is at Spec height, you should not have a problem with an M4 cut barrel in a rifle receiver. So, lets glide down these lines below to erase your misconceptions about them. Its a miracle! 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. Id just get one for that barrel and find a barrel with m4 extension for the upper you already have. M4 feed ramps. 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. 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! 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. In case My barrel is rifle ramp it won't be so bad after all. The manufacturer said they had sold hundreds of barrels with out problems reported. 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. AR9 - Help diagnosing feeding issue. After two months of back and forth, cleaned up the feed ramps. 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). You need to match up barrels to receivers for optimum performance. Looking For Bear Creek Arsenal Barrels Review? For use by barrel manufacturers. Feed ramps being m4 or. Press J to jump to the feed. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. In military situations, it is advantageous for rifles to function with damaged, worn, or less than ideally serviceable magazines. The barrel extension and the receiver both have to have the cuts. pm me at BOG or PG, or get in touch with my number 09177542777 if you're interested. All Rights Reserved. The closest brand new barrel you are likely to find is the Windham Weaponry 20 inch 1/7 twist chrome lined barrel. Its also recommended you polish the ramps once youve achieved the appropriate angle. 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! You want them to match. The last is using the best and right ammo for the job. Add 3% to the total cost for credit card purchases. from my service in the 70s to my personal weapons, all of my ARs are early 1970 slab sided Colt SP1s. Copyright 2016 - 2023 by AdventureFootstep.com. M4 Feed ramps on barrel extensions are a solid example. This can lead to a rare but odd situation; barrel and receiver mismatch. Edited April 27, 2014 by Mark Gale So the engineers lowered the feed rampa into the receiver. Contents: 1 Diamond Burr (For Colt 2 Stage Ramps) 1 Cut Lube (For Diamond Burr) 1 Bullet Stone (For Reshaping . This USGI modification was done to both the barrel extension and the upper receiver, creating a longer and steeper feed ramp. Metal cases ammunition such as Wolf through an M4 clone? You will be able to leave a comment after signing in, AR15Armory.com JavaScript is disabled. Damaged Ak front end Barrel in Trunnion with or without sight bases. "A Bad Day At The Range Is Better Than A Great Day Working". 2. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. 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. By the time you made it work you spent more time, money, and effort than if you just bought a new barrel or upper. Which Model Colt 1911 is For Me? Semi autos run slower than full autos. 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. 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. Use this M4 Barrel extention with M4 feedramps. I am having a tough time finding an in-stock barrel (18 or 20 incher) with a rifle extension on it. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. 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). 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. If I have a rifle ramp upper and get the barrel later and coincidentally will have an m4 ramp. If you have an account, sign in now to post with your account. are all barrels w/ m4 feed ramps?? Forged 7075-T6 aluminum is harder than a bulls balls. Then the manufacturer discontinued the barrel. The M4 style feed ramps and barrel extension provide consistent feeding and the matte black Manganese Phosphate finish resists external corrosion and oxidation. 30 cal. Thank you for answering the question do well. Questions on how to install your new BA barrel? The rifle-platform M16s dont use them. 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. As a result, the factory machined M4 feed ramps on the receiver are hard coat anodized which adds significant strength to the aluminum. Reddit and its partners use cookies and similar technologies to provide you with a better experience. Don't forget read more information about it here! On AR9's, I understand the distance between the Mag Follower and the Feed Ramp is a known complication in the design. The M4 receiver feed ramps are cut at a steeper angle and, as a result, extend down into the receiver wall. It's best to use rifle/rifle combo or M4/M4. As they are becoming more and more a standard, and certainly do not do any harm to us. Previous. colt A1E1 733 uppers didn't have extended carbine feedramps ? Any use of this content without express written consent is prohibited. 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. I'm lookin for a clear definition as to what they are, and what they do to enhance a given rifle's performance? All Rights Reserved. Man, its crazy how many of yall have absolutely no idea why you do what you do. The angle is going to be key, alot of people attempt to mimic the angle of the barrel feed ramps, this is incorrect. Sorta. Any body need a anchor for a very small boat? Instead, I just loaded up each mag with two rounds, and pushed the rounds forward by hand until the tip of . By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. It's not worth changing the barrel extension on an already finished barrel, getting the new barrel extension to line up correctly with the gas port will probably cost more in gunsmithing/machining fees than buying a new barrel. ago Costs about $40-50 to have the feed ramps reprofiled from what I can gather. He had more to say and added some more engineer and gun designer speak too. so im thinking I might as well just get the unramp upper. 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. Watch a video about our Modern Series AR barrel: is the m4 feedramp common in barrel extensions? Display as a link instead, I use it for hunting dogs only. instead of mil-spec. [ARCHIVED THREAD] - M4 feed ramp barrel in a non M4 ramp upper. M4 barrel to non M4 receiver is fine, but not the other way around. A forum community dedicated to drag racing drivers and enthusiasts. Theres a bit more to it than just polishing. Our 6mm ARC barrel come standard with 1-7.5 Twist, M4 Feed Ramps and gas tube. 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 . Founded by Frank Galli in 2000, Snipers Hide has been offering informational videos, podcasts, and other support to its users in one location. 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. Reliability is the main concern for me when I re-barrel this rifle. My alternative plan is to do exactly as you describe. 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? True, which is why they're not even needed in semi autos. I like all my guns to be reliable. 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. I have seen it done many, MANY times and if done right, it works/functions 100% without issue. 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. M4 ramps help in feeding in for carbine in full auto. Polishing the edges of the chamber mouth to remove the edges of that chamfer will. You wrote that much to make a point that should have taken about 100 words? Absolutely nothing to do with casing diameter, or whatever other weird sht you guys imagine. Factory said its fine . http://www.ar15fornoobs.com/wp-content/uploads/feedramps.jpg. 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.
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