adding m4 feed ramps to barrel

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. I've seen that pic, it is a good reference. Single Action and Double Action Which One Is Better For You? The barrel extension and the receiver both have to have the cuts. Then the manufacturer discontinued the barrel. Read Now. Do you have an AR barrel or feed ramp tip? This is one time it's better to go a little too far than to leave an edge for the . Your email address will not be published. There's a 7 degree difference between standard and M4 ramps. 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. First of Im not a gunsmith or firearms professional. 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. Is one better than the other? Dec 17, 2020. 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). Don't ever put non M4 ramped barrel on a M4 ramped upper receiver. Will my A3 upper reciever work with my M4 barrel extention.According to some or your posts they will.Thanks Bill. Modern Series Barrels. Thats why AR10s- And Scar heavies exist for. The closest brand new barrel you are likely to find is the Windham Weaponry 20 inch 1/7 twist chrome lined barrel. $101.95. I replaced the M4 feed ramp barrel with a monolithic feed ramp barrel and no more problems. I've seen uppers with and without anodizing on M4 ramps . it seems to me to be about 50/50 with and without. Copyright 2016 - 2023 by AdventureFootstep.com. 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. One new winner* is announced every week! "A Bad Day At The Range Is Better Than A Great Day Working". The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. 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. M4 16", SBN, 1:7, 5.56 NATO Barrel Specifications: - Caliber: 5.56 NATO (.223 REM) - Gas Tube: Car Add to Cart. If you want precision, dont look to the mil-spec gun, look to the one that is popular in 3-gun competitions, at Thunder Ranch, etc. Thats an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. Seems like it should work to me, but be a real challenge to keep clean and be damned ugly to boot. So, lets glide down these lines below to erase your misconceptions about them. 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. Gun smith said , not head spaced properly. I have a non ramped barrel in a ramped upper, feeds fine. Copyright 1996-2023 AR15.COM LLC. Most of barrel assemblies and upper receivers on the market now have a present of M4 feed ramps. You want them to match. are all barrels w/ m4 feed ramps?? Watch a video about our Modern Series AR barrel: They . Brevity matters. An older-version (or A2-style) feed ramp is cut only on the barrel extension itself (top). /r/ar15 is here for your favorite black gun links, build pics, questions and other tactical or practical information. I use it for hunting dogs only. A couple of times I ended up with the OK set up from the picture above. Its easier to add feed ramps to the receiver not so easy to add them to the barrel extension. I notice that's a Gibbz (or Gibbz-type) upper. Check often for fit. You can post now and register later. Only took a few minutes. Reddit and its partners use cookies and similar technologies to provide you with a better experience. Create an account to follow your favorite communities and start taking part in conversations. I didnt think anything about it having M4 feed ramps. I'm a machinist in the aerospace industry and lucky enough to have. i have the rifle barrel. Anodized red parts. 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. Rear side of a CZ-75B pistol barrel showing the (here dirty) feed ramp. 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. After two months of back and forth, cleaned up the feed ramps. The best case is to have both an upper and barrel that have the feed ramps. The Shooter's Log, is to provide informationnot opinionsto our customers and the shooting community. They offer a lower, more extensive, and smoother entry for any round of ammo, whether its necessary or not. I guess it depends on what your relationship to the necessary shop activities is. How long your barrel "lasts" depends on what your accuracy threshold is before you decide it is too bad to keep using. 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. These units actually feature the NON-F-Marked (correct) front sight base. AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. 3. Mil-spec is good for the masses, and if you want the job done it is a great start. Hasn't misfed yet, through initial break in up through 1k rounds, and that's mag length ammo. By Both. I suggest you get a rifle receiver. Interesting reading. - 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. I read in Bravo company that there are 2 kinds of flat top upper. The only other time it seems to help is if the mag is feeding the rounds with the bullet slightly angled lower than normal. 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. To conclude, the M4 feed ramps bring a lot of improvements to the AR-platform firearms. 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 Share it in the comments section. Feeds flawlessly. This has been my concern with modifying the aluminum parts. ago KrinkyDink2 9 hr. I'm assuming that you only need the ramps from one or the other. 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. It's best to have M4 ramps on both the upper and barrel. Full M4 feed ramps start on the upper and continue onto the barrel extension. 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. That puts the cartridge in a position where the extended feed ramp improves the breech-loading design. All Rights Reserved. If this is your first visit, be sure to M4 feed ramps. aaargh.. that's the setup I hate to see. Your previous content has been restored. Press J to jump to the feed. 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. A4 Complete Upper Receiver. April 23, 2014 in Rifle - Technical. 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. In military situations, it is advantageous for rifles to function with damaged, worn, or less than ideally serviceable magazines. The last is using the best and right ammo for the job. Description. Married pretty well with my Seekins machined lower. 338 and others not the .308 76251 or 6.5 creedmore which o think should have a.30cal feed ramp.? Thanks! 3. On AR9's, I understand the distance between the Mag Follower and the Feed Ramp is a known complication in the design. Man, its crazy how many of yall have absolutely no idea why you do what you do. No feed ramps. Sorta. When I function tested it the first time with live half-jacketed rounds I had the worst FTF jam I have ever experienced. If your mag catch is at Spec height, you should not have a problem with an M4 cut barrel in a rifle receiver. Recommend using a gunsmith this route too if you are not comfortable. Insert the barrel and sharpie the cut area, then use the right bit on a dremel. 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. 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. M4 Feed ramps on barrel extensions are a solid example. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. . All Rights Reserved. which is bad combo. Which Model Colt 1911 is For Me? again, Thanks. The M4 style feed ramps and barrel extension provide consistent feeding and the matte black Manganese Phosphate finish resists external corrosion and oxidation. The dimensions are different between the two, so theyd have to change some things to the feed ramps dimensions. The information provided here does not represent the views of Cheaper Than Dirt! M4 can better explain their benefit, although they help with more reliable feeding. Its not a big deal but still an important thing to remember and understand. 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. Create an account to follow your favorite communities and start taking part in conversations. When carrying out feed ramp polishing, it is crucial to prioritize the frame's angles, which is a critical part of the feed ramp. 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? Caught a deal on a matched barrel and bolt. All NFA rules apply. I didn't forsee that we'd ever see the day when replacement parts would be so hard to get. A feed ramp is a basic feature of many breech loading cartridge firearm designs. 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. Ar-15 Manufacturers Should Be Avoided: Which Should You Buy? Questions on how to install your new BA barrel? 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. My factory JP CTR-02 has the appearance of the bottom right picture in the post above, M4 barrel extension in a rifle receiver, and there is not a mark on the aluminum under the barrel extension. Polishing the edges of the chamber mouth to remove the edges of that chamfer will. 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. The M4 ramps, if I am not mistaken, were originally made to help reduce malfunctions on the M4 carbine. Clear editor. When you need to nail something you use a hammer not a wrench. Then you can get a regular rifle barrel for the upper with no ramps. M4 extension with .350 M4 style feed ramps 11 Degree Target Crown Threaded Muzzle 5/8"x24 TPI Weight: 26.5 ounces *Must have a registered ARFCOM account to win. So, I had purchased a 458 upper. To measure just where the round makes impact on the feed ramps, I did not use any sort of micrometer to measure. Little polish. 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. It gives a longer ramp that is less steep into the chamber. Can I use a barrel with M4 feed ramps with an upper that isnt M4 matched? Went back to the sellers website and found I was not the only one with problems. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. 2. 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). This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. This 20" BCM barrel is machined from SS410 stainless steel. Thank you for answering the question do well. It's an interesting question. Reddit and its partners use cookies and similar technologies to provide you with a better experience. Whether they materialize or not depends on the direction of the mismatch. Try this little exercise: 1. My experience with ARs is all A-1s. Is it worth the extra 50 bucks?" Forged 7075-T6 aluminum is harder than a bulls balls. 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. The barrel is supposed to have the M4 feed ramps. 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. pictures would help. You can put a M4 barrel and non-M4 receiver together, but you can't mismatch them the other way. The ramps on the regular rifle-type extension are cut just to the edge of the extension. -The Barrel MUST be removed from the Upper Receiver in order to use this Kit.-Never cut or polish the aluminum M4 Feed Ramps in your upper receiver! I'll probably build a pistol out of this one. I cant advise on that one folks. Does anyone have a follow up that confirms or denies my claim? The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. Your link has been automatically embedded. It's best to use rifle/rifle combo or M4/M4. I can probably get the upper reciever first. For instance I was looking at the BCM upper receiver, and it said it had M4 feed ramps machined into the upper. 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. CARBON-15 Stripped Lower Receiver This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. 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. Your discussions, feedback and comments are welcome here as long as they are relevant and insightful. 1 is a standard and the other for use with m4 feed ramp barrels. As they are becoming more and more a standard, and certainly do not do any harm to us. 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. The M4 was the first (allegedy) carbine length gas system. That's an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. In case My barrel is rifle ramp it won't be so bad after all. Product Description Surplus Colt 14.5" SOCOM, carbine length gas system barrel from Colt. 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. 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. Load a magazine with two or three rounds, lock the bolt group back on your rifle or carbine and insert the magazine. If your upper isn't showing signs of bullets rubbing on the aluminum under the barrel extension, you should be good with M4 ramps. The M-16/M4 are great weapons. You also repeated yourself. Does NOT include pin I've modified barrel/receivers even before M4 cuts came out and done some receivers when the barrels had cuts. Avoid Polishing Too Lightly Or Too Roughly By I found the article very informative. 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 Lol. 's blog. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. 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. 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. 4. And it appears that the bolt is slamming into the top of the bullet. so im thinking I might as well just get the unramp upper. And that is the important thing! This Kit is made to cut or polish the STEEL Feed Ramps on your Barrel Extension ONLY. hey bro nice to see you here!!! 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 . Barrel is medium SPR profiled barrel, threaded with a 1/2-28 thread for the AE brakes and collar. 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? 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. You must log in or register to reply here. A forum community dedicated to drag racing drivers and enthusiasts. BUT, I DO NOT TRUST MY LIFE TO THAT WEAPON. AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. This is a big tip, by the way, for pistol-caliber ARs. The Fora platform includes forum software by XenForo. Instead, I just loaded up each mag with two rounds, and pushed the rounds forward by hand until the tip of . Most work performed while-you-wait, evening and saturday appointments available. Barrel, sight and trigger work on most pistols and shotguns. It's best to use rifle/rifle combo or M4/M4. Well, over the course of 5,000 rounds at .40 a round, you spent two grand on ammo. I picked up a side charging upper from Sundevil last year. The M4 receiver feed ramps are cut at a steeper angle and, as a result, extend down into the receiver wall. 308 m5 using m4 feed ramps, which I belive are for the smaller round like. I checked what I have now. Damaged Ak front end Barrel in Trunnion with or without sight bases. The first reason is that they are, indeed, better. Seems M4 is all the rage these days. A4 Complete Upper Receiver - 7075 Forged A4 Flat Top Upper Receiver - M4 Feed Ramps Includes: - Add to Cart. Gas block area is .750 diameter. Some gun owners believe that the M4 ramps can help for some of the larger-diameter cartridges in use. ago Costs about $40-50 to have the feed ramps reprofiled from what I can gather. 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. By Yamil Sued August 6, 2021. We want you, our readers, to be able to make informed decisions. I've thought about it myself, and I'd like to see test results if any exist, displaying what reliability effect M4 ramps have on other barrel lengths.

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