adding m4 feed ramps to barrel

So, what is the difference between M4 feed ramps and regular ones? Lol. FN AR-15 5.56X45mm Nato . SKU: BCM-URG-M4-16 Features: M4 Feed Ramp Barrel Extension Caliber: 5.56 NATO Barrel Length: 16in Barrel Style: Standard Handguard: None BCM M4 Handguards (Double Heat Shield) - Black + $15.00 PKMR (Polymer KeyMod Rail) Carbine Length - Black + $24.95 PKMR (Polymer KeyMod Rail) Carbine Length - Flat Dark Earth + $24.95 Stock Status: Out of stock 3. Is getting it as part of the upper better? By Just put it in and shoot it. The M4 style feed ramps and barrel extension provide consistent feeding and the matte black Manganese Phosphate finish resists external corrosion and oxidation. "A Bad Day At The Range Is Better Than A Great Day Working". 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. Feeds flawlessly. A feed ramp is a basic feature of many breech loading cartridge firearm designs. BrianEnos.com We have four combinations here: Press J to jump to the feed. If you have an account, sign in now to post with your account. Semi autos run slower than full autos. I've seen uppers with and without anodizing on M4 ramps . it seems to me to be about 50/50 with and without. ago Costs about $40-50 to have the feed ramps reprofiled from what I can gather. I can probably get the upper reciever first. Go back to writing school. . AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. Share it in the comments section. When I function tested it the first time with live half-jacketed rounds I had the worst FTF jam I have ever experienced. #2. Reddit and its partners use cookies and similar technologies to provide you with a better experience. It has 2 ramps cut into the receiver to help the rounds feed into the chamber. 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. Jams and misfires. It's an interesting question. 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. Higher pressure equte to parts (bcg, buffer, buffer spring, ROUNDS, etc) experiencing much higher wear/tear. Its also recommended you polish the ramps once youve achieved the appropriate angle. 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. M4 ramps help in feeding in for carbine in full auto. 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. No need to alter the upper. Either way is good and both types work great with semi auto only guns. Amazing what happens in a thread over a simple question. Is it kosher to add M4 feed ramps to a standard upper to match an m4 ramped barrel? - The Shooter's Log, 2012 SHOT Show Special Report: Del-Ton TRX Rifle and More! I've seen several places say you just need a 1/8" chainsaw sharpening bit and a Dremel to fix it. Thread: Adding M4 feedramps to A1/C7 upper. So the engineers lowered the feed rampa into the receiver. Add 3% to the total cost for credit card purchases. 4. Polishing the edges of the chamber mouth to remove the edges of that chamfer will. I have a non ramped barrel in a ramped upper, feeds fine. 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. 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. Thats why AR10s- And Scar heavies exist for. If it's happening regularly, check the magazines you are using for serviceability. You can run M4 cut barrels with rifle receivers, but not the other way around as it will create at catch that can hang up the bullets. For the purposes of this chapter, we'll call the new one the M4, and the old one the AR. Create an account to follow your favorite communities and start taking part in conversations. The angle is going to be key, alot of people attempt to mimic the angle of the barrel feed ramps, this is incorrect. You have a rifle barrel. CARBON-15 Stripped Lower Receiver 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 only one I found is LaRue's upper, but it won't work with the hand guard I'm using (Geissele MKIII). 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 50 bucks one way or the other on the barrel ain't squat! So, an M4 feed ramp includes the barrel extension and the upper. He had more to say and added some more engineer and gun designer speak too. The M-16/M4 are great weapons. Just because you can, doesn't mean you should. 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. Site towers are not "F" marked SPECS: Length- 14.5". FFL Fax: 866-721-8691. Its a miracle! /r/ar15 is here for your favorite black gun links, build pics, questions and other tactical or practical information. Any use of this content without express written consent is prohibited. When you need to nail something you use a hammer not a wrench. 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. The M4 was the first (allegedy) carbine length gas system. 30 cal. 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. 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. Ar-15 Manufacturers Should Be Avoided: Which Should You Buy? 2. 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. There are now thousands of upper receivers and ready-to-use barrels that have the cuts 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. Seems M4 is all the rage these days. Please be respectful of others. Well, over the course of 5,000 rounds at .40 a round, you spent two grand on ammo. It's best to use rifle/rifle combo or M4/M4. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. I have looked and looked and looked. They guide the bullet up and into the chamber. 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. 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. -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 can assure you that most mods that deviate from the original design aren't 100% reliable. Editors Note: This article was originally published in January of 2019. Whether they materialize or not depends on the direction of the mismatch. JavaScript is disabled. In this episode of Gun Stock Reviews, we look at the difference between M4 Ramps and the old standard ramps of the past. Forged 7075-T6 aluminum is harder than a bulls balls. 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. 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). I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. Anodized red parts. 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. Reddit and its partners use cookies and similar technologies to provide you with a better experience. Thats true overall and good to keep in mind. Backing up a ton: Any and all AR-15 barrel extensions have feed ramps. M4 extension with .350 M4 style feed ramps 11 Degree Target Crown Threaded Muzzle 5/8"x24 TPI Weight: 26.5 ounces Buy AR 15 16" .350 Legend Nitride M4 Profile Barrel 1:16: GunBroker is the largest seller of AR15 Parts Gun Parts All: 974000728 . 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. . Those ramps line up with the barrel, which are cut deeper than on a rifle barrel. If I have a rifle ramp upper and get the barrel later and coincidentally will have an m4 ramp. 410 stainless is also harder and more corrosion resistant than conventional 416 stainless found in other commercially available precision barrels. Metal cases ammunition such as Wolf through an M4 clone? Full M4 feed ramps start on the upper and continue onto the barrel extension. Oh well, as I tell my lovely and understanding bride, guns are relatively free. it's the ammo and training that cost real money. 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. Do you have an AR barrel or feed ramp tip? And it appears that the bolt is slamming into the top of the bullet. Interesting reading. It gives a longer ramp that is less steep into the chamber. You will be able to leave a comment after signing in, AR15Armory.com You have the option of barrel type, thread, fluting, finish type and to add a match bolt. Anything else you want to share about M4 clones would be appreciated, especially when it comes to a reliable rifle. I just need a little guidance on this and I'm having trouble getting good results from Google. M4 Feed ramps on barrel extensions are a solid example. Seems like it should work to me, but be a real challenge to keep clean and be damned ugly to boot. 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. While I've got everything apart, I'm thinking I just want to put an M4 barrel extension on. 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. In general, all you need to understand is that the M4 feed ramps include the barrel extension and upper receiver. Feed ramps being m4 or. I replaced the M4 feed ramp barrel with a monolithic feed ramp barrel and no more problems. 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. 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. I wouldn't be concerned at all with any wear after modifying an upper receiver. Thats receivers, bolts, and on down the list of the 100 or so parts that can make up an AR-15. My experience with ARs is all A-1s. One new winner* is announced every week! Avoid Polishing Too Lightly Or Too Roughly Seems counter intuitive to recommend an M4 cut upper, especially if the barrel Im looking at has the rifle feed ramp (not M4 cut). The tip of the cartridge rarely comes into contact with the upper receiver. M4 feed ramps will extend the barrel extension and the upper receiver. Feed ramps on barrel extensions are a good example. I'm planning on replacing my forearm with a Larue 13.5. Questions on how to install your new BA barrel? M16s and M16-A1s run at 750 rounds per minute in full auto. Some gun owners believe that the M4 ramps can help for some of the larger-diameter cartridges in use. 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. Married pretty well with my Seekins machined lower. 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. If you have a bolt that you would like to use you are welcome to ship it to us for accurate headspace. The barrel blanks available are made from 416 Stainless Steel. 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. Paste as plain text instead, AAC and anybody else that has any reasonable expectation of quality and reliability use an M4 feed ramp. 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. Get The Best Trigger Pull Gauges To Make Every Shot Count. 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. You want them to match. I built the upper using a Mega upper with a Compass Lake 18" barrel. However, its rare now to find an upper receiver or a ready-to-go barrel that doesnt have the M4 cuts. 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. Add M4 cuts to Barrel Ext $15.00 We can modify your rifle extension to match the M4 cuts in an upper receiver. if you are OK with 3MOA, you might go 20,000 rounds! If I can correct an issue before it's an issue that is preferred. I think your mistaking that with adding ramps to the receiver. Guess what? There's a 7 degree difference between standard and M4 ramps. Some suggest taking a grinder to the extension area. Product Details Douglas 18" Flat Dark Earth Cerakoted 416 stainless steel barrel with 1-7 twist and M4 feed ramps. Read Now. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. Will my A3 upper reciever work with my M4 barrel extention.According to some or your posts they will.Thanks Bill. Gas block area is .750 diameter. 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. If your mag catch is at Spec height, you should not have a problem with an M4 cut barrel in a rifle receiver. I had seen these pix years ago and dismissed the idea of mix and match. Description Genuine 14.5" SOCOM, carbine length gas system barrel from Colt. Experts advise on 31 degrees+30 minus-zip. 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. It is milled out of 6061 T6. from my service in the 70s to my personal weapons, all of my ARs are early 1970 slab sided Colt SP1s. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. But, as with anything else, this work can go too far. 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. Either way is good and both types work great with semi auto only guns. Costs about $40-50 to have the feed ramps reprofiled from what I can gather. All things being equal and having used both weapons extensively, Id rather have the feed Ramps. This Kit is made to cut or polish the STEEL Feed Ramps on your Barrel Extension ONLY. Both. 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