Recommend using a gunsmith this route too if you are not comfortable. 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. Some argue that, factually, its a step to enable a smoother feeding. Some suggest taking a grinder to the extension area. 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. I will check with compass lake. The barrel extension and the receiver both have to have the cuts. April 23, 2014 in Rifle - Technical. so im thinking I might as well just get the unramp upper. After two months of back and forth, cleaned up the feed ramps. 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. The best case is to have both an upper and barrel that have the feed ramps. instead of mil-spec. 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. I'm planning on replacing my forearm with a Larue 13.5. You need to match up barrels to receivers for optimum performance. Barrel, sight and trigger work on most pistols and shotguns. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. It's best to have M4 ramps on both the upper and barrel. Full M4 feed ramps are on both the upper and barrel extension. Create an account to follow your favorite communities and start taking part in conversations. If this is your first visit, be sure to
I've modified barrel/receivers even before M4 cuts came out and done some receivers when the barrels had cuts. can the barrel extension be bought individualy? What's the difference? For someone who is new at trying to understand feed ramps it helps to read a couple different explanations. So there's a lot more going on with rounds bouncing up and down in the mags etc. Experts advise on 31 degrees+30 minus-zip. By Yamil Sued August 6, 2021. Higher pressure equte to parts (bcg, buffer, buffer spring, ROUNDS, etc) experiencing much higher wear/tear. Metal cases ammunition such as Wolf through an M4 clone? Thanks. LanceRiley, 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. Feedramps, proper staking of castle nuts, forward assist (yep went there)S-happens seen it. This gave it a longer point for the magazine to allow the rounds to come out of the magazine and feed into the chamber. 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. You will be able to leave a comment after signing in, AR15Armory.com You cannot paste images directly. Mil-spec is good for the masses, and if you want the job done it is a great start. However, they do have M4 feed-ramps which is not clone correct. The dimensions are different between the two, so theyd have to change some things to the feed ramps dimensions. You wrote that much to make a point that should have taken about 100 words? Display as a link instead, Thread: Adding M4 feedramps to A1/C7 upper. well.. it's kinda hard to get stuff in this part of the world. Reliability is the main concern for me when I re-barrel this rifle. 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. Bullets tend to bump, snag, and stub on these guns. That's an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. He had more to say and added some more engineer and gun designer speak too. The M-16/M4 are great weapons. is the m4 feedramp common in barrel extensions? America's Ultimate Shooting Sports Discounter, Click to share on Facebook (Opens in new window), Click to share on Twitter (Opens in new window), Click to share on Pinterest (Opens in new window). 2. M4 can better explain their benefit, although they help with more reliable feeding. again, Thanks. BUT if you find someone to grind your feed ramps and they do a good job, post it up and let us know. Only took a few minutes. Will my A3 upper reciever work with my M4 barrel extention.According to some or your posts they will.Thanks Bill. Edited April 27, 2014 by Mark Gale pictures would help. Contents: 1 Diamond Burr (For Colt 2 Stage Ramps) 1 Cut Lube (For Diamond Burr) 1 Bullet Stone (For Reshaping . All Rights Reserved. FN AR15 barrels are hammer forged using the same proprietary high-grade Chrome Moly Vanadium steel used in FN's venerable machinegun barrels produced to handle the punishment of . It was in the last few issues of SAR. The angle is going to be key, alot of people attempt to mimic the angle of the barrel feed ramps, this is incorrect. 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. All things being equal and having used both weapons extensively, Id rather have the feed Ramps. 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. It has ran flawlessly (barring tuning of the gasblock when new) with several different brands of magazines and ammo. Good call. And it appears that the bolt is slamming into the top of the bullet. All Rights Reserved. Those ramps line up with the barrel, which are cut deeper than on a rifle barrel. 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. Not all mil-spec features advertised on the product information are the real mil-specs. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. 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 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. M16's fed pretty well before the M4 feed ramps were introduced. M4 barrel to non M4 receiver is fine, but not the other way around. With the increased use of larger-diameter cased cartridges, the M4 feed ramps are proving their values when using them in those cartridges. Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? 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. I'm a machinist in the aerospace industry and lucky enough to have. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. Check often for fit. So the engineers lowered the feed rampa into the receiver. 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 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. When carrying out feed ramp polishing, it is crucial to prioritize the frame's angles, which is a critical part of the feed ramp. True, which is why they're not even needed in semi autos. Copyright 2016 - 2023 by AdventureFootstep.com. Costs about $40-50 to have the feed ramps reprofiled from what I can gather. The M4 was the first (allegedy) carbine length gas system. Press J to jump to the feed. Feed ramps on barrel extensions are a good example. pm me at BOG or PG, or get in touch with my number 09177542777 if you're interested. It's best to use rifle/rifle combo or M4/M4. I didn't forsee that we'd ever see the day when replacement parts would be so hard to get. practical_man Interesting reading. DSA has fat top, Mueller, non feed ramp uppers for $40. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. Featuring hand lapped 1/8 twist rate button rifling and M4 feed ramps barrel extensions, the 410 stainless barrel gives the shooter the best balance of weight and accuracy. AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. 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. First of Im not a gunsmith or firearms professional. There's a 7 degree difference between standard and M4 ramps. Thanks! The good idea is that the round, presented at a lower plane, will contact other lower feed ramps and go right on in. Don't forget read more information about it here! M4 feed ramps. However the DD 14.5 are ideally meant to mate up with M4 style upper receiver feedramps. And that is the important thing! Installing a Luth-AR Rifle Buffer Tube and an A2 Stock #1041. Site towers are not "F" marked SPECS: Length- 14.5". Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? This has been my concern with modifying the aluminum parts. If I can correct an issue before it's an issue that is preferred. Brevity matters. Powered by Invision Community, M4-style barrel extension with Rifle-type upper. 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. "C" stamp and CAGE code available. 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 rifle-platform M16s dont use them. So, what is the difference between M4 feed ramps and regular ones? Any body need a anchor for a very small boat? Went back to the sellers website and found I was not the only one with problems. EDIT: Okay, I understand now! The M4, and the CAR-15, before it have had similar problems like the ones you mentioned. Earlfillmore 13 hr. Ready to drop onto a complete lower receiver. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Owning Best Ruger SR9c Accessories Can Change Your Life. The tip of the cartridge rarely comes into contact with the upper receiver. Backing up a ton: Any and all AR-15 barrel extensions have feed ramps. aaargh.. that's the setup I hate to see. For a better experience, please enable JavaScript in your browser before proceeding. 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. A4 Complete Upper Receiver - 7075 Forged A4 Flat Top Upper Receiver - M4 Feed Ramps Includes: - Add to Cart. The ramp angles are different and changing the profile of the extension doesn't make it something it isn't. I wont buy a barrel that isnt a wylde 223 556 but Im only now noticing. 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. Create an account to follow your favorite communities and start taking part in conversations. How long your barrel "lasts" depends on what your accuracy threshold is before you decide it is too bad to keep using. 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. M4 feed ramps will extend the barrel extension and the upper receiver. Is it worth the extra 50 bucks?" There is a picture of the various options, hopefully another poster can link them. Thats an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. Upload or insert images from URL. In this episode of Gun Stock Reviews, we look at the difference between M4 Ramps and the old standard ramps of the past. M4 Feed ramps on barrel extensions are a solid example. I got my help from this thread, and thank you again to ORD. For instance I was looking at the BCM upper receiver, and it said it had M4 feed ramps machined into the upper. 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 a 723 build (w/ C7 upper) and a 727 build (A2 upper) that use 14.5" Colt M4 barrels. 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. 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. All NFA rules apply. which is basicallly an m16a1 cut down. -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! Man, its crazy how many of yall have absolutely no idea why you do what you do. Forged 7075-T6 aluminum is harder than a bulls balls. In short, if you have a Dremmel you can do it yourself. The M4 style feed ramps and barrel extension provide consistent feeding and the matte black Manganese Phosphate finish resists external corrosion and oxidation. For use by barrel manufacturers. If you have a bolt that you would like to use you are welcome to ship it to us for accurate headspace. Thank you for answering the question do well. 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. If you don't clean it but demand 3/4MOA you might get 1,500. I suggest you get a rifle receiver. The Mission of Cheaper Than Dirt! Ar-15 Manufacturers Should Be Avoided: Which Should You Buy? Rear side of a CZ-75B pistol barrel showing the (here dirty) feed ramp. While I've got everything apart, I'm thinking I just want to put an M4 barrel extension on. *Must have a registered ARFCOM account to win. 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. Notify me of follow-up comments by email. Caught a deal on a matched barrel and bolt. . Looking For Bear Creek Arsenal Barrels Review? 5. Other selections are available for upper, bolt and carrier, charging handle, handguards, flash hiders, and gas blocks. A forum community dedicated to drag racing drivers and enthusiasts. 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. Paste as plain text instead, A feed ramp is a basic feature of many breech loading cartridge firearm designs. I recently built an AR9 (Glock Mags) that has been running flawlessly for about 3-400rds. can you buy feed ramps individually? No need to alter the upper. On AR9's, I understand the distance between the Mag Follower and the Feed Ramp is a known complication in the design. We have four combinations here: Either way is good and both types work great with semi auto only guns. FFL Fax: 866-721-8691. You have the option of barrel type, thread, fluting, finish type and to add a match bolt. Read Now. I have a non ramped barrel in a ramped upper, feeds fine. colt A1E1 733 uppers didn't have extended carbine feedramps ? Whether they materialize or not depends on the direction of the mismatch. 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. 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. 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! I replaced the M4 feed ramp barrel with a monolithic feed ramp barrel and no more problems. what I fear the most is having an m4 ramp upper and then getting a barrel with a rifle ramp. Does it make a big difference? We want you, our readers, to be able to make informed decisions. The best case is to have both an upper and barrel that have the feed ramps. All comments are held for moderation and will appear after approval. 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. [ARCHIVED THREAD] - M4 feed ramp barrel in a non M4 ramp upper. This 20" BCM barrel is machined from SS410 stainless steel. I too built a .458 SOCOM carbine . By Most of barrel assemblies and upper receivers on the market now have a present of M4 feed ramps. Your email address will not be published. Gas block area is .750 diameter. 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. #2. 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. 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 M4 receiver feed ramps are cut at a steeper angle and, as a result, extend down into the receiver wall. Share it in the comments section. 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. 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). Shorter length equates to much higher pressure in the upper receiver. Only took a few minutes. are all barrels w/ m4 feed ramps?? I would just make sure to order rifle upper with rifle barrel extension or M4 upper with M4 barrel extension. 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. Our 6mm ARC barrel come standard with 1-7.5 Twist, M4 Feed Ramps and gas tube. You can put a M4 barrel and non-M4 receiver together, but you can't mismatch them the other way. Go slow and you'll be done in no time. Clear editor. Full M4 feed ramps start on the upper and continue onto the barrel extension. if you are OK with 3MOA, you might go 20,000 rounds! Do you have an AR barrel or feed ramp tip? Insert the barrel and sharpie the cut area, then use the right bit on a dremel. It has 2 ramps cut into the receiver to help the rounds feed into the chamber. You can modify the upper, but bear in mind that the un-anodized aluminum surface will be very soft and prone to wear if your particular bullet hits it frequently.