Higher pressure equte to parts (bcg, buffer, buffer spring, ROUNDS, etc) experiencing much higher wear/tear. The difference between standard feed ramps and M4 ramps is easy to see. If you have a bolt that you would like to use you are welcome to ship it to us for accurate headspace. Would not feed to save its life! They provide a lower, wider, and smoother entry for any round of ammo, whether its necessary or not. I have a 723 build (w/ C7 upper) and a 727 build (A2 upper) that use 14.5" Colt M4 barrels. It's best to use rifle/rifle combo or M4/M4. Theres a bit more to it than just polishing. They offer a lower, more extensive, and smoother entry for any round of ammo, whether its necessary or not. Should not be too hard. 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. I prefer them. The Differences Between an M4 and an AR15 - Music Raiser 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! Bullets tend to bump, snag, and stub on these guns. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. Having been in military supply, I know that what the mil-spec means: it gets the minimum job done for thousands (millions) of parts/systems. PSA PA-15 16"M4 Phosphate 5.56 NATO 1/7 Classic AR-15 Rifle with 13.5"M And that is the important thing! One new winner* is announced every week! I like getting another Upper idea then you could end up with two rifles! Proper maintenance and lubrication. m4 feed ramps - The Armorer - AR15Armory.com Mil-spec is good for the masses, and if you want the job done it is a great start. And it appears that the bolt is slamming into the top of the bullet. AR 15 16" .350 Legend Nitride M4 Profile Barrel 1:16 Dec 17, 2020. I'd rather just pay the gunsmith to make it work than hunt down another barrel/upper if possible. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. There's a 7 degree difference between standard and M4 ramps. 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. LanceRiley, Issues can arise when receivers and barrel extensions are mismatched. Looking For Bear Creek Arsenal Barrels Review? Feed ramps being m4 or. Costs about $40-50 to have the feed ramps reprofiled from what I can gather. Barrels are Douglas 416 stainless steel with 1-7 twist with M4 feed ramps Feeds flawlessly. Founded by Frank Galli in 2000, Snipers Hide has been offering informational videos, podcasts, and other support to its users in one location. It has 2 ramps cut into the receiver to help the rounds feed into the chamber. You also repeated yourself. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. It is removeable with a special wrench and a barrel clamp/vise. Shorter length equates to much higher pressure in the upper receiver. These Mil-Spec M4 feed ramps are part of the original CNC manufacturing process. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. Previous. You have the option of barrel type, thread, fluting, finish type and to add a match bolt. M855A1 5.56mm NATO Penetrator Ammo Feed Ramp Issues: Real, Hype or just The M4, and the CAR-15, before it have had similar problems like the ones you mentioned. 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). For someone who is new at trying to understand feed ramps it helps to read a couple different explanations. Change the angle so that the ramp ends at the exact same point. You must log in or register to reply here. Feed Ramps -300BlkTalk ago KrinkyDink2 9 hr. 2. Caught a deal on a matched barrel and bolt. Thread: Adding M4 feedramps to A1/C7 upper. They guide the bullet up and into the chamber. check out the. Questions on how to install your new BA barrel? #2. Any use of this content without express written consent is prohibited. They aid in feeding the round into the chamber from the magazine more easily, which make uppers and barrel extension matched. M4-style barrel extension with Rifle-type upper - Rifle - Technical I've seen that pic, it is a good reference. This is a big tip, by the way, for pistol-caliber ARs. We have four combinations here: I will check with compass lake. So, I had purchased a 458 upper. Adding M4 feedramps to A1/C7 upper - M4Carbine.net 1 is a standard and the other for use with m4 feed ramp barrels. The barrel Throat is the second most critical component after angles and should be polished with utmost care. I have a non ramped barrel in a ramped upper, feeds fine. To measure just where the round makes impact on the feed ramps, I did not use any sort of micrometer to measure. RTS Bartlein: 6mm ARC 26" - Compass Lake Engineering, LLC 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. They were not intended to be super long range man killers. Does NOT include pin Rifle vs m4 feed ramps - AR15.COM 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. I picked up a side charging upper from Sundevil last year. All Rights Reserved. That's an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. M4 Feedramps - AR-15 Pro Go back to writing school. True, which is why they're not even needed in semi autos. You can post now and register later. Thanks for explaining the feed ramp topic in a couple of different ways. If you ever have an issue, then look at getting a correct barrel for the upper. Display as a link instead, The only other time it seems to help is if the mag is feeding the rounds with the bullet slightly angled lower than normal. That puts the cartridge in a position where the extended feed ramp improves the breech-loading design. Can I use a barrel with M4 feed ramps with an upper that isnt M4 matched? Read Now. 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. You can always buy a non-m4 extension and have the new barrel retimed and headspaced, but it will probably cost more than a new upper receiver. The photo shows the dents and the bolt lugs line up perfectly. Ideally both. The barrel is supposed to have the M4 feed ramps. Adding feedramps - M4Carbine.net AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. Feedramps, proper staking of castle nuts, forward assist (yep went there)S-happens seen it. 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. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. No Feed Ramps on upper? - General Discussion - 308AR.com Community Load a magazine with two or three rounds, lock the bolt group back on your rifle or carbine and insert the magazine. With the increased use of larger-diameter cased cartridges, the M4 feed ramps are proving their values when using them in those cartridges. My alternative plan is to do exactly as you describe. 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. I notice that's a Gibbz (or Gibbz-type) upper. In most cases the ramps only help during full auto mode while cycling at a high rate. and add them to non-m4 barrels.? Clear editor. BrianEnos.com Machined from 4150 Chrome Moly Vanadium Steel and feature a QPQ corrosion resistant finish and QPQ coated M4 feed ramp extension. hey bro nice to see you here!!! If it's happening regularly, check the magazines you are using for serviceability. It gives a longer ramp that is less steep into the chamber. i have an extra brand new M4 barrel extension ramp to replace a rifle ramp. For use by barrel manufacturers. Man, its crazy how many of yall have absolutely no idea why you do what you do. Don't forget read more information about it here! So the engineers lowered the feed rampa into the receiver. For the purposes of this chapter, we'll call the new one the M4, and the old one the AR. Seems like it should work to me, but be a real challenge to keep clean and be damned ugly to boot. We reserve the right to edit as appropriate, delete profane, harassing, abusive and spam comments or posts, and block repeat offenders. Gun smith said , not head spaced properly. The extension is the part at the end of the barrel that fits inside the upper. All comments are held for moderation and will appear after approval. I'll probably build a pistol out of this one. Surplus Colt 14.5 M4 SOCOM Carbine Barrel 1/7 Twist 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. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. So I'm working on my first build, and I'm a little confused. 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. Avoid Polishing Too Lightly Or Too Roughly Married pretty well with my Seekins machined lower. Reddit and its partners use cookies and similar technologies to provide you with a better experience. However, they do have M4 feed-ramps which is not clone correct. If you don't clean it but demand 3/4MOA you might get 1,500. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. I just need a little guidance on this and I'm having trouble getting good results from Google. This is one time it's better to go a little too far than to leave an edge for the . Rear side of a CZ-75B pistol barrel showing the (here dirty) feed ramp. For instance I was looking at the BCM upper receiver, and it said it had M4 feed ramps machined into the upper. Supposedly you'll only notice issues with rapid/auto fire with a configuration like this. Snipers Hide is a community of Snipers of all kinds, focusing on long range shooting, accuracy, and ballistics. Paste as plain text instead, Is one better than the other? Do you have an AR barrel or feed ramp tip? The ramps are in the barrel extension. 5. Feels like a silly question now that it makes sense. 14.5" M4 SOCOM Barrel Assembly with Sight Tower - Brownells M4 Feed ramps on barrel extensions are a solid example. instead of mil-spec. When you need to nail something you use a hammer not a wrench.