adding m4 feed ramps to barrel
Your previous content has been restored. ago KrinkyDink2 9 hr. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. They offer a lower, more extensive, and smoother entry for any round of ammo, whether its necessary or not. Clear editor. I would only add the feed ramps to the receiver if I had feeding issues, which you should not have. which is bad combo. $101.95. We're a little past that point as I already own both the barrel and receiver, both of which cant easily be replaced or swapped for a decent price. M4 Feed ramps on barrel extensions are a solid example. I bought a .458 upper to go with it, with the extra internal clearance cut before anodizing. We have four combinations here: Upload or insert images from URL. This gave it a longer point for the magazine to allow the rounds to come out of the magazine and feed into the chamber. BUT, I DO NOT TRUST MY LIFE TO THAT WEAPON. 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. The M4 receiver feed ramps are cut at a steeper angle and, as a result, extend down into the receiver wall. 338 and others not the .308 76251 or 6.5 creedmore which o think should have a.30cal feed ramp.? Read Now. Some suggest taking a grinder to the extension area. Go slow and you'll be done in no time. Just because you can, doesn't mean you should. They . 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. Ideally both. FFL Fax: 866-721-8691. Looking for a black stripped A1 upper with non m4 feed ramps (just realized the upper I have wont work with my barrel). Only took a few minutes. 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. As they are becoming more and more a standard, and certainly do not do any harm to us. I just need a little guidance on this and I'm having trouble getting good results from Google. The M-16/M4 are great weapons. Is getting it as part of the upper better? Good call. 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. It has ran flawlessly (barring tuning of the gasblock when new) with several different brands of magazines and ammo. The last is using the best and right ammo for the job. 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. We reserve the right to edit as appropriate, delete profane, harassing, abusive and spam comments or posts, and block repeat offenders. Your email address will not be published. if you are OK with 3MOA, you might go 20,000 rounds! If your upper isn't showing signs of bullets rubbing on the aluminum under the barrel extension, you should be good with M4 ramps. Notice how the ramp starts on the barrel extension and not in the receiver. The barrel blanks available are made from 416 Stainless Steel. While I've got everything apart, I'm thinking I just want to put an M4 barrel extension on. 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. are all barrels w/ m4 feed ramps?? well.. it's kinda hard to get stuff in this part of the world. The barrel extension and the receiver both have to have the cuts. Can I use a barrel with M4 feed ramps with an upper that isnt M4 matched? I read in Bravo company that there are 2 kinds of flat top upper. Press J to jump to the feed. Backing up a ton: Any and all AR-15 barrel extensions have feed ramps. M4 can better explain their benefit, although they help with more reliable feeding. Married pretty well with my Seekins machined lower. can you buy feed ramps individually? A4 Complete Upper Receiver. The photo shows the dents and the bolt lugs line up perfectly. 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. It's best to use rifle/rifle combo or M4/M4. I didnt think anything about it having M4 feed ramps. 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 My experience with ARs is all A-1s. It was in the last few issues of SAR. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. 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. 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 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. You need to match up barrels to receivers for optimum performance. Most work performed while-you-wait, evening and saturday appointments available. In short, if you have a Dremmel you can do it yourself. 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. Only took a few minutes. The difference between standard feed ramps and M4 ramps is easy to see. Get The Best Trigger Pull Gauges To Make Every Shot Count. 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 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? True, which is why they're not even needed in semi autos. i have the rifle barrel. Press question mark to learn the rest of the keyboard shortcuts. I have looked and looked and looked. Add 3% to the total cost for credit card purchases. Our 6mm ARC barrel come standard with 1-7.5 Twist, M4 Feed Ramps and gas tube. 's blog. http://www.ar15fornoobs.com/wp-content/uploads/feedramps.jpg. 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. Thread: Adding M4 feedramps to A1/C7 upper. The manufacturer said they had sold hundreds of barrels with out problems reported. No feed ramps. Little polish. The upper is designed to have two levels of top rails for mounting of night vision in front of scopes. Experts advise on 31 degrees+30 minus-zip. I built the upper using a Mega upper with a Compass Lake 18" barrel. 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. To conclude, the M4 feed ramps bring a lot of improvements to the AR-platform firearms. Would not feed to save its life! Reddit and its partners use cookies and similar technologies to provide you with a better experience. These units actually feature the NON-F-Marked (correct) front sight base. What's the difference? 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. 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. Not saying a really good gunsmith cant do it, just that theres a bit of an involved process. #2. When I function tested it the first time with live half-jacketed rounds I had the worst FTF jam I have ever experienced. Is it kosher to add M4 feed ramps to a standard upper to match an m4 ramped barrel? Im an old vet, now retired and looking to build some ARs as a hobby to keep me doing something that I will enjoy. 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? 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. Does NOT include pin Remember less is more, little by little. However Ive built numerous ar15 and lr308 rifles and pistols. I guess it depends on what your relationship to the necessary shop activities is. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. so im thinking I might as well just get the unramp upper. is the m4 feedramp common in barrel extensions? Not all mil-spec features advertised on the product information are the real mil-specs. Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. 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. 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. I will attest that a rifle upper and a barrel with the M4 feedramps works just fine. The Fora platform includes forum software by XenForo. 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 Id just get one for that barrel and find a barrel with m4 extension for the upper you already have. Is one better than the other? Product Details Douglas 18" Flat Dark Earth Cerakoted 416 stainless steel barrel with 1-7 twist and M4 feed ramps. By Single Action and Double Action Which One Is Better For You? I have a 723 build (w/ C7 upper) and a 727 build (A2 upper) that use 14.5" Colt M4 barrels. 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. 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Some gun owners believe that the M4 ramps can help for some of the larger-diameter cartridges in use. "It will last 5k rounds instead of 4k. The barrel is supposed to have the M4 feed ramps. I'd rather just pay the gunsmith to make it work than hunt down another barrel/upper if possible. 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. In this episode of Gun Stock Reviews, we look at the difference between M4 Ramps and the old standard ramps of the past. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Owning Best Ruger SR9c Accessories Can Change Your Life. EDIT: Okay, I understand now! By the time you made it work you spent more time, money, and effort than if you just bought a new barrel or upper. The ramps on the regular rifle-type extension are cut just to the edge of the extension. If this is your first visit, be sure to 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. 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. 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). How long your barrel "lasts" depends on what your accuracy threshold is before you decide it is too bad to keep using. Moreover, telling someone that an extension can be modified, while not a lie, is nothing more than mental masturbation when your post contains a caveat for having the knowledge and proper tools. Seems counter intuitive to recommend an M4 cut upper, especially if the barrel Im looking at has the rifle feed ramp (not M4 cut). 5. I checked what I have now. The good idea is that the round, presented at a lower plane, will contact other lower feed ramps and go right on in. Semi autos run slower than full autos. The dimensions are different between the two, so theyd have to change some things to the feed ramps dimensions. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. M16s and M16-A1s run at 750 rounds per minute in full auto. Factory said its fine . I think your mistaking that with adding ramps to the receiver. 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. 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. 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. To measure just where the round makes impact on the feed ramps, I did not use any sort of micrometer to measure. Avoid Polishing Too Lightly Or Too Roughly 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. 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. This is one time it's better to go a little too far than to leave an edge for the . Its not a big deal but still an important thing to remember and understand.