If I can correct an issue before it's an issue that is preferred. A forum community dedicated to drag racing drivers and enthusiasts. The last is using the best and right ammo for the job. 5. The dimensions are different between the two, so theyd have to change some things to the feed ramps dimensions. pictures would help. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. Hasn't misfed yet, through initial break in up through 1k rounds, and that's mag length ammo. No need to alter the upper. I found the article very informative. For a better experience, please enable JavaScript in your browser before proceeding. Looking For Bear Creek Arsenal Barrels Review? They guide the bullet up and into the chamber. Just put it in and shoot it. Backing up a ton: Any and all AR-15 barrel extensions have feed ramps. 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. The mil actually only specs M4 feed ramps for use in its M4s. 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. I would only add the feed ramps to the receiver if I had feeding issues, which you should not have. I have a non ramped barrel in a ramped upper, feeds fine. Not all mil-spec features advertised on the product information are the real mil-specs. Add M4 cuts to Barrel Ext $15.00 We can modify your rifle extension to match the M4 cuts in an upper receiver. "It will last 5k rounds instead of 4k. ago KrinkyDink2 9 hr. 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). Experts advise on 31 degrees+30 minus-zip. I've modified barrel/receivers even before M4 cuts came out and done some receivers when the barrels had cuts. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. JavaScript is disabled. Brevity matters. Lol. You have the option of barrel type, thread, fluting, finish type and to add a match bolt. Check often for fit. As suggested, its best to match the upper and barrel extension no worries that way. upper recievers and barrels are hard to comeby. 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! I put together a second AR9 that is having a feeding issue, even if using similar parts as the first one. Anodized red parts. Forged 7075-T6 aluminum is harder than a bulls balls. $101.95. M4 Feed ramps on barrel extensions are a solid example. Is one better than the other? Finding the proper upper receiver is your best option. The closest brand new barrel you are likely to find is the Windham Weaponry 20 inch 1/7 twist chrome lined barrel. You need to match up barrels to receivers for optimum performance. The best case is to have both an upper and barrel that have the feed ramps. Buy AR 15 16" .350 Legend Nitride M4 Profile Barrel 1:16: GunBroker is the largest seller of AR15 Parts Gun Parts All: 974000728 . I built the upper using a Mega upper with a Compass Lake 18" barrel. Site towers are not "F" marked SPECS: Length- 14.5". this is the barrel designed and profiled for the Mark 12 Mod 0 uppers and rifles. It may not display this or other websites correctly. 's blog. Only took a few minutes. I'll probably build a pistol out of this one. Create Account; Log Out ; Log In ; Wishlist 0; Shopping Cart 0; Home; About Copyright 1996-2023 AR15.COM LLC. Please allow 5~10 days for assembly and testing before ship date. Instead, I just loaded up each mag with two rounds, and pushed the rounds forward by hand until the tip of . ago Costs about $40-50 to have the feed ramps reprofiled from what I can gather. This is a big tip, by the way, for pistol-caliber ARs. Semi autos run slower than full autos. 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. Press J to jump to the feed. M16's fed pretty well before the M4 feed ramps were introduced. Supposedly you'll only notice issues with rapid/auto fire with a configuration like this. I didnt think anything about it having M4 feed ramps. Questions on how to install your new BA barrel? M4 barrel to non M4 receiver is fine, but not the other way around. There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. By Feedramps, proper staking of castle nuts, forward assist (yep went there)S-happens seen it. I didn't forsee that we'd ever see the day when replacement parts would be so hard to get. 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 . From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. If this is your first visit, be sure to Single Action and Double Action Which One Is Better For You? I wont buy a barrel that isnt a wylde 223 556 but Im only now noticing. 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. 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. Earlfillmore 13 hr. The Shooter's Log, is to provide informationnot opinionsto our customers and the shooting community. 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. Higher pressure equte to parts (bcg, buffer, buffer spring, ROUNDS, etc) experiencing much higher wear/tear. In short, if you have a Dremmel you can do it yourself. If you have an account, sign in now to post with your account. The barrels also had to be modified. 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. For a better experience, please enable JavaScript in your browser before proceeding. Its not a big deal but still an important thing to remember and understand. I was planning on using a Daniel Defense 14.5 pencil barrel, because like the C8 they are CHF, lightweight profile, and .750 at the FSB (And also because quality carbine pencil barrels with .625 gas blocks seem to be in short supplyor else I'd just build a 723 clone.) . Its highly recommended to put any AR-platform firearm together with a matching M4 barrel extension and upper receiver set. Barrel is medium SPR profiled barrel, threaded with a 1/2-28 thread for the AE brakes and collar. 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. Polishing the edges of the chamber mouth to remove the edges of that chamfer will. /r/ar15 is here for your favorite black gun links, build pics, questions and other tactical or practical information. The upper is designed to have two levels of top rails for mounting of night vision in front of scopes. BUT if you find someone to grind your feed ramps and they do a good job, post it up and let us know. I'd rather just pay the gunsmith to make it work than hunt down another barrel/upper if possible. Notify me of follow-up comments by email. Im an old vet, now retired and looking to build some ARs as a hobby to keep me doing something that I will enjoy. 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 have looked and looked and looked. The M4 style feed ramps and barrel extension provide consistent feeding and the matte black Manganese Phosphate finish resists external corrosion and oxidation. You need to match up barrels to receivers for optimum performance. 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. If I have a rifle ramp upper and get the barrel later and coincidentally will have an m4 ramp. Notice how the ramp starts on the barrel extension and not in the receiver. Feels like a silly question now that it makes sense. M4 feed ramps will extend the barrel extension and the upper receiver. Thank you for answering the question do well. Clear editor. So, I had purchased a 458 upper. what I fear the most is having an m4 ramp upper and then getting a barrel with a rifle ramp. Married pretty well with my Seekins machined lower. For someone who is new at trying to understand feed ramps it helps to read a couple different explanations. The good idea is that the round, presented at a lower plane, will contact other lower feed ramps and go right on in. This can lead to a rare but odd situation; barrel and receiver mismatch. I can still use the combination. For those who have actually done it will a new barrel with the M4 feed ramp extension function properly with an old school rifle-type upper receiver? I replaced the M4 feed ramp barrel with a monolithic feed ramp barrel and no more problems. Both. For use by barrel manufacturers. Feeds flawlessly. A4 Complete Upper Receiver - 7075 Forged A4 Flat Top Upper Receiver - M4 Feed Ramps Includes: - Add to Cart. Machined from 4150 Chrome Moly Vanadium Steel and feature a QPQ corrosion resistant finish and QPQ coated M4 feed ramp extension. While this gun is a more of novelty build than a "serious use" AR, I intend to use good parts and want it to run as well as my other ARs. Insert the barrel and sharpie the cut area, then use the right bit on a dremel. It has ran flawlessly (barring tuning of the gasblock when new) with several different brands of magazines and ammo. However, its rare now to find an upper receiver or a ready-to-go barrel that doesnt have the M4 cuts. There's a 7 degree difference between standard and M4 ramps. How long your barrel "lasts" depends on what your accuracy threshold is before you decide it is too bad to keep using. You also repeated yourself. Either way is good and both types work great with semi auto only guns. M4 feed ramps. Looking to spend $180-250 (depending on condition, forge mark and if a rear sight is included or not.) Man, its crazy how many of yall have absolutely no idea why you do what you do. Ballistic Performance of Federal Punch .22 LR Ammunition with the Heritage Barkeep #1063. This has been my concern with modifying the aluminum parts. I had seen these pix years ago and dismissed the idea of mix and match. 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. can the barrel extension be bought individualy? The only one I found is LaRue's upper, but it won't work with the hand guard I'm using (Geissele MKIII). I can probably get the upper reciever first. Powered by Invision Community, M4-style barrel extension with Rifle-type upper. Gun smith said , not head spaced properly. A feed ramp is a basic feature of many breech loading cartridge firearm designs. All this basically means is that the ramps continue from the barrel extension down through the upper receiver tonthe magazine. However, an M4 barrel extension is dished more so the feed ramps could extend downward, and then an area within the upper is shaped to match. With the increased use of larger-diameter cased cartridges, the M4 feed ramps are proving their values when using them in those cartridges. 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. FN AR-15 5.56X45mm Nato . FFL Fax: 866-721-8691. I read in Bravo company that there are 2 kinds of flat top upper. 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). Thats why AR10s- And Scar heavies exist for. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. FWIW one of my rifles has M4 feed ramps on the barrel and no M4 feed ramps on the upper and it has functioned just fine. Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? 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. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. By the time you made it work you spent more time, money, and effort than if you just bought a new barrel or upper. 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. As a result, the factory machined M4 feed ramps on the receiver are hard coat anodized which adds significant strength to the aluminum. The A2's are pretty reliable guns, but trashed mags can cause them to have malfunctions also. Go slow and you'll be done in no time. These units actually feature the NON-F-Marked (correct) front sight base. 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. What's the difference? AR9 - Help diagnosing feeding issue.