Metal cases ammunition such as Wolf through an M4 clone? 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. Oh well, as I tell my lovely and understanding bride, guns are relatively free. it's the ammo and training that cost real money. I'm a machinist in the aerospace industry and lucky enough to have. In case My barrel is rifle ramp it won't be so bad after all. I prefer them. So, I had purchased a 458 upper. 16" Pre-Ban M4 Profile Barrel Assembly CARBINE Gas System About Upper assembly comes completely head spaced and test fired. I'm planning on replacing my forearm with a Larue 13.5. Most work performed while-you-wait, evening and saturday appointments available. 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. 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. They offer a lower, more extensive, and smoother entry for any round of ammo, whether its necessary or not. If you have an account, sign in now to post with your account. so im thinking I might as well just get the unramp upper. Full M4 feed ramps start on the upper and continue onto the barrel extension. what I fear the most is having an m4 ramp upper and then getting a barrel with a rifle ramp. Man, its crazy how many of yall have absolutely no idea why you do what you do. Looking For Bear Creek Arsenal Barrels Review? For the purposes of this chapter, we'll call the new one the M4, and the old one the AR. 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. 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. Notify me of follow-up comments by email. If I can correct an issue before it's an issue that is preferred. Colt LE6920SOCOM M4 Carbine 5.56 16.1 Barrel SOCOM Sight 30-rd Does it make a big difference? aaargh.. that's the setup I hate to see. 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. Higher pressure equte to parts (bcg, buffer, buffer spring, ROUNDS, etc) experiencing much higher wear/tear. Notice how the ramp starts on the barrel extension and not in the receiver. These Mil-Spec M4 feed ramps are part of the original CNC manufacturing process. I got my help from this thread, and thank you again to ORD. Please be respectful of others. Thanks! Modify AR15 A2 barrel extension for M4 feed ramp? Get The Best Trigger Pull Gauges To Make Every Shot Count. Surplus Colt 14.5 M4 SOCOM Carbine Barrel 1/7 Twist So I'm working on my first build, and I'm a little confused. They . The barrel Throat is the second most critical component after angles and should be polished with utmost care. By They aid in feeding the round into the chamber from the magazine more easily, which make uppers and barrel extension matched. To measure just where the round makes impact on the feed ramps, I did not use any sort of micrometer to measure. Press J to jump to the feed. The barrel extension and the receiver both have to have the cuts. So, an M4 feed ramp includes the barrel extension and the upper. LanceRiley, Create Account; Log Out ; Log In ; Wishlist 0; Shopping Cart 0; Home; About i have an extra brand new M4 barrel extension ramp to replace a rifle ramp. Gas block area is .750 diameter. On AR9's, I understand the distance between the Mag Follower and the Feed Ramp is a known complication in the design. 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. Load a magazine with two or three rounds, lock the bolt group back on your rifle or carbine and insert the magazine. The M4, and the CAR-15, before it have had similar problems like the ones you mentioned. The best case is to have both an upper and barrel that have the feed ramps. 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.) . Sorta. Thread: Adding M4 feedramps to A1/C7 upper. Everything that you have on your side to make any weapons more reliable and work when it absolutely needs to is a plus. 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 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'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. Remember less is more, little by little. 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. Then the manufacturer discontinued the barrel. Does NOT include pin FN AR-15 5.56 NATO 20" Hammer Forged Barrel - Black The photo shows the dents and the bolt lugs line up perfectly. M16s and M16-A1s run at 750 rounds per minute in full auto. 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. M855A1 5.56mm NATO Penetrator Ammo Feed Ramp Issues: Real, Hype or just 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. M4 Feedramps - AR-15 Pro A couple of times I ended up with the OK set up from the picture above. Don't ever put non M4 ramped barrel on a M4 ramped upper receiver. I recently built an AR9 (Glock Mags) that has been running flawlessly for about 3-400rds. I am having a tough time finding an in-stock barrel (18 or 20 incher) with a rifle extension on it. You cannot paste images directly. For new construction barrels only. 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. Mil-spec is good for the masses, and if you want the job done it is a great start. Rear side of a CZ-75B pistol barrel showing the (here dirty) feed ramp. If you have a bolt that you would like to use you are welcome to ship it to us for accurate headspace. 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. Ideally both. 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. Thats an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. Not saying a really good gunsmith cant do it, just that theres a bit of an involved process. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. The magazine lips cannot move, so with these larger diameter cartridges, the bullet tips down lower about the centerline of the bore (half of the diameter increase to be exact). The barrel blanks available are made from 416 Stainless Steel. I like all my guns to be reliable. Any use of this content without express written consent is prohibited. AR-15 Feed Ramp Problems - School of the American Rifle Copyright 1996-2023 AR15.COM LLC. One new winner* is announced every week! All uppers are assembled cleaned and tested before shipping. 30 cal. Guess what? Create an account to follow your favorite communities and start taking part in conversations. Im an old vet, now retired and looking to build some ARs as a hobby to keep me doing something that I will enjoy. M4 ramps help in feeding in for carbine in full auto. Home Firearms Figuring Out Feed Ramps. 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. instead of mil-spec. Clear editor. Barrels are Douglas 416 stainless steel with 1-7 twist with M4 feed ramps Supposedly you'll only notice issues with rapid/auto fire with a configuration like this. The difference between standard feed ramps and M4 ramps is easy to see. Looking for a black stripped A1 upper with non m4 feed ramps (just realized the upper I have wont work with my barrel). 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. The Bullet ~ Handguns, Rifles and Shotguns, http://thearguys.com/ar-facts/m4-feed-ramps/. I will attest that a rifle upper and a barrel with the M4 feedramps works just fine. Will my A3 upper reciever work with my M4 barrel extention.According to some or your posts they will.Thanks Bill. I read in Bravo company that there are 2 kinds of flat top upper. Do you have an AR barrel or feed ramp tip? 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. 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. Should M4 feed ramps come with the barrel or upper? : r/ar15 - reddit He had more to say and added some more engineer and gun designer speak too. By the time you made it work you spent more time, money, and effort than if you just bought a new barrel or upper. 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. A forum community dedicated to drag racing drivers and enthusiasts. Thank you for answering the question do well. Its easier to add feed ramps to the receiver not so easy to add them to the barrel extension. Add 3% to the total cost for credit card purchases. *Must have a registered ARFCOM account to win. We want you, our readers, to be able to make informed decisions. In short, if you have a Dremmel you can do it yourself. Recommend using a gunsmith this route too if you are not comfortable. The ramps on the regular rifle-type extension are cut just to the edge of the extension. Thats why AR10s- And Scar heavies exist for. Paste as plain text instead, well.. it's kinda hard to get stuff in this part of the world. Thanks. FN AR-15 5.56X45mm Nato 14.70" M4 Profile Barrel Carbine Length Gas You wrote that much to make a point that should have taken about 100 words? AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. It has 2 ramps cut into the receiver to help the rounds feed into the chamber. With a larger diameter case body sitting down in the magazine, the tip of the bullet sits lower in relation to the chamber/bore centerline than with a .223-size round. if you are OK with 3MOA, you might go 20,000 rounds! Questions on how to install your new BA barrel? If you ever have an issue, then look at getting a correct barrel for the upper. 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! AR9 - Help diagnosing feeding issue. I've seen uppers with and without anodizing on M4 ramps . it seems to me to be about 50/50 with and without. The first reason is that they are, indeed, better. what does it do?? Hasn't misfed yet, through initial break in up through 1k rounds, and that's mag length ammo. "A Bad Day At The Range Is Better Than A Great Day Working". I think your mistaking that with adding ramps to the receiver. I've seen that pic, it is a good reference. i have the rifle barrel. If this is your first visit, be sure to By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. The ramp angles are different and changing the profile of the extension doesn't make it something it isn't. And that the M4s and M4A1s are issued M855 which has a slight difference in bullet shape vs. the older 55gr M193 BALL. However, its rare now to find an upper receiver or a ready-to-go barrel that doesnt have the M4 cuts. M4 feed ramps are not an original design, they were designed for the M4 In fact, the . Pasted as rich text. This USGI modification was done to both the barrel extension and the upper receiver, creating a longer and steeper feed ramp. can you buy feed ramps individually? 410 stainless is also harder and more corrosion resistant than conventional 416 stainless found in other commercially available precision barrels. M4 feed ramp barrel in a non M4 ramp upper - AR15.COM So, lets glide down these lines below to erase your misconceptions about them. which is bad combo. 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. Also, barrel life is relative. The Fora platform includes forum software by XenForo. pm me at BOG or PG, or get in touch with my number 09177542777 if you're interested. 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.