Barrel is medium SPR profiled barrel, threaded with a 1/2-28 thread for the AE brakes and collar. 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! All Rights Reserved. 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 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. from my service in the 70s to my personal weapons, all of my ARs are early 1970 slab sided Colt SP1s. I don't have much to add re: feed ramps, but. My experience with ARs is all A-1s. Questions on how to install your new BA barrel? 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). He had more to say and added some more engineer and gun designer speak too. I prefer them. 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 The upper is designed to have two levels of top rails for mounting of night vision in front of scopes. Good call. 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. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. Single Action and Double Action Which One Is Better For You? Seems like it should work to me, but be a real challenge to keep clean and be damned ugly to boot. Sent back again. And it appears that the bolt is slamming into the top of the bullet. Earlfillmore 13 hr. The M-16/M4 are great weapons. I think your mistaking that with adding ramps to the receiver. I put together a second AR9 that is having a feeding issue, even if using similar parts as the first one. 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. 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. In case My barrel is rifle ramp it won't be so bad after all. On the other hand, I wouldn't consider them as a deal breaker, and they would not pass up a good deal with an upper only because it did not have them - the M4 feed ramps. It's best to have M4 ramps on both the upper and barrel. I have a non ramped barrel in a ramped upper, feeds fine. Paste as plain text instead, This can lead to a rare but odd situation; barrel and receiver mismatch. All comments are held for moderation and will appear after approval. 2. This 20" BCM barrel is machined from SS410 stainless steel. The extension is the part at the end of the barrel that fits inside the upper. Not saying a really good gunsmith cant do it, just that theres a bit of an involved process. Description. M4 feed ramps are not an original design, they were designed for the M4 In fact, the . 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. You can put a M4 barrel and non-M4 receiver together, but you can't mismatch them the other way. By Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. The M4 was the first (allegedy) carbine length gas system. It is a tightly machined and polished piece of metal which guides a cartridge from the top of the magazine into the firing chamber of the barrel. You absolutely do not want it the other way around however. The A2's are pretty reliable guns, but trashed mags can cause them to have malfunctions also. It has ran flawlessly (barring tuning of the gasblock when new) with several different brands of magazines and ammo. Oh well, as I tell my lovely and understanding bride, guns are relatively free. it's the ammo and training that cost real money. Then the manufacturer discontinued the barrel. Pasted as rich text. These units actually feature the NON-F-Marked (correct) front sight base. 2. Finding the proper upper receiver is your best option. Shorter length equates to much higher pressure in the upper receiver. Create an account to follow your favorite communities and start taking part in conversations. *Must have a registered ARFCOM account to win. can you buy feed ramps individually? Higher pressure equte to parts (bcg, buffer, buffer spring, ROUNDS, etc) experiencing much higher wear/tear. There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. instead of mil-spec. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. It's near impossible to replace the carry handle upper I have these days, and finding a colt chrome lined 20" light weight barrel isn't a walk in the park either. Press J to jump to the feed. BrianEnos.com You can post now and register later. The Bullet ~ Handguns, Rifles and Shotguns, http://thearguys.com/ar-facts/m4-feed-ramps/. . i have an extra brand new M4 barrel extension ramp to replace a rifle ramp. 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). Not all mil-spec features advertised on the product information are the real mil-specs. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. So, lets glide down these lines below to erase your misconceptions about them. Founded by Frank Galli in 2000, Snipers Hide has been offering informational videos, podcasts, and other support to its users in one location. My alternative plan is to do exactly as you describe. I read in Bravo company that there are 2 kinds of flat top upper. However, they do have M4 feed-ramps which is not clone correct. 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. I'm a machinist in the aerospace industry and lucky enough to have. JavaScript is disabled. Sorta. Press question mark to learn the rest of the keyboard shortcuts. The parts are interchangeable. I wouldn't be concerned at all with any wear after modifying an upper receiver. what I fear the most is having an m4 ramp upper and then getting a barrel with a rifle ramp. A4 Complete Upper Receiver. Your discussions, feedback and comments are welcome here as long as they are relevant and insightful. I have looked and looked and looked. Seems M4 is all the rage these days. - The Shooter's Log, 2012 SHOT Show Special Report: Daniel Defense DDM4 V5 in .300 Blackout and a Factory SBR - The Shooter's Log, 2012 SHOT Show Special Report: SOG Armory Predator Rifle - The Shooter's Log, Surefire's 100-Round MAG5-100: The Highest Capacity AR-15 Magazine - The Shooter's Log, Throwback Thursday: Taurus Judge Range Report, ATI Milsport SGA 410 All the Advantages of an AR in .410, Ruger SR1911 LW Commander The Lightweight .45 ACP, Rifle Hack: Sighting for 100 Yards at a Distance of 25 Yards, Throwback Thursday: All About Bullet Grain. I built the upper using a Mega upper with a Compass Lake 18" barrel. Press J to jump to the feed. Try this little exercise: 1. Your link has been automatically embedded. 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. 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. 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. Home Firearms Figuring Out Feed Ramps. It has 2 ramps cut into the receiver to help the rounds feed into the chamber. All things being equal and having used both weapons extensively, Id rather have the feed Ramps. . Thread: Adding M4 feedramps to A1/C7 upper. You cannot paste images directly. If your upper isn't showing signs of bullets rubbing on the aluminum under the barrel extension, you should be good with M4 ramps. I recently picked up a barrel that I thought had M4 feed ramps, but it doesn't line up with my M4 feed ramp upper. Some gun owners believe that the M4 ramps can help for some of the larger-diameter cartridges in use. The barrel is supposed to have the M4 feed ramps. If it's happening regularly, check the magazines you are using for serviceability. I'd rather just pay the gunsmith to make it work than hunt down another barrel/upper if possible. So the engineers lowered the feed rampa into the receiver. Thanks. I have a 723 build (w/ C7 upper) and a 727 build (A2 upper) that use 14.5" Colt M4 barrels. colt A1E1 733 uppers didn't have extended carbine feedramps ? 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. 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. Does it make a big difference? Snipers Hide is a community of Snipers of all kinds, focusing on long range shooting, accuracy, and ballistics. You need to match up barrels to receivers for optimum performance. 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? The ramps on the regular rifle-type extension are cut just to the edge of the extension. One of the AR15 engineers under Gene Stoner pretty much said that the M4 isn't a good platform, especially once the gas port erodes a bit. 338 and others not the .308 76251 or 6.5 creedmore which o think should have a.30cal feed ramp.? Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? So I'm working on my first build, and I'm a little confused. Gun smith said , not head spaced properly.
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adding m4 feed ramps to barrel