By Yamil Sued August 6, 2021. This USGI modification was done to both the barrel extension and the upper receiver, creating a longer and steeper feed ramp. A couple of times I ended up with the OK set up from the picture above. There is a picture of the various options, hopefully another poster can link them. When carrying out feed ramp polishing, it is crucial to prioritize the frame's angles, which is a critical part of the feed ramp. 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 Factory said its fine . You want them to match. 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. They provide a lower, wider, and smoother entry for any round of ammo, whether its necessary or not. The last is using the best and right ammo for the job. What is an m4 feed ramp? Feed ramps on barrel extensions are a good example. Was sort of worried about how it would run with an 11.5" barrel and mismatched ramps, but it sounds like it should be good to go either way. 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. Id just get one for that barrel and find a barrel with m4 extension for the upper you already have. 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. I too built a .458 SOCOM carbine . I didn't forsee that we'd ever see the day when replacement parts would be so hard to get. 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. which is basicallly an m16a1 cut down. Full M4 feed ramps are on both the upper and barrel extension. Little polish. Barrels are Douglas 416 stainless steel with 1-7 twist with M4 feed ramps There's a 7 degree difference between standard and M4 ramps. I have a non ramped barrel in a ramped upper, feeds fine. Looking For Bear Creek Arsenal Barrels Review? It is milled out of 6061 T6. is the m4 feedramp common in barrel extensions? 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. April 23, 2014 in Rifle - Technical. The Bullet ~ Handguns, Rifles and Shotguns, http://thearguys.com/ar-facts/m4-feed-ramps/. By the time you made it work you spent more time, money, and effort than if you just bought a new barrel or upper. Press question mark to learn the rest of the keyboard shortcuts. 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). That's an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. Being a Newbie AR owner ((Ive been an avid gun owner for nearly 50 years), I appreciate the information and visual aids that Im sure will be a big help in enjoying and using this gun platform. 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. "A Bad Day At The Range Is Better Than A Great Day Working". Your link has been automatically embedded. I built the upper using a Mega upper with a Compass Lake 18" barrel. - 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. Check often for fit. 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. It is removeable with a special wrench and a barrel clamp/vise. Avoid Polishing Too Lightly Or Too Roughly 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? http://www.ar15fornoobs.com/wp-content/uploads/feedramps.jpg. Whether they materialize or not depends on the direction of the mismatch. No feed ramps. AR9 - Help diagnosing feeding issue. Thanks! Would not feed to save its life! The M4 was the first (allegedy) carbine length gas system. M4 feed ramps will extend the barrel extension and the upper receiver. It's best to have M4 ramps on both the upper and barrel. Ideally both. Paste as plain text instead, I've seen that pic, it is a good reference. Backing up a ton: Any and all AR-15 barrel extensions have feed ramps. You must log in or register to reply here. In case My barrel is rifle ramp it won't be so bad after all. In short, if you have a Dremmel you can do it yourself. How long your barrel "lasts" depends on what your accuracy threshold is before you decide it is too bad to keep using. In most cases the ramps only help during full auto mode while cycling at a high rate. With the bcg moving that much faster, the magazine springs were having a hard time supplying the rounds fast enough, AS WELL AS the tips of the rounds were digging into the feed ramps and catching. Thanks for explaining the feed ramp topic in a couple of different ways. Forged 7075-T6 aluminum is harder than a bulls balls. On AR9's, I understand the distance between the Mag Follower and the Feed Ramp is a known complication in the design. 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. Related: If you are using a Ar rifle, best green laser sight is good choice for hunting. 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. What is the difference between Modern, Performance, and Premium Series Barrels? And that is the important thing! Which Model Colt 1911 is For Me? 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. AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. so im thinking I might as well just get the unramp upper. if you are OK with 3MOA, you might go 20,000 rounds! Questions on how to install your new BA barrel? VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. The best case is to have both an upper and barrel that have the feed ramps. FN AR-15 5.56X45mm Nato . 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? CARBON-15 Stripped Lower Receiver I've seen uppers with and without anodizing on M4 ramps . it seems to me to be about 50/50 with and without. The best case is to have both an upper and barrel that have the feed ramps. BUT if you find someone to grind your feed ramps and they do a good job, post it up and let us know. For a better experience, please enable JavaScript in your browser before proceeding. Press J to jump to the feed. So, an M4 feed ramp includes the barrel extension and the upper. Feed ramps being m4 or. 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 document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Owning Best Ruger SR9c Accessories Can Change Your Life. Is it worth the extra 50 bucks?" You wrote that much to make a point that should have taken about 100 words? 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. 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. - The Shooter's Log, 2012 SHOT Show Special Report: Del-Ton TRX Rifle and More! Powered by Invision Community. For someone who is new at trying to understand feed ramps it helps to read a couple different explanations. #2. Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? Hasn't misfed yet, through initial break in up through 1k rounds, and that's mag length ammo. However Ive built numerous ar15 and lr308 rifles and pistols. 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 think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. Go back to writing school. Its not a big deal but still an important thing to remember and understand. The ramps on the regular rifle-type extension are cut just to the edge of the extension. Man, its crazy how many of yall have absolutely no idea why you do what you do. Issues can arise when receivers and barrel extensions are mismatched. Some gun owners believe that the M4 ramps can help for some of the larger-diameter cartridges in use. It may not display this or other websites correctly. 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. 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). Some argue that, factually, its a step to enable a smoother feeding. Come join the discussion about racing, builds, pro mods, hot rods, events, turbos, nitrous, superchargers, and more! 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! what does it do?? 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. I wouldn't be concerned at all with any wear after modifying an upper receiver. Anything else you want to share about M4 clones would be appreciated, especially when it comes to a reliable rifle. All things being equal and having used both weapons extensively, Id rather have the feed Ramps. Full M4 feed ramps start on the upper and continue onto the barrel extension. While I've got everything apart, I'm thinking I just want to put an M4 barrel extension on. I had seen these pix years ago and dismissed the idea of mix and match. For new construction barrels only. For this test, I used a Colt upper with M4 feed ramps and a SOCOM heavy 14.5 barrel, just like what is used in the military. 308 m5 using m4 feed ramps, which I belive are for the smaller round like. Thread: Adding M4 feedramps to A1/C7 upper. All we do is dremmel it to match - we dont remove it and grind to any specific angle. I'm assuming that you only need the ramps from one or the other. Recommend using a gunsmith this route too if you are not comfortable. M4 ramps help in feeding in for carbine in full auto. I prefer them. The Shooter's Log, is to provide informationnot opinionsto our customers and the shooting community. The photo shows the dents and the bolt lugs line up perfectly. They were not intended to be super long range man killers. I found the article very informative. Description. No need to alter the upper. You can put a M4 barrel and non-M4 receiver together, but you can't mismatch them the other way. M4 Feed ramps on barrel extensions are a solid example. However the DD 14.5 are ideally meant to mate up with M4 style upper receiver feedramps. All Rights Reserved. Costs about $40-50 to have the feed ramps reprofiled from what I can gather. pictures would help. So the engineers lowered the feed rampa into the receiver. Press J to jump to the feed. The reason I decided to write about this topic at all was because there are some mil-spec features advertised on aftermarket parts that arent even really mil-spec. Bear Creek Arsenal Barrels - 6.5 Grendel Type 2 Barrel This Gorilla Machining AR-15 16" heavy Black Nitride 6.5 Grendel barrel has a Carbine length gas system with a 1:8 twist. aaargh.. that's the setup I hate to see. I recommend putting any AR-platform firearm together with a matched M4 barrel extension and upper receiver set, just because you can. Create an account to follow your favorite communities and start taking part in conversations. An older-version (or A2-style) feed ramp is cut only on the barrel extension itself (top). The M4 ramps, if I am not mistaken, were originally made to help reduce malfunctions on the M4 carbine. 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. I think your mistaking that with adding ramps to the receiver. If I have a rifle ramp upper and get the barrel later and coincidentally will have an m4 ramp. Thats receivers, bolts, and on down the list of the 100 or so parts that can make up an AR-15. When I function tested it the first time with live half-jacketed rounds I had the worst FTF jam I have ever experienced. Editors Note: This article was originally published in January of 2019. I'm lookin for a clear definition as to what they are, and what they do to enhance a given rifle's performance? The difference between standard feed ramps and M4 ramps is easy to see. Looking to spend $180-250 (depending on condition, forge mark and if a rear sight is included or not.) If you have a bolt that you would like to use you are welcome to ship it to us for accurate headspace. Add 3% to the total cost for credit card purchases. I notice that's a Gibbz (or Gibbz-type) upper. All Rights Reserved. We reserve the right to edit as appropriate, delete profane, harassing, abusive and spam comments or posts, and block repeat offenders. Ar-15 Manufacturers Should Be Avoided: Which Should You Buy? I will attest that a rifle upper and a barrel with the M4 feedramps works just fine. ago KrinkyDink2 9 hr. M4 Feed ramps on barrel extensions are a solid example. Either way is good and both types work great with semi auto only guns. practical_man well.. it's kinda hard to get stuff in this part of the world. Seems counter intuitive to recommend an M4 cut upper, especially if the barrel Im looking at has the rifle feed ramp (not M4 cut). Please be respectful of others. I didnt think anything about it having M4 feed ramps. If this is your first visit, be sure to So, an M4 feed ramp includes the barrel extension and the upper. pm me at BOG or PG, or get in touch with my number 09177542777 if you're interested. Then you can get a regular rifle barrel for the upper with no ramps. The barrel extension and the receiver both have to have the cuts. I'll probably build a pistol out of this one. I checked what I have now. If a barrel comes with the feed ramps could I take them off? AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. For the purposes of this chapter, we'll call the new one the M4, and the old one the AR. what I fear the most is having an m4 ramp upper and then getting a barrel with a rifle ramp.
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