When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. Related: If you are using a Ar rifle, best green laser sight is good choice for hunting. I prefer them. Having been in military supply, I know that what the mil-spec means: it gets the minimum job done for thousands (millions) of parts/systems. Feed ramps on barrel extensions are a good example. Not all mil-spec features advertised on the product information are the real mil-specs. Just because you can, doesn't mean you should. Married pretty well with my Seekins machined lower. Clear editor. How long your barrel "lasts" depends on what your accuracy threshold is before you decide it is too bad to keep using. Thats true overall and good to keep in mind. So I'm working on my first build, and I'm a little confused. 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. The best case is to have both an upper and barrel that have the feed ramps. 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. You have the option of barrel type, thread, fluting, finish type and to add a match bolt. You want them to match. 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! Home Firearms Figuring Out Feed Ramps. 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 notice that's a Gibbz (or Gibbz-type) upper. I use it for hunting dogs only. Thats an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. Try this little exercise: 1. My experience with ARs is all A-1s. 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 Lol. The closest brand new barrel you are likely to find is the Windham Weaponry 20 inch 1/7 twist chrome lined barrel. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. I can assure you that most mods that deviate from the original design aren't 100% reliable. - 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. Will my A3 upper reciever work with my M4 barrel extention.According to some or your posts they will.Thanks Bill. Full M4 feed ramps start on the upper and continue onto the barrel extension. Barrel customizations are also available. Any use of this content without express written consent is prohibited. 1 is a standard and the other for use with m4 feed ramp barrels. Supposedly you'll only notice issues with rapid/auto fire with a configuration like this. M16s and M16-A1s run at 750 rounds per minute in full auto. Press question mark to learn the rest of the keyboard shortcuts. M4 Feed ramps on barrel extensions are a solid example. Feed ramps being m4 or. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. I've seen uppers with and without anodizing on M4 ramps . it seems to me to be about 50/50 with and without. Went back to the sellers website and found I was not the only one with problems. On AR9's, I understand the distance between the Mag Follower and the Feed Ramp is a known complication in the design. Proper maintenance and lubrication. 410 stainless is also harder and more corrosion resistant than conventional 416 stainless found in other commercially available precision barrels. A feed ramp is a basic feature of many breech loading cartridge firearm designs. We have four combinations here: FFL Fax: 866-721-8691. AR9 - Help diagnosing feeding issue. Remember less is more, little by little. I'm a machinist in the aerospace industry and lucky enough to have. Site towers are not "F" marked SPECS: Length- 14.5". But, as with anything else, this work can go too far. Experts advise on 31 degrees+30 minus-zip. 's blog. May 17, 2008 in The Armorer. That is what I tell people when they try to convince me that they need a stainless barrel instead of chrome-moly. Would not feed to save its life! . i have an extra brand new M4 barrel extension ramp to replace a rifle ramp. Snipers Hide is a community of Snipers of all kinds, focusing on long range shooting, accuracy, and ballistics. EDIT: Okay, I understand now! from my service in the 70s to my personal weapons, all of my ARs are early 1970 slab sided Colt SP1s. You will be able to leave a comment after signing in, AR15Armory.com Its also recommended you polish the ramps once youve achieved the appropriate angle. If it was some flat top + 16" FSB barrel id just swap upper/barrel, but this is a little more challenging to do that with. 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. First of Im not a gunsmith or firearms professional. My alternative plan is to do exactly as you describe. are all barrels w/ m4 feed ramps?? You are using an out of date browser. Looking For Bear Creek Arsenal Barrels Review? 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). 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. Reddit and its partners use cookies and similar technologies to provide you with a better experience. 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. I just need a little guidance on this and I'm having trouble getting good results from Google. Create Account; Log Out ; Log In ; Wishlist 0; Shopping Cart 0; Home; About All things being equal and having used both weapons extensively, Id rather have the feed Ramps. It's an interesting question. 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. I'll probably build a pistol out of this one. *Must have a registered ARFCOM account to win. It is removeable with a special wrench and a barrel clamp/vise. Hasn't misfed yet, through initial break in up through 1k rounds, and that's mag length ammo. Those ramps line up with the barrel, which are cut deeper than on a rifle barrel. M4 extension with .350 M4 style feed ramps 11 Degree Target Crown Threaded Muzzle 5/8"x24 TPI Weight: 26.5 ounces Brevity matters. 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. Feeds flawlessly. When I function tested it the first time with live half-jacketed rounds I had the worst FTF jam I have ever experienced. As they are becoming more and more a standard, and certainly do not do any harm to us. 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. 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. 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. The Bullet ~ Handguns, Rifles and Shotguns, http://thearguys.com/ar-facts/m4-feed-ramps/. If it's happening regularly, check the magazines you are using for serviceability. For someone who is new at trying to understand feed ramps it helps to read a couple different explanations. Damaged Ak front end Barrel in Trunnion with or without sight bases. Polishing the edges of the chamber mouth to remove the edges of that chamfer will. 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). Good call. I should have taken my own advice for once. I've seen that pic, it is a good reference. The upper is designed to have two levels of top rails for mounting of night vision in front of scopes. what I fear the most is having an m4 ramp upper and then getting a barrel with a rifle ramp. which is basicallly an m16a1 cut down. Additionally, in this increasingly specialized world of AR-15 parts that we live in, there are proprietary feed ramp cuts used for some alternate cartridges, such as .458 SOCOM. So I called. Barrel, sight and trigger work on most pistols and shotguns. Dec 17, 2020. For a better experience, please enable JavaScript in your browser before proceeding. There is a picture of the various options, hopefully another poster can link them. What's the difference? 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. The dimensions are different between the two, so theyd have to change some things to the feed ramps dimensions. 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. There's a 7 degree difference between standard and M4 ramps. Barrel is medium SPR profiled barrel, threaded with a 1/2-28 thread for the AE brakes and collar. The Shooter's Log, is to provide informationnot opinionsto our customers and the shooting community. M16's fed pretty well before the M4 feed ramps were introduced. 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. I put together a second AR9 that is having a feeding issue, even if using similar parts as the first one. - The Shooter's Log, 2012 SHOT Show Special Report: Del-Ton TRX Rifle and More! Not saying a really good gunsmith cant do it, just that theres a bit of an involved process. SKU: BCM-URG-M4-16 Features: M4 Feed Ramp Barrel Extension Caliber: 5.56 NATO Barrel Length: 16in Barrel Style: Standard Handguard: None BCM M4 Handguards (Double Heat Shield) - Black + $15.00 PKMR (Polymer KeyMod Rail) Carbine Length - Black + $24.95 PKMR (Polymer KeyMod Rail) Carbine Length - Flat Dark Earth + $24.95 Stock Status: Out of stock Get The Best Trigger Pull Gauges To Make Every Shot Count. For a better experience, please enable JavaScript in your browser before proceeding. If your mag catch is at Spec height, you should not have a problem with an M4 cut barrel in a rifle receiver. I am glad to know that I need to look for changes in design and the differences in the A2 and A4 feed ramp / rails. The mil actually only specs M4 feed ramps for use in its M4s. M4 feed ramps are not an original design, they were designed for the M4 In fact, the . Again, youll find plenty of videos on spooling up hand grinders to remedy feed ramp and ejection port issues with these larger cartridges, but I strongly suggest going factory-done aftermarket. All Rights Reserved. Create an account to follow your favorite communities and start taking part in conversations.

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