When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Some gun owners believe that the M4 ramps can help for some of the larger-diameter cartridges in use. colt A1E1 733 uppers didn't have extended carbine feedramps ? The M4 style feed ramps and barrel extension provide consistent feeding and the matte black Manganese Phosphate finish resists external corrosion and oxidation. Insert the barrel and sharpie the cut area, then use the right bit on a dremel. You cannot paste images directly. i have the rifle barrel. A shorter gas tube means reduced gas pressure, and we all know what happens when there isn't enough pressure to cycle the bolt carrier group properly. 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. Would not feed to save its life! The Shooter's Log, is to provide informationnot opinionsto our customers and the shooting community. If your upper isn't showing signs of bullets rubbing on the aluminum under the barrel extension, you should be good with M4 ramps. Reach in through the ejection port and slide the on deck cartridge about 1/4 inch forward and observe the tip of the bullet in relationship to the barrel extension. aaargh.. that's the setup I hate to see. A closer look at uppers and barrel extensions. which is bad combo. I recently built an AR9 (Glock Mags) that has been running flawlessly for about 3-400rds. Contents: 1 Diamond Burr (For Colt 2 Stage Ramps) 1 Cut Lube (For Diamond Burr) 1 Bullet Stone (For Reshaping . 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. Load a magazine with two or three rounds, lock the bolt group back on your rifle or carbine and insert the magazine. Upload or insert images from URL. - The Shooter's Log, 2012 SHOT Show Special Report: Del-Ton TRX Rifle and More! All uppers are assembled cleaned and tested before shipping. Del-Ton, Inc. AR-15 16" M4 Custom Upper Also, barrel life is relative. Anodized red parts. My experience with ARs is all A-1s. It has 2 ramps cut into the receiver to help the rounds feed into the chamber. I'm assuming that you only need the ramps from one or the other. 11.5", SBN, 1:7, 5.56 NATO Barrel They guide the bullet up and into the chamber. Earlfillmore 13 hr. No Feed Ramps on upper? - General Discussion - 308AR.com Community Paste as plain text instead, I bought a .458 upper to go with it, with the extra internal clearance cut before anodizing. A feed ramp is a basic feature of many breech loading cartridge firearm designs. are all barrels w/ m4 feed ramps?? The difference between standard feed ramps and M4 ramps is easy to see. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. Semi autos run slower than full autos. Using an upper with M4 feed ramps with a barrel that does not have them will lead to feed problems as it creates a ledge/lip that can catch the bullet tip as it tries to feed. By the time you made it work you spent more time, money, and effort than if you just bought a new barrel or upper. The Differences Between an M4 and an AR15 - Music Raiser 30 cal. AAC and anybody else that has any reasonable expectation of quality and reliability use an M4 feed ramp. You can post now and register later. However Ive built numerous ar15 and lr308 rifles and pistols. M4 feed ramps are not an original design, they were designed for the M4 In fact, the . He had more to say and added some more engineer and gun designer speak too. 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. FN AR-15 5.56 NATO 20" Hammer Forged Barrel - Black Barrel Length: 16" Barrel Material: 4150V Chrome Moly Vanadium Steel Barrel Finish: Phosphate Barrel Profile: M4 Chamber: 5.56 NATO Twist Rate: 1 in 7" Extension: M4 Gas System: Carbine-Length Gas Block Type: Low Profile .750" Diameter Upper Receiver: Forged 7075 T6 Aluminum Receiver Style: M4 Flat top with feed ramps Receiver Finish: Hardcoat Anodized An older-version (or A2-style) feed ramp is cut only on the barrel extension itself (top). Description. Create an account to follow your favorite communities and start taking part in conversations. M4 barrel to non M4 receiver is fine, but not the other way around. I've been thinking about doing sort of an "Early Diemaco C8 carbine" clone build with a C7 style upper receiver. You need to match up barrels to receivers for optimum performance. I got my help from this thread, and thank you again to ORD. check out the. While I've got everything apart, I'm thinking I just want to put an M4 barrel extension on. Get The Best Trigger Pull Gauges To Make Every Shot Count. Is it worth the extra 50 bucks?" M4 feed ramp barrel in a non M4 ramp upper - AR15.COM [ARCHIVED THREAD] - M4 feed ramp barrel in a non M4 ramp upper. Copyright 2016 - 2023 by AdventureFootstep.com. I use it for hunting dogs only. Feed ramp - Wikipedia Which Model Colt 1911 is For Me? Reliability is the main concern for me when I re-barrel this rifle. Copyright 1996-2023 AR15.COM LLC. Create an account to follow your favorite communities and start taking part in conversations. You need to match up barrels to receivers for optimum performance. Press J to jump to the feed. 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. I had seen these pix years ago and dismissed the idea of mix and match. Polishing the edges of the chamber mouth to remove the edges of that chamfer will. Whether they materialize or not depends on the direction of the mismatch. BUT if you find someone to grind your feed ramps and they do a good job, post it up and let us know. The manufacturer said they had sold hundreds of barrels with out problems reported. This can lead to a rare but odd situation; barrel and receiver mismatch. This USGI modification was done to both the barrel extension and the upper receiver, creating a longer and steeper feed ramp. In most cases the ramps only help during full auto mode while cycling at a high rate. Its not a big deal but still an important thing to remember and understand. No need to alter the upper. No feed ramps. Questions on how to install your new BA barrel? Went back to the sellers website and found I was not the only one with problems. You also repeated yourself. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. That is what I tell people when they try to convince me that they need a stainless barrel instead of chrome-moly. Its highly recommended to put any AR-platform firearm together with a matching M4 barrel extension and upper receiver set. Featuring hand lapped 1/8 twist rate button rifling and M4 feed ramps barrel extensions, the 410 stainless barrel gives the shooter the best balance of weight and accuracy. You want them to match. All this basically means is that the ramps continue from the barrel extension down through the upper receiver tonthe magazine. It's best to have M4 ramps on both the upper and barrel. 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. The information provided here does not represent the views of Cheaper Than Dirt! Seems like it should work to me, but be a real challenge to keep clean and be damned ugly to boot. The ramps on the regular rifle-type extension are cut just to the edge of the extension. 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? Feed ramps on barrel extensions are a good example. You have the option of barrel type, thread, fluting, finish type and to add a match bolt. 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. 4. For instance I was looking at the BCM upper receiver, and it said it had M4 feed ramps machined into the upper. Only took a few minutes. The M4 was the first (allegedy) carbine length gas system. Both. If your magazines are set up correctly, and the feed lip edges polished smooth, each round fed from the magazine will go directly into the chamber. Seems counter intuitive to recommend an M4 cut upper, especially if the barrel Im looking at has the rifle feed ramp (not M4 cut). 6.5 Grendel Type 2 | 16" Black Nitride | 1:8 Twist Carbine Length Gas If you want precision, dont look to the mil-spec gun, look to the one that is popular in 3-gun competitions, at Thunder Ranch, etc. 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. I too built a .458 SOCOM carbine . I'm lookin for a clear definition as to what they are, and what they do to enhance a given rifle's performance? That's an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. Read Now. DSA has fat top, Mueller, non feed ramp uppers for $40. Seems M4 is all the rage these days. 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. 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 good idea is that the round, presented at a lower plane, will contact other lower feed ramps and go right on in. Sent back again. To conclude, the M4 feed ramps bring a lot of improvements to the AR-platform firearms. Single Action and Double Action Which One Is Better For You? Site towers are not "F" marked SPECS: Length- 14.5". /r/ar15 is here for your favorite black gun links, build pics, questions and other tactical or practical information. What is the difference between Modern, Performance, and Premium Series Barrels? Guess what? FN AR15 barrels are hammer forged using the same proprietary high-grade Chrome Moly Vanadium steel used in FN's venerable machinegun barrels produced to handle the punishment of . If I can correct an issue before it's an issue that is preferred. M4 Feed ramps on barrel extensions are a solid example. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. Just because you can, doesn't mean you should. The tip of the cartridge rarely comes into contact with the upper receiver. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. However the DD 14.5 are ideally meant to mate up with M4 style upper receiver feedramps. They are also 1/7 twist, 4150 steel, chrome lined, and button rifled like the real deal! Backing up a ton: The ramps on regular barrel extension are cut just to the edges, while the M4 feed ramps have deeper cuts in the M4-spec upper receiver. The ramps are in the barrel extension. All things being equal and having used both weapons extensively, Id rather have the feed Ramps. To measure just where the round makes impact on the feed ramps, I did not use any sort of micrometer to measure. Konza Defender M-LOK 5.56 16" Rifle - $399.99 | gun.deals 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? Related: If you are using a Ar rifle, best green laser sight is good choice for hunting. Gas block area is .750 diameter. 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. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Owning Best Ruger SR9c Accessories Can Change Your Life. - 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. Your discussions, feedback and comments are welcome here as long as they are relevant and insightful. If you have a bolt that you would like to use you are welcome to ship it to us for accurate headspace. Interesting reading. I put together a second AR9 that is having a feeding issue, even if using similar parts as the first one. Some argue that, factually, its a step to enable a smoother feeding. Making a non M4 feed ramp barrel work in an M4 feed ramp upper. This 20" BCM barrel is machined from SS410 stainless steel. 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. One new winner* is announced every week! 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. M4 Barrel Extension (M4 Feedramps) - Bravo Company USA You absolutely do not want it the other way around however. The upper is designed to have two levels of top rails for mounting of night vision in front of scopes. The best case is to have both an upper and barrel that have the feed ramps. Surplus Colt 14.5 M4 SOCOM Carbine Barrel 1/7 Twist First of Im not a gunsmith or firearms professional. Pasted as rich text. Bullets tend to bump, snag, and stub on these guns. AR-15 Barrel Extension Question - Sniper's Hide Forum i have an extra brand new M4 barrel extension ramp to replace a rifle ramp. 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. 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 angle is going to be key, alot of people attempt to mimic the angle of the barrel feed ramps, this is incorrect. 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 Either way is good and both types work great with semi auto only guns.