These units actually feature the NON-F-Marked (correct) front sight base. All Rights Reserved. M4 feed ramps will extend the barrel extension and the upper receiver. Also, barrel life is relative. 338 and others not the .308 76251 or 6.5 creedmore which o think should have a.30cal feed ramp.? Is one better than the other? Feed Ramps -300BlkTalk The extension is the part at the end of the barrel that fits inside the upper. Snipers Hide is a community of Snipers of all kinds, focusing on long range shooting, accuracy, and ballistics. I have looked and looked and looked. Does anyone have a follow up that confirms or denies my claim? BrianEnos.com Do you need an M4 feed ramp on your AR? Here is some info. JavaScript is disabled. from my service in the 70s to my personal weapons, all of my ARs are early 1970 slab sided Colt SP1s. This has been my concern with modifying the aluminum parts. This USGI modification was done to both the barrel extension and the upper receiver, creating a longer and steeper feed ramp. M4 Feed ramps on barrel extensions are a solid example. It has ran flawlessly (barring tuning of the gasblock when new) with several different brands of magazines and ammo. 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. All comments are held for moderation and will appear after approval. I replaced the M4 feed ramp barrel with a monolithic feed ramp barrel and no more problems. I can assure you that most mods that deviate from the original design aren't 100% reliable. Gun smith said , not head spaced properly. 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. I'll probably build a pistol out of this one. A4 Complete Upper Receiver - 7075 Forged A4 Flat Top Upper Receiver - M4 Feed Ramps Includes: - Add to Cart. ago Costs about $40-50 to have the feed ramps reprofiled from what I can gather. I didnt think anything about it having M4 feed ramps. . Change the angle so that the ramp ends at the exact same point. Reddit and its partners use cookies and similar technologies to provide you with a better experience. Finding the proper upper receiver is your best option. Looking For Bear Creek Arsenal Barrels Review? 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. I will check with compass lake. I can still use the combination. The good idea is that the round, presented at a lower plane, will contact other lower feed ramps and go right on in. As suggested, its best to match the upper and barrel extension no worries that way. 2. You have a rifle barrel. 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. DoubleStar M4 clone opinions | Survivalist Forum So, an M4 feed ramp includes the barrel extension and the upper. BUT, I DO NOT TRUST MY LIFE TO THAT WEAPON. So there's a lot more going on with rounds bouncing up and down in the mags etc. Press question mark to learn the rest of the keyboard shortcuts. Edited April 27, 2014 by Mark Gale 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). #2. I recently built an AR9 (Glock Mags) that has been running flawlessly for about 3-400rds. There's a 7 degree difference between standard and M4 ramps. AR Tech Tip - Checking M4 Ramps for overhang - YouTube I notice that's a Gibbz (or Gibbz-type) upper. The rifle-platform M16s dont use them. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Owning Best Ruger SR9c Accessories Can Change Your Life. I had seen these pix years ago and dismissed the idea of mix and match. 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). So, what is the difference between M4 feed ramps and regular ones? That's an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. Buy AR 15 16" .350 Legend Nitride M4 Profile Barrel 1:16: GunBroker is the largest seller of AR15 Parts Gun Parts All: 974000728 . 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 What's the difference? 2. It is milled out of 6061 T6. By M4 Barrel Extension (M4 Feedramps) - Bravo Company USA 3. When carrying out feed ramp polishing, it is crucial to prioritize the frame's angles, which is a critical part of the feed ramp. Some argue that, factually, its a step to enable a smoother feeding. Caught a deal on a matched barrel and bolt. Feed Ramp Polishing - How To Do It Properly? - Homestead & Prepper By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. But, as with anything else, this work can go too far. M4 ramps help in feeding in for carbine in full auto. 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. 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. 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. what does it do?? You wrote that much to make a point that should have taken about 100 words? Its easier to add feed ramps to the receiver not so easy to add them to the barrel extension. This gave it a longer point for the magazine to allow the rounds to come out of the magazine and feed into the chamber. The parts are interchangeable. The only one I found is LaRue's upper, but it won't work with the hand guard I'm using (Geissele MKIII). 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. so im thinking I might as well just get the unramp upper. Do you have an AR barrel or feed ramp tip? 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. The Fora platform includes forum software by XenForo. So, I had purchased a 458 upper. The ramp angles are different and changing the profile of the extension doesn't make it something it isn't. The M4 ramps, if I am not mistaken, were originally made to help reduce malfunctions on the M4 carbine. They provide a lower, wider, and smoother entry for any round of ammo, whether its necessary or not. All NFA rules apply. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. Notice how the ramp starts on the barrel extension and not in the receiver. How long your barrel "lasts" depends on what your accuracy threshold is before you decide it is too bad to keep using. 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. Either way is good and both types work great with semi auto only guns. 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 . For a better experience, please enable JavaScript in your browser before proceeding. Backing up a ton: Any and all AR-15 barrel extensions have feed ramps. No need to alter the upper. Is getting it as part of the upper better? Full M4 feed ramps start on the upper and continue onto the barrel extension. -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! $101.95. If it's happening regularly, check the magazines you are using for serviceability. Is it kosher to add M4 feed ramps to a standard upper to match an m4 ramped barrel? It may not display this or other websites correctly. Barrels are Douglas 416 stainless steel with 1-7 twist with M4 feed ramps I like all my guns to be reliable. Create an account to follow your favorite communities and start taking part in conversations. Costs about $40-50 to have the feed ramps reprofiled from what I can gather. [ARCHIVED THREAD] - M4 feed ramp barrel in a non M4 ramp upper. Add M4 cuts to Barrel Ext $15.00 We can modify your rifle extension to match the M4 cuts in an upper receiver. 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). You must log in or register to reply here. Only took a few minutes. Douglas 5.56 Stainless Steel Barrel 18" - 1~7 twist Barrel customizations are also available. Product Details Douglas 18" Flat Dark Earth Cerakoted 416 stainless steel barrel with 1-7 twist and M4 feed ramps. Ballistic Performance of Federal Punch .22 LR Ammunition with the Heritage Barkeep #1063. 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? AR-15 Feed Ramp Problems - School of the American Rifle I've seen uppers with and without anodizing on M4 ramps . it seems to me to be about 50/50 with and without. Just put it in and shoot it. Feels like a silly question now that it makes sense. 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. It's best to have M4 ramps on both the upper and barrel. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. I read in Bravo company that there are 2 kinds of flat top upper. With the increased use of larger-diameter cased cartridges, the M4 feed ramps are proving their values when using them in those cartridges. 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? AR15 20 inch Upper Receiver Group (SS) w/ Handguard | BCM AR15 Feed Ramp Cut & Polish Kit - School of the American Rifle this is the barrel designed and profiled for the Mark 12 Mod 0 uppers and rifles. What is the difference between Modern, Performance, and Premium Series Barrels? I prefer them. Thread: Adding M4 feedramps to A1/C7 upper. April 23, 2014 in Rifle - Technical. The barrel extension and the receiver both have to have the cuts. FWIW one of my rifles has M4 feed ramps on the barrel and no M4 feed ramps on the upper and it has functioned just fine. Reddit and its partners use cookies and similar technologies to provide you with a better experience. The barrel is supposed to have the M4 feed ramps. Oh well, as I tell my lovely and understanding bride, guns are relatively free. it's the ammo and training that cost real money. Absolutely nothing to do with casing diameter, or whatever other weird sht you guys imagine. I've been thinking about doing sort of an "Early Diemaco C8 carbine" clone build with a C7 style upper receiver. No feed ramps. If this is your first visit, be sure to 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. My experience with ARs is all A-1s. The barrels also had to be modified. 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. The best case is to have both an upper and barrel that have the feed ramps. The Shooter's Log, is to provide informationnot opinionsto our customers and the shooting community. Description. You can put a M4 barrel and non-M4 receiver together, but you can't mismatch them the other way. 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. pm me at BOG or PG, or get in touch with my number 09177542777 if you're interested. 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 built the upper using a Mega upper with a Compass Lake 18" barrel. Read Now. 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 closer look at uppers and barrel extensions. Its highly recommended to put any AR-platform firearm together with a matching M4 barrel extension and upper receiver set. The difference between standard feed ramps and M4 ramps is easy to see. Whether they materialize or not depends on the direction of the mismatch. AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. Brevity matters. Regular feed ramps are cuts into the barrel extension only, which allows guiding the round into the chamber during loading, making them a fundamental feature of many breech-loading firearm designs. Would not feed to save its life! Questions on how to install your new BA barrel? In most cases the ramps only help during full auto mode while cycling at a high rate. 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?
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