Factory said its fine . 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. The M4 ramps, if I am not mistaken, were originally made to help reduce malfunctions on the M4 carbine. As they are becoming more and more a standard, and certainly do not do any harm to us. Thread: Adding M4 feedramps to A1/C7 upper. Thanks for explaining the feed ramp topic in a couple of different ways. It may not display this or other websites correctly. Thanks! 338 and others not the .308 76251 or 6.5 creedmore which o think should have a.30cal feed ramp.? All Rights Reserved. Feeds flawlessly. Founded by Frank Galli in 2000, Snipers Hide has been offering informational videos, podcasts, and other support to its users in one location. Description. 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. And that the M4s and M4A1s are issued M855 which has a slight difference in bullet shape vs. the older 55gr M193 BALL. There's a 7 degree difference between standard and M4 ramps. Barrels are Douglas 416 stainless steel with 1-7 twist with M4 feed ramps EDIT: Okay, I understand now! In general, all you need to understand is that the M4 feed ramps include the barrel extension and upper receiver. April 23, 2014 in Rifle - Technical. 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. The Fora platform includes forum software by XenForo. I read in Bravo company that there are 2 kinds of flat top upper. Then you can get a regular rifle barrel for the upper with no ramps. 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. Reddit and its partners use cookies and similar technologies to provide you with a better experience. /r/ar15 is here for your favorite black gun links, build pics, questions and other tactical or practical information. Most work performed while-you-wait, evening and saturday appointments available. Does anyone have a follow up that confirms or denies my claim? Ideally both. Previous. There are several, but Steve and the guys at ADCO in OH are one such option (they use the Dremel method, but they do it right as I have seen several first-hand examples of their work and its performance after the fact). No feed ramps. colt A1E1 733 uppers didn't have extended carbine feedramps ? Just because you can, doesn't mean you should. It has ran flawlessly (barring tuning of the gasblock when new) with several different brands of magazines and ammo. It has 2 ramps cut into the receiver to help the rounds feed into the chamber. Amazing what happens in a thread over a simple question. from my service in the 70s to my personal weapons, all of my ARs are early 1970 slab sided Colt SP1s. The extension is the part at the end of the barrel that fits inside the upper. A4 Complete Upper Receiver. It's best to have M4 ramps on both the upper and barrel. 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. 308 m5 using m4 feed ramps, which I belive are for the smaller round like. 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. Brevity matters. BEFORE YOU GO MODIFYING IT, check your headspace.I have a Gibbz upper in my junk drawer because the upper -- for some reason -- wouldn't allow a perfectly good bolt (as checked by Criterion) to headspace correctly on a Criterion barrel, with the bolt installed in the carrier. Thats receivers, bolts, and on down the list of the 100 or so parts that can make up an AR-15. Copyright 2016 - 2023 by AdventureFootstep.com. In case My barrel is rifle ramp it won't be so bad after all. Is getting it as part of the upper better? It's not worth changing the barrel extension on an already finished barrel, getting the new barrel extension to line up correctly with the gas port will probably cost more in gunsmithing/machining fees than buying a new barrel. Installing a Luth-AR Rifle Buffer Tube and an A2 Stock #1041. Share it in the comments section. Rear side of a CZ-75B pistol barrel showing the (here dirty) feed ramp. Press question mark to learn the rest of the keyboard shortcuts. aaargh.. that's the setup I hate to see. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. The best case is to have both an upper and barrel that have the feed ramps. 5. Backing up a ton: Any and all AR-15 barrel extensions have feed ramps. The first reason is that they are, indeed, better. M16's fed pretty well before the M4 feed ramps were introduced. That's an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. Looking For Bear Creek Arsenal Barrels Review? This is why you can use a barrel with an extension with M4 feedramps with a receiver that does not have feedramps, but you cannot use a receiver with M4 feedramps with a barrel with an extension with rifle feedramps. I have looked and looked and looked. well.. it's kinda hard to get stuff in this part of the world. I don't have much to add re: feed ramps, but. They are also 1/7 twist, 4150 steel, chrome lined, and button rifled like the real deal! 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. Dec 17, 2020. [ARCHIVED THREAD] - M4 feed ramp barrel in a non M4 ramp upper. Issues can arise when receivers and barrel extensions are mismatched. Your email address will not be published. Your discussions, feedback and comments are welcome here as long as they are relevant and insightful. If I can correct an issue before it's an issue that is preferred. Looking for a black stripped A1 upper with non m4 feed ramps (just realized the upper I have wont work with my barrel). 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. Thats true overall and good to keep in mind. Come join the discussion about racing, builds, pro mods, hot rods, events, turbos, nitrous, superchargers, and more! Feedramps, proper staking of castle nuts, forward assist (yep went there)S-happens seen it. check out the. 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! To measure just where the round makes impact on the feed ramps, I did not use any sort of micrometer to measure. 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. There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. I replaced the M4 feed ramp barrel with a monolithic feed ramp barrel and no more problems. When carrying out feed ramp polishing, it is crucial to prioritize the frame's angles, which is a critical part of the feed ramp. For instance I was looking at the BCM upper receiver, and it said it had M4 feed ramps machined into the upper. Is one better than the other? True, which is why they're not even needed in semi autos. 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. For use by barrel manufacturers. If your upper isn't showing signs of bullets rubbing on the aluminum under the barrel extension, you should be good with M4 ramps. The Bullet ~ Handguns, Rifles and Shotguns, http://thearguys.com/ar-facts/m4-feed-ramps/. I've seen that pic, it is a good reference. 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. 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. hey bro nice to see you here!!! You wrote that much to make a point that should have taken about 100 words? *Must have a registered ARFCOM account to win. This USGI modification was done to both the barrel extension and the upper receiver, creating a longer and steeper feed ramp. Our 6mm ARC barrel come standard with 1-7.5 Twist, M4 Feed Ramps and gas tube. If a barrel comes with the feed ramps could I take them off? It gives a longer ramp that is less steep into the chamber. And that is the important thing! The M4, and the CAR-15, before it have had similar problems like the ones you mentioned. Not all mil-spec features advertised on the product information are the real mil-specs. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. You also repeated yourself. Any body need a anchor for a very small boat? what does it do?? Anything else you want to share about M4 clones would be appreciated, especially when it comes to a reliable rifle. if you are OK with 3MOA, you might go 20,000 rounds! A couple of times I ended up with the OK set up from the picture above. Costs about $40-50 to have the feed ramps reprofiled from what I can gather. I've seen uppers with and without anodizing on M4 ramps . it seems to me to be about 50/50 with and without. When you need to nail something you use a hammer not a wrench. I just need a little guidance on this and I'm having trouble getting good results from Google. 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. I built the upper using a Mega upper with a Compass Lake 18" barrel. Well, over the course of 5,000 rounds at .40 a round, you spent two grand on ammo. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Owning Best Ruger SR9c Accessories Can Change Your Life. 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. Which Model Colt 1911 is For Me? I like all my guns to be reliable. Given that most of us dont always have perfect access to truly genuine Mil-Spec, mil-standard parts (those actually used in issued fighting tools), were shopping based on a little part trust and a bigger part knowledge. Thank you for answering the question do well. This 20" BCM barrel is machined from SS410 stainless steel. Sorta. Does NOT include pin Both. 2. which is basicallly an m16a1 cut down. M4 extension with .350 M4 style feed ramps 11 Degree Target Crown Threaded Muzzle 5/8"x24 TPI Weight: 26.5 ounces 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. M4 M-4 Feed Ramp Jam with 55 gr grain Bullets, Solution, Fix, AR15 AR-15 Stuck Cartridge iowaunemployment 21K views 10 years ago Comparing AR15 barrels -Faxon vs. Bear Creek arsenal-. All we do is dremmel it to match - we dont remove it and grind to any specific angle. 16" Pre-Ban M4 Profile Barrel Assembly CARBINE Gas System About Upper assembly comes completely head spaced and test fired. M4 Feed ramps on barrel extensions are a solid example. M4 barrel to non M4 receiver is fine, but not the other way around. I will check with compass lake. Most of barrel assemblies and upper receivers on the market now have a present of M4 feed ramps. 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? First of Im not a gunsmith or firearms professional. instead of mil-spec. 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. Went back to the sellers website and found I was not the only one with problems. 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. LanceRiley, One new winner* is announced every week! The tip of the cartridge rarely comes into contact with the upper receiver. Thats an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. AAC and anybody else that has any reasonable expectation of quality and reliability use an M4 feed ramp. I'm a machinist in the aerospace industry and lucky enough to have. Should not be too hard. 50 bucks one way or the other on the barrel ain't squat! Would not feed to save its life! Just put it in and shoot it. The M4 receiver feed ramps are cut at a steeper angle and, as a result, extend down into the receiver wall. The A2's are pretty reliable guns, but trashed mags can cause them to have malfunctions also. 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. Thats why AR10s- And Scar heavies exist for. i have the rifle barrel. I've been thinking about doing sort of an "Early Diemaco C8 carbine" clone build with a C7 style upper receiver. If it's happening regularly, check the magazines you are using for serviceability. I've seen several places say you just need a 1/8" chainsaw sharpening bit and a Dremel to fix it. Feed ramps on barrel extensions are a good example. pictures would help. Modern Series Barrels. A closer look at uppers and barrel extensions. So, an M4 feed ramp includes the barrel extension and the upper. While I've got everything apart, I'm thinking I just want to put an M4 barrel extension on. which is bad combo. 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! By Yamil Sued August 6, 2021. You cannot paste images directly. M4 feed ramps will extend the barrel extension and the upper receiver. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. I checked what I have now. Hasn't misfed yet, through initial break in up through 1k rounds, and that's mag length ammo. Forged 7075-T6 aluminum is harder than a bulls balls. I'll probably build a pistol out of this one. They offer a lower, more extensive, and smoother entry for any round of ammo, whether its necessary or not. i have an extra brand new M4 barrel extension ramp to replace a rifle ramp. I will attest that a rifle upper and a barrel with the M4 feedramps works just fine. 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. The only other time it seems to help is if the mag is feeding the rounds with the bullet slightly angled lower than normal. Absolutely nothing to do with casing diameter, or whatever other weird sht you guys imagine. Required fields are marked *. 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 barrel blanks available are made from 416 Stainless Steel. A couple of times I ended up with the OK set up from the picture above. Display as a link instead, While this gun is a more of novelty build than a "serious use" AR, I intend to use good parts and want it to run as well as my other ARs. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. I've thought about it myself, and I'd like to see test results if any exist, displaying what reliability effect M4 ramps have on other barrel lengths. The barrels also had to be modified. By the time you made it work you spent more time, money, and effort than if you just bought a new barrel or upper. Add M4 cuts to Barrel Ext $15.00 We can modify your rifle extension to match the M4 cuts in an upper receiver. That puts the cartridge in a position where the extended feed ramp improves the breech-loading design. Gun smith said , not head spaced properly. You are using an out of date browser. Instead, I just loaded up each mag with two rounds, and pushed the rounds forward by hand until the tip of . Ballistic Performance of Federal Punch .22 LR Ammunition with the Heritage Barkeep #1063. In military situations, it is advantageous for rifles to function with damaged, worn, or less than ideally serviceable magazines. - 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. This is a big tip, by the way, for pistol-caliber ARs. May 17, 2008 in The Armorer. Get The Best Trigger Pull Gauges To Make Every Shot Count. 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. So there's a lot more going on with rounds bouncing up and down in the mags etc. Those ramps line up with the barrel, which are cut deeper than on a rifle barrel. How long your barrel "lasts" depends on what your accuracy threshold is before you decide it is too bad to keep using. 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. #2. AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. http://www.ar15fornoobs.com/wp-content/uploads/feedramps.jpg. Don't forget read more information about it here! "It will last 5k rounds instead of 4k. Buy AR 15 16" .350 Legend Nitride M4 Profile Barrel 1:16: GunBroker is the largest seller of AR15 Parts Gun Parts All: 974000728 . Caught a deal on a matched barrel and bolt. Whether they materialize or not depends on the direction of the mismatch. My alternative plan is to do exactly as you describe. Read Now. It is milled out of 6061 T6. So the engineers lowered the feed rampa into the receiver. I'm planning on replacing my forearm with a Larue 13.5. A feed ramp is a basic feature of many breech loading cartridge firearm designs. 4. Semi autos run slower than full autos. "A Bad Day At The Range Is Better Than A Great Day Working". 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. Man, its crazy how many of yall have absolutely no idea why you do what you do. If I have a rifle ramp upper and get the barrel later and coincidentally will have an m4 ramp. AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. I'd rather just pay the gunsmith to make it work than hunt down another barrel/upper if possible. Id just get one for that barrel and find a barrel with m4 extension for the upper you already have. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. This can lead to a rare but odd situation; barrel and receiver mismatch. Interesting reading. That is what I tell people when they try to convince me that they need a stainless barrel instead of chrome-moly. Full M4 feed ramps start on the upper and continue onto the barrel extension. Married pretty well with my Seekins machined lower. Go slow and you'll be done in no time. I've shot a good deal of rounds through 20" A2's and I realize they run but you are describing issues that the M4 feed ramps alleviate, that would probably be good to reduce on A2's as well. 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. The ramps are in the barrel extension. On AR9's, I understand the distance between the Mag Follower and the Feed Ramp is a known complication in the design. They . However the DD 14.5 are ideally meant to mate up with M4 style upper receiver feedramps. Will my A3 upper reciever work with my M4 barrel extention.According to some or your posts they will.Thanks Bill. In most cases the ramps only help during full auto mode while cycling at a high rate. I picked up a side charging upper from Sundevil last year. The barrel extension and the receiver both have to have the cuts. Machined from 4150 Chrome Moly Vanadium Steel and feature a QPQ corrosion resistant finish and QPQ coated M4 feed ramp extension. M4 ramps help in feeding in for carbine in full auto. 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 All this basically means is that the ramps continue from the barrel extension down through the upper receiver tonthe magazine. JavaScript is disabled. You can modify the upper, but bear in mind that the un-anodized aluminum surface will be very soft and prone to wear if your particular bullet hits it frequently. Anodized red parts. Your previous content has been restored. 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. I have a 723 build (w/ C7 upper) and a 727 build (A2 upper) that use 14.5" Colt M4 barrels. The M-16/M4 are great weapons. So I'm working on my first build, and I'm a little confused. They guide the bullet up and into the chamber. ago Costs about $40-50 to have the feed ramps reprofiled from what I can gather. When I function tested it the first time with live half-jacketed rounds I had the worst FTF jam I have ever experienced. 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 I prefer them. So, what youre saying is that an M16 upper (not M4 cut) will work with either barrel, but an M4 cut upper will only work with an M4 cut barrel. M4 can better explain their benefit, although they help with more reliable feeding. It's going to a gunsmith to be shortened and rethreaded anyways, can they just grind/polish the feed ramps to match or is it more involved than that? Editors Note: This article was originally published in January of 2019. this is the barrel designed and profiled for the Mark 12 Mod 0 uppers and rifles. 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. Everything that you have on your side to make any weapons more reliable and work when it absolutely needs to is a plus. Remember less is more, little by little. So, an M4 feed ramp includes the barrel extension and the upper. Full M4 feed ramps are on both the upper and barrel extension. 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. 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? But, as with anything else, this work can go too far. so im thinking I might as well just get the unramp upper. 410 stainless is also harder and more corrosion resistant than conventional 416 stainless found in other commercially available precision barrels. 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. 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.
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