It was in the last few issues of SAR. Factory said its fine . Caught a deal on a matched barrel and bolt. All this basically means is that the ramps continue from the barrel extension down through the upper receiver tonthe magazine. 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. Thats why AR10s- And Scar heavies exist for. which is bad combo. What's the difference? 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! - The Shooter's Log, 2012 SHOT Show Special Report: Del-Ton TRX Rifle and More! When I function tested it the first time with live half-jacketed rounds I had the worst FTF jam I have ever experienced. 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. Now move move the on deck cartridge forward to the 3/8 of inch position and again note the position of the tip of the bullet in relationship to the barrel extension. However Ive built numerous ar15 and lr308 rifles and pistols. Powered by Invision Community, M4-style barrel extension with Rifle-type upper. Notice how the ramp starts on the barrel extension and not in the receiver. 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. These Mil-Spec M4 feed ramps are part of the original CNC manufacturing process. I wouldn't be concerned at all with any wear after modifying an upper receiver. I have a non ramped barrel in a ramped upper, feeds fine. Brevity matters. You have a rifle barrel. Which Model Colt 1911 is For Me? 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. 338 and others not the .308 76251 or 6.5 creedmore which o think should have a.30cal feed ramp.? They provide a lower, wider, and smoother entry for any round of ammo, whether its necessary or not. By Inadequate knowledge about these feed ramps can lead to lots of problems with barrels because they are essential parts to guide the bullet up and into the chamber. Costs about $40-50 to have the feed ramps reprofiled from what I can gather. Any use of this content without express written consent is prohibited. It's best to use rifle/rifle combo or M4/M4. 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). Gas block area is .750 diameter. 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. if you are OK with 3MOA, you might go 20,000 rounds! I think your mistaking that with adding ramps to the receiver. -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! There's a 7 degree difference between standard and M4 ramps. /r/ar15 is here for your favorite black gun links, build pics, questions and other tactical or practical information. 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. What is an m4 feed ramp? The dimensions are different between the two, so theyd have to change some things to the feed ramps dimensions. Clear editor. Home Firearms Figuring Out Feed Ramps. Guess what? 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. Then you can get a regular rifle barrel for the upper with no ramps. They are also 1/7 twist, 4150 steel, chrome lined, and button rifled like the real deal! I had seen these pix years ago and dismissed the idea of mix and match. EDIT: Okay, I understand now! 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. Polishing the edges of the chamber mouth to remove the edges of that chamfer will. All uppers are assembled cleaned and tested before shipping. 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 I put together a second AR9 that is having a feeding issue, even if using similar parts as the first one. That is what I tell people when they try to convince me that they need a stainless barrel instead of chrome-moly. Editors Note: This article was originally published in January of 2019. The A2's are pretty reliable guns, but trashed mags can cause them to have malfunctions also. They offer a lower, more extensive, and smoother entry for any round of ammo, whether its necessary or not. 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? If I have a rifle ramp upper and get the barrel later and coincidentally will have an m4 ramp. Feeds flawlessly. By If it's happening regularly, check the magazines you are using for serviceability. 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. Little polish. Most work performed while-you-wait, evening and saturday appointments available. This gave it a longer point for the magazine to allow the rounds to come out of the magazine and feed into the chamber. Just put it in and shoot it. No feed ramps. All NFA rules apply. Ideally both. Is getting it as part of the upper better? The M4 ramps, if I am not mistaken, were originally made to help reduce malfunctions on the M4 carbine. Required fields are marked *. 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. 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. They are better! check out the. 5. Load a magazine with two or three rounds, lock the bolt group back on your rifle or carbine and insert the magazine. However, they do have M4 feed-ramps which is not clone correct. http://www.ar15fornoobs.com/wp-content/uploads/feedramps.jpg. Come join the discussion about racing, builds, pro mods, hot rods, events, turbos, nitrous, superchargers, and more! Should not be too hard. All things being equal and having used both weapons extensively, Id rather have the feed Ramps. Proper maintenance and lubrication. Can I use a barrel with M4 feed ramps with an upper that isnt M4 matched? This space is for pictures of "retro" Stoner rifles and completed or partial retro AR-15 builds, as well as discussions about either. I should have taken my own advice for once. M4 feed ramps. Ar-15 Manufacturers Should Be Avoided: Which Should You Buy? Barrel customizations are also available. Thank you for answering the question do well. Go slow and you'll be done in no time. All Rights Reserved. The tip of the cartridge rarely comes into contact with the upper receiver. 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. Go back to writing school. 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. If you have a bolt that you would like to use you are welcome to ship it to us for accurate headspace. Notify me of follow-up comments by email. However, its rare now to find an upper receiver or a ready-to-go barrel that doesnt have the M4 cuts. The barrels also had to be modified. The mil actually only specs M4 feed ramps for use in its M4s. Most of barrel assemblies and upper receivers on the market now have a present of M4 feed ramps. Barrel is medium SPR profiled barrel, threaded with a 1/2-28 thread for the AE brakes and collar. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. I read in Bravo company that there are 2 kinds of flat top upper. A4 Complete Upper Receiver. I replaced the M4 feed ramp barrel with a monolithic feed ramp barrel and no more problems. The closest brand new barrel you are likely to find is the Windham Weaponry 20 inch 1/7 twist chrome lined barrel. I got my help from this thread, and thank you again to ORD. Thanks! what I fear the most is having an m4 ramp upper and then getting a barrel with a rifle ramp. Our 6.5 Grendel Black Nitride rifle barrels are made from the finest 4150 Chrome Moly Vanadium and precisely rifled for high accuracy at a great price. M4 16", SBN, 1:7, 5.56 NATO Barrel Specifications: - Caliber: 5.56 NATO (.223 REM) - Gas Tube: Car Add to Cart. And that the M4s and M4A1s are issued M855 which has a slight difference in bullet shape vs. the older 55gr M193 BALL. 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. If a barrel comes with the feed ramps could I take them off? 3. 1 is a standard and the other for use with m4 feed ramp barrels. Higher pressure equte to parts (bcg, buffer, buffer spring, ROUNDS, etc) experiencing much higher wear/tear. Don't ever put non M4 ramped barrel on a M4 ramped upper receiver. So, an M4 feed ramp includes the barrel extension and the upper. Not saying a really good gunsmith cant do it, just that theres a bit of an involved process. Recommend using a gunsmith this route too if you are not comfortable. You want them to match. 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. To conclude, the M4 feed ramps bring a lot of improvements to the AR-platform firearms. 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. Some argue that, factually, its a step to enable a smoother feeding. Gun smith said , not head spaced properly. Jams and misfires. Your link has been automatically embedded. There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. 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. Full M4 feed ramps start on the upper and continue onto the barrel extension. I can assure you that most mods that deviate from the original design aren't 100% reliable. Copyright 1996-2023 AR15.COM LLC. so im thinking I might as well just get the unramp upper. You can put a M4 barrel and non-M4 receiver together, but you can't mismatch them the other way. Thats true overall and good to keep in mind. You are using an out of date browser. Sorta. So I'm working on my first build, and I'm a little confused. Watch a video about our Modern Series AR barrel: I bought a .458 upper to go with it, with the extra internal clearance cut before anodizing. and add them to non-m4 barrels.? My factory JP CTR-02 has the appearance of the bottom right picture in the post above, M4 barrel extension in a rifle receiver, and there is not a mark on the aluminum under the barrel extension. I'm a machinist in the aerospace industry and lucky enough to have. 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 Bullet ~ Handguns, Rifles and Shotguns, http://thearguys.com/ar-facts/m4-feed-ramps/. If this is your first visit, be sure to
M4 extension with .350 M4 style feed ramps 11 Degree Target Crown Threaded Muzzle 5/8"x24 TPI Weight: 26.5 ounces Full M4 feed ramps start on the upper and continue onto the barrel extension. A couple of times I ended up with the OK set up from the picture above. . 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. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. How long your barrel "lasts" depends on what your accuracy threshold is before you decide it is too bad to keep using. If you don't clean it but demand 3/4MOA you might get 1,500. 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 (theyre lowered). Avoid Polishing Too Lightly Or Too Roughly Supposedly you'll only notice issues with rapid/auto fire with a configuration like this. 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. Issues can arise when receivers and barrel extensions are mismatched. They guide the bullet up and into the chamber. Konza Defender M-LOK 5.56 16" Rifle 1x7 FEATURES: 16" 4150 Nitride 1x7 5.56 Barrel T-Marked Upper with M4 Feed Ramps Steel Micro Gas Block, and Carbine Length Gas Tube 15" 7075 T6 Aluminum Free Float M-LOK Hand Guard A2 Muzzle Break BCG is an M16 Style Nitride QPQ Finish Charging Handle Mil-Spec 6 Position Mil-Spec Diameter Stock They aid in feeding the round into the chamber from the magazine more easily, which make uppers and barrel extension matched. 30 cal. Single Action and Double Action Which One Is Better For You? The trust part is accepting claims of USGI-spec parts actually being done to not only blueprint dimensions, but also made from the correct materials treated to the same processes. You also repeated yourself. Snipers Hide is a community of Snipers of all kinds, focusing on long range shooting, accuracy, and ballistics. The barrel blanks available are made from 416 Stainless Steel. Create Account; Log Out ; Log In ; Wishlist 0; Shopping Cart 0; Home; About Description Genuine 14.5" SOCOM, carbine length gas system barrel from Colt. i have an extra brand new M4 barrel extension ramp to replace a rifle ramp. In case My barrel is rifle ramp it won't be so bad after all. This USGI modification was done to both the barrel extension and the upper receiver, creating a longer and steeper feed ramp. "C" stamp and CAGE code available. 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 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 the rifle barrel. 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. Either way is good and both types work great with semi auto only guns. 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. The M4, and the CAR-15, before it have had similar problems like the ones you mentioned. Other selections are available for upper, bolt and carrier, charging handle, handguards, flash hiders, and gas blocks. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. You cannot paste images directly. Any body need a anchor for a very small boat? Anything else you want to share about M4 clones would be appreciated, especially when it comes to a reliable rifle. I will attest that a rifle upper and a barrel with the M4 feedramps works just fine. It's best to use rifle/rifle combo or M4/M4. Here you can see an upper with "rifle" feedramps. 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. However, I have seen more than a few basement gunsmith hackjobs using a dremel, some Jack Daniels/liquid courage, and an unsteady hand that have made a total, unrepairable mess of the job. In most cases the ramps only help during full auto mode while cycling at a high rate. 2. 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. The best case is to have both an upper and barrel that have the feed ramps. I'll probably build a pistol out of this one. ago KrinkyDink2 9 hr. Looking for a black stripped A1 upper with non m4 feed ramps (just realized the upper I have wont work with my barrel). Mil-spec is good for the masses, and if you want the job done it is a great start. Press J to jump to the feed. pictures would help. Please be respectful of others. 2. #2. So, I had purchased a 458 upper. It is removeable with a special wrench and a barrel clamp/vise. 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. Is one better than the other? AAC and anybody else that has any reasonable expectation of quality and reliability use an M4 feed ramp. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Owning Best Ruger SR9c Accessories Can Change Your Life. Hasn't misfed yet, through initial break in up through 1k rounds, and that's mag length ammo. this is the barrel designed and profiled for the Mark 12 Mod 0 uppers and rifles. They . The parts are interchangeable. "It will last 5k rounds instead of 4k. 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. The Fora platform includes forum software by XenForo. Theres a bit more to it than just polishing. You will be able to leave a comment after signing in, AR15Armory.com The information provided here does not represent the views of Cheaper Than Dirt! Its easier to add feed ramps to the receiver not so easy to add them to the barrel extension. 4. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. If you have an account, sign in now to post with your account. I've seen that pic, it is a good reference. Machined from 4150 Chrome Moly Vanadium Steel and feature a QPQ corrosion resistant finish and QPQ coated M4 feed ramp extension. My experience with ARs is all A-1s. Reddit and its partners use cookies and similar technologies to provide you with a better experience. Thats receivers, bolts, and on down the list of the 100 or so parts that can make up an AR-15. Interesting reading. 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 manufacturer said they had sold hundreds of barrels with out problems reported. As they are becoming more and more a standard, and certainly do not do any harm to us. I suggest you get a rifle receiver. And that is the important thing! Press J to jump to the feed. In general, all you need to understand is that the M4 feed ramps include the barrel extension and upper receiver. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. Seems like it should work to me, but be a real challenge to keep clean and be damned ugly to boot. Does it make a big difference? I'm planning on replacing my forearm with a Larue 13.5. The difference between standard feed ramps and M4 ramps is easy to see. Description. Barrel, sight and trigger work on most pistols and shotguns. Damaged Ak front end Barrel in Trunnion with or without sight bases. There is a picture of the various options, hopefully another poster can link them. However the DD 14.5 are ideally meant to mate up with M4 style upper receiver feedramps. Absolutely nothing to do with casing diameter, or whatever other weird sht you guys imagine. This is one time it's better to go a little too far than to leave an edge for the . . The first reason is that they are, indeed, better. I recently built an AR9 (Glock Mags) that has been running flawlessly for about 3-400rds. In short, if you have a Dremmel you can do it yourself. 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. Full M4 feed ramps are on both the upper and barrel extension. We want you, our readers, to be able to make informed decisions. I didnt think anything about it having M4 feed ramps. Our 6mm ARC barrel come standard with 1-7.5 Twist, M4 Feed Ramps and gas tube. M4 feed ramps will extend the barrel extension and the upper receiver. For a better experience, please enable JavaScript in your browser before proceeding. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. JavaScript is disabled.