Then you can get a regular rifle barrel for the upper with no ramps. Insert the barrel and sharpie the cut area, then use the right bit on a dremel. Reliability is the main concern for me when I re-barrel this rifle. BUT, I DO NOT TRUST MY LIFE TO THAT WEAPON. They offer a lower, more extensive, and smoother entry for any round of ammo, whether its necessary or not. 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. The magazine lips cannot move, so with these larger diameter cartridges, the bullet tips down lower about the centerline of the bore (half of the diameter increase to be exact). Edited April 27, 2014 by Mark Gale Sorta. Your previous content has been restored. 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. Married pretty well with my Seekins machined lower. Rear side of a CZ-75B pistol barrel showing the (here dirty) feed ramp. Try this little exercise: 1. Guess what? I wont buy a barrel that isnt a wylde 223 556 but Im only now noticing. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. Just put it in and shoot it. I bought a .458 upper to go with it, with the extra internal clearance cut before anodizing. - The Shooter's Log, 2012 SHOT Show Special Report: Del-Ton TRX Rifle and More! I've been thinking about doing sort of an "Early Diemaco C8 carbine" clone build with a C7 style upper receiver. Watch a video about our Modern Series AR barrel: check out the. Anodized red parts. Display as a link instead, Add M4 cuts to Barrel Ext $15.00 We can modify your rifle extension to match the M4 cuts in an upper receiver. M4A1s run at 950 rounds per minute in full auto and even 950+ rounds per minute as the gas port erodes open bigger and bigger with wear and allows them to run even faster and much more violent. Its easier to add feed ramps to the receiver not so easy to add them to the barrel extension. Earlfillmore 13 hr. Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? 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. He had more to say and added some more engineer and gun designer speak too. I picked up a side charging upper from Sundevil last year. The Mission of Cheaper Than Dirt! Machined from 4150 Chrome Moly Vanadium Steel and feature a QPQ corrosion resistant finish and QPQ coated M4 feed ramp extension. Would not feed to save its life! Is it worth the extra 50 bucks?" 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. FN AR-15 5.56X45mm Nato . this is the barrel designed and profiled for the Mark 12 Mod 0 uppers and rifles. Either way is good and both types work great with semi auto only guns. This Kit is made to cut or polish the STEEL Feed Ramps on your Barrel Extension ONLY. The M4 Style Feed ramps And Barrel Extension Provide Consistent Feeding And The Matte Black Manganese Phosphate Finish resists External Corrosion And OxidationLength: 14.70"Model: AR-15Finish: Manganese PhosphateBarrel Type: Carbine LengthBarrel Features: Chrome-LinedManufacturer: FN Mfg Number: 20-100405Model: AR-15 . These Mil-Spec M4 feed ramps are part of the original CNC manufacturing process. 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 was planning on using a Daniel Defense 14.5 pencil barrel, because like the C8 they are CHF, lightweight profile, and .750 at the FSB (And also because quality carbine pencil barrels with .625 gas blocks seem to be in short supplyor else I'd just build a 723 clone.) . Either way is good and both types work great with semi auto only guns. 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. What is an m4 feed ramp? Being a Newbie AR owner ((Ive been an avid gun owner for nearly 50 years), I appreciate the information and visual aids that Im sure will be a big help in enjoying and using this gun platform. Both. 2. A forum community dedicated to drag racing drivers and enthusiasts. They are better! 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. Read Now. The ramp angles are different and changing the profile of the extension doesn't make it something it isn't. Damaged Ak front end Barrel in Trunnion with or without sight bases. Im an old vet, now retired and looking to build some ARs as a hobby to keep me doing something that I will enjoy. When I function tested it the first time with live half-jacketed rounds I had the worst FTF jam I have ever experienced. and add them to non-m4 barrels.? LanceRiley, That puts the cartridge in a position where the extended feed ramp improves the breech-loading design. So, an M4 feed ramp includes the barrel extension and the upper. . 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). Paste as plain text instead, 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. I guess it depends on what your relationship to the necessary shop activities is. Gas block area is .750 diameter. Copyright 2016 - 2023 by AdventureFootstep.com. 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. If your mag catch is at Spec height, you should not have a problem with an M4 cut barrel in a rifle receiver. 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-. Which Model Colt 1911 is For Me? It is removeable with a special wrench and a barrel clamp/vise. Higher pressure equte to parts (bcg, buffer, buffer spring, ROUNDS, etc) experiencing much higher wear/tear. 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 wouldn't be concerned at all with any wear after modifying an upper receiver. Thank you for answering the question do well. So, what is the difference between M4 feed ramps and regular ones? This is one time it's better to go a little too far than to leave an edge for the . I got my help from this thread, and thank you again to ORD. They provide a lower, wider, and smoother entry for any round of ammo, whether its necessary or not. I should have taken my own advice for once. 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. We want you, our readers, to be able to make informed decisions. ago KrinkyDink2 9 hr. However, they do have M4 feed-ramps which is not clone correct. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. M4 Feed ramps on barrel extensions are a solid example. Thats an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. 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 M4 extension with .350 M4 style feed ramps 11 Degree Target Crown Threaded Muzzle 5/8"x24 TPI Weight: 26.5 ounces Ready to drop onto a complete lower receiver. The upper I want to rebarrel is modified for Service Rifle competition so it's not quite as cheap as buying another $89 upper from Aero. Theres a bit more to it than just polishing. Proper maintenance and lubrication. Ballistic Performance of Federal Punch .22 LR Ammunition with the Heritage Barkeep #1063. The M4 was the first (allegedy) carbine length gas system. I like all my guns to be reliable. 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. We reserve the right to edit as appropriate, delete profane, harassing, abusive and spam comments or posts, and block repeat offenders. Feed ramps being m4 or. Also, barrel life is relative. It's best to use rifle/rifle combo or M4/M4. In military situations, it is advantageous for rifles to function with damaged, worn, or less than ideally serviceable magazines. 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. pictures would help. Was sort of worried about how it would run with an 11.5" barrel and mismatched ramps, but it sounds like it should be good to go either way. 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. Press question mark to learn the rest of the keyboard shortcuts. I have done the same, protect the Barrel extension with a layer of electrical tape and carefully file or Dremel the ramps into the aluminum receiver. Single Action and Double Action Which One Is Better For You? -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! In most cases the ramps only help during full auto mode while cycling at a high rate. The Shooter's Log, is to provide informationnot opinionsto our customers and the shooting community. It is milled out of 6061 T6. What is the difference between Modern, Performance, and Premium Series Barrels? Ideally both. I recommend putting any AR-platform firearm together with a matched M4 barrel extension and upper receiver set, just because you can. I have looked and looked and looked. 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. Some barrels I see for sale say they include M4 feed ramps, and some uppers say they include them too. Is one better than the other? Supposedly you'll only notice issues with rapid/auto fire with a configuration like this. M4 can better explain their benefit, although they help with more reliable feeding. 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. Other selections are available for upper, bolt and carrier, charging handle, handguards, flash hiders, and gas blocks. So there's a lot more going on with rounds bouncing up and down in the mags etc. I don't have much to add re: feed ramps, but. 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. Costs about $40-50 to have the feed ramps reprofiled from what I can gather. Whether they materialize or not depends on the direction of the mismatch. All Rights Reserved. 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 angle is going to be key, alot of people attempt to mimic the angle of the barrel feed ramps, this is incorrect. So, lets glide down these lines below to erase your misconceptions about them. Snipers Hide is a community of Snipers of all kinds, focusing on long range shooting, accuracy, and ballistics. You are using an out of date browser. i have the rifle barrel. You want them to match. "C" stamp and CAGE code available. I put together a second AR9 that is having a feeding issue, even if using similar parts as the first one. I am having a tough time finding an in-stock barrel (18 or 20 incher) with a rifle extension on it. Come join the discussion about racing, builds, pro mods, hot rods, events, turbos, nitrous, superchargers, and more! Amazing what happens in a thread over a simple question. Your link has been automatically embedded. All uppers are assembled cleaned and tested before shipping. Please be respectful of others. If I have a rifle ramp upper and get the barrel later and coincidentally will have an m4 ramp. By Yamil Sued August 6, 2021. I just need a little guidance on this and I'm having trouble getting good results from Google. Remember less is more, little by little. Feedramps, proper staking of castle nuts, forward assist (yep went there)S-happens seen it. Editors Note: This article was originally published in January of 2019. The closest brand new barrel you are likely to find is the Windham Weaponry 20 inch 1/7 twist chrome lined barrel. I too built a .458 SOCOM carbine . Installing a Luth-AR Rifle Buffer Tube and an A2 Stock #1041. The mil actually only specs M4 feed ramps for use in its M4s. 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. Then the manufacturer discontinued the barrel. JavaScript is disabled. from my service in the 70s to my personal weapons, all of my ARs are early 1970 slab sided Colt SP1s. All things being equal and having used both weapons extensively, Id rather have the feed Ramps. 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. Upper Receiver, A4, Flat Top, USGI, Numbered, AR-Stoner Upper Receiver Stripped AR-15 A3 Flat-Top Matte, Black River Tactical 16 Cold Hammer Forged Optimum Barrel Accuracy Evaluation. The A2's are pretty reliable guns, but trashed mags can cause them to have malfunctions also. I use it for hunting dogs only. 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! Semi autos run slower than full autos. Only took a few minutes. By using the M4 feed ramps for your firearm, you could pick up an increased percentage of the rounds, and feeding reliability would be improved. BUT if you find someone to grind your feed ramps and they do a good job, post it up and let us know. How long your barrel "lasts" depends on what your accuracy threshold is before you decide it is too bad to keep using. This can lead to a rare but odd situation; barrel and receiver mismatch. Will my A3 upper reciever work with my M4 barrel extention.According to some or your posts they will.Thanks Bill. No need to alter the upper. All we do is dremmel it to match - we dont remove it and grind to any specific angle. M4 16", SBN, 1:7, 5.56 NATO Barrel Specifications: - Caliber: 5.56 NATO (.223 REM) - Gas Tube: Car Add to Cart. Shorter length equates to much higher pressure in the upper receiver. It's best to have M4 ramps on both the upper and barrel. M4 feed ramps are not an original design, they were designed for the M4 In fact, the . Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. For new construction barrels only. You must log in or register to reply here. 3. The M4, and the CAR-15, before it have had similar problems like the ones you mentioned. The last is using the best and right ammo for the job. Questions on how to install your new BA barrel? It's near impossible to replace the carry handle upper I have these days, and finding a colt chrome lined 20" light weight barrel isn't a walk in the park either. Some, me included, have said that the M4 ramps are a help to some of the larger-diameter cartridges in use, such as 6.5 Grendel or .22 Nosler. For a better experience, please enable JavaScript in your browser before proceeding. 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. Just because you can, doesn't mean you should. There's a 7 degree difference between standard and M4 ramps. Thanks! The good idea is that the round, presented at a lower plane, will contact other lower feed ramps and go right on in. I have a 723 build (w/ C7 upper) and a 727 build (A2 upper) that use 14.5" Colt M4 barrels. Required fields are marked *. 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? 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. Avoid Polishing Too Lightly Or Too Roughly Upload or insert images from URL. You cannot paste images directly. /r/ar15 is here for your favorite black gun links, build pics, questions and other tactical or practical information. I've seen that pic, it is a good reference. 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. Clear editor. Powered by Invision Community. You can post now and register later. The ramps are in the barrel extension. pm me at BOG or PG, or get in touch with my number 09177542777 if you're interested. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. again, Thanks. Good call. 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. EDIT: Okay, I understand now! To measure just where the round makes impact on the feed ramps, I did not use any sort of micrometer to measure. We have four combinations here: 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. 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 Metal cases ammunition such as Wolf through an M4 clone? While I've got everything apart, I'm thinking I just want to put an M4 barrel extension on. Dec 17, 2020. This gave it a longer point for the magazine to allow the rounds to come out of the magazine and feed into the chamber. You need to match up barrels to receivers for optimum performance. Press question mark to learn the rest of the keyboard shortcuts. An older-version (or A2-style) feed ramp is cut only on the barrel extension itself (top). Not all mil-spec features advertised on the product information are the real mil-specs. Anything else you want to share about M4 clones would be appreciated, especially when it comes to a reliable rifle. ago Costs about $40-50 to have the feed ramps reprofiled from what I can gather. Your discussions, feedback and comments are welcome here as long as they are relevant and insightful. Little polish. Copyright 1996-2023 AR15.COM LLC. All Rights Reserved. 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. This USGI modification was done to both the barrel extension and the upper receiver, creating a longer and steeper feed ramp. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. Man, its crazy how many of yall have absolutely no idea why you do what you do.