Man, its crazy how many of yall have absolutely no idea why you do what you do. which is bad combo. Seems M4 is all the rage these days. Try this little exercise: 1. 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? 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. He had more to say and added some more engineer and gun designer speak too. Copyright 2016 - 2023 by AdventureFootstep.com. They are better! 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. 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 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. 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. Feed ramps on barrel extensions are a good example. 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. I'm a machinist in the aerospace industry and lucky enough to have. Married pretty well with my Seekins machined lower. can the barrel extension be bought individualy? Thanks. ago Costs about $40-50 to have the feed ramps reprofiled from what I can gather. Contents: 1 Diamond Burr (For Colt 2 Stage Ramps) 1 Cut Lube (For Diamond Burr) 1 Bullet Stone (For Reshaping . Go back to writing school. 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. Your previous content has been restored. Anodized red parts. We're a little past that point as I already own both the barrel and receiver, both of which cant easily be replaced or swapped for a decent price. 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 If a barrel comes with the feed ramps could I take them off? Do you have an AR barrel or feed ramp tip? The information provided here does not represent the views of Cheaper Than Dirt! Site towers are not "F" marked SPECS: Length- 14.5". AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. The best case is to have both an upper and barrel that have the feed ramps. - The Shooter's Log, 2012 SHOT Show Special Report: Del-Ton TRX Rifle and More! I guess it depends on what your relationship to the necessary shop activities is. I should have taken my own advice for once. I have seen it done many, MANY times and if done right, it works/functions 100% without issue. 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. 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? are all barrels w/ m4 feed 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. Ballistic Performance of Federal Punch .22 LR Ammunition with the Heritage Barkeep #1063. If I can correct an issue before it's an issue that is preferred. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. 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? M4 extension with .350 M4 style feed ramps 11 Degree Target Crown Threaded Muzzle 5/8"x24 TPI Weight: 26.5 ounces A couple of times I ended up with the OK set up from the picture above. Earlfillmore 13 hr. Dec 17, 2020. 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). All Rights Reserved. Home Firearms Figuring Out Feed Ramps. That's an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. 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. There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. 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. Should not be too hard. 1 is a standard and the other for use with m4 feed ramp barrels. 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. This USGI modification was done to both the barrel extension and the upper receiver, creating a longer and steeper feed ramp. again, Thanks. Edited April 27, 2014 by Mark Gale Is it kosher to add M4 feed ramps to a standard upper to match an m4 ramped barrel? Damaged Ak front end Barrel in Trunnion with or without sight bases. Questions on how to install your new BA barrel? Factory said its fine . The first reason is that they are, indeed, better. 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). 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. Would not feed to save its life! It has 2 ramps cut into the receiver to help the rounds feed into the chamber. I am having a tough time finding an in-stock barrel (18 or 20 incher) with a rifle extension on it. All this basically means is that the ramps continue from the barrel extension down through the upper receiver tonthe magazine. The Bullet ~ Handguns, Rifles and Shotguns, http://thearguys.com/ar-facts/m4-feed-ramps/. Thats why AR10s- And Scar heavies exist for. Guess what? Either way is good and both types work great with semi auto only guns. Barrels are Douglas 416 stainless steel with 1-7 twist with M4 feed ramps I found the article very informative. 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. The barrel is supposed to have the M4 feed ramps. http://www.ar15fornoobs.com/wp-content/uploads/feedramps.jpg. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. Everything that you have on your side to make any weapons more reliable and work when it absolutely needs to is a plus. Looking for a black stripped A1 upper with non m4 feed ramps (just realized the upper I have wont work with my barrel). In short, if you have a Dremmel you can do it yourself. This is a big tip, by the way, for pistol-caliber ARs. However the DD 14.5 are ideally meant to mate up with M4 style upper receiver feedramps. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. Whether they materialize or not depends on the direction of the mismatch. I picked up a side charging upper from Sundevil last year. Create an account to follow your favorite communities and start taking part in conversations. So, an M4 feed ramp includes the barrel extension and the upper. All uppers are assembled cleaned and tested before shipping. BUT if you find someone to grind your feed ramps and they do a good job, post it up and let us know. 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. The dimensions are different between the two, so theyd have to change some things to the feed ramps dimensions. Anything else you want to share about M4 clones would be appreciated, especially when it comes to a reliable rifle. In case My barrel is rifle ramp it won't be so bad after all. Display as a link instead, When you purchase through links on our site, we may earn an affiliate commission, which supports our community. This is one time it's better to go a little too far than to leave an edge for the . The M-16/M4 are great weapons. 50 bucks one way or the other on the barrel ain't squat! They are also 1/7 twist, 4150 steel, chrome lined, and button rifled like the real deal! This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. For instance I was looking at the BCM upper receiver, and it said it had M4 feed ramps machined into the upper. As suggested, its best to match the upper and barrel extension no worries that 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. However Ive built numerous ar15 and lr308 rifles and pistols. AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. what I fear the most is having an m4 ramp upper and then getting a barrel with a rifle ramp. #2. Instead, I just loaded up each mag with two rounds, and pushed the rounds forward by hand until the tip of . To measure just where the round makes impact on the feed ramps, I did not use any sort of micrometer to measure. I like getting another Upper idea then you could end up with two rifles! Costs about $40-50 to have the feed ramps reprofiled from what I can gather. 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. Machined from 4150 Chrome Moly Vanadium Steel and feature a QPQ corrosion resistant finish and QPQ coated M4 feed ramp extension. I put together a second AR9 that is having a feeding issue, even if using similar parts as the first one. Single Action and Double Action Which One Is Better For You? On AR9's, I understand the distance between the Mag Follower and the Feed Ramp is a known complication in the design. 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. Not all mil-spec features advertised on the product information are the real mil-specs. 2. You have the option of barrel type, thread, fluting, finish type and to add a match bolt. There is no way to make a carbine barrel extension out of a rifle barrel extension, period, full stop. practical_man In general, all you need to understand is that the M4 feed ramps include the barrel extension and upper receiver. Recommend using a gunsmith this route too if you are not comfortable. That puts the cartridge in a position where the extended feed ramp improves the breech-loading design. I'm planning on replacing my forearm with a Larue 13.5. Feeds flawlessly. What is an m4 feed ramp? I had seen these pix years ago and dismissed the idea of mix and match. I wouldn't be concerned at all with any wear after modifying an upper receiver. The barrel Throat is the second most critical component after angles and should be polished with utmost care. Don't ever put non M4 ramped barrel on a M4 ramped upper receiver. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. Barrel is medium SPR profiled barrel, threaded with a 1/2-28 thread for the AE brakes and collar. Create Account; Log Out ; Log In ; Wishlist 0; Shopping Cart 0; Home; About With the increased use of larger-diameter cased cartridges, the M4 feed ramps are proving their values when using them in those cartridges. You need to match up barrels to receivers for optimum performance. I recommend putting any AR-platform firearm together with a matched M4 barrel extension and upper receiver set, just because you can. They . They offer a lower, more extensive, and smoother entry for any round of ammo, whether its necessary or not. Upload or insert images from URL. Interesting reading. Looking For Bear Creek Arsenal Barrels Review? Press question mark to learn the rest of the keyboard shortcuts. When I function tested it the first time with live half-jacketed rounds I had the worst FTF jam I have ever experienced. I suggest you get a rifle receiver. 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. Thats true overall and good to keep in mind. A couple of times I ended up with the OK set up from the picture above. By I prefer them. 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. EDIT: Okay, I understand now! Here you can see an upper with "rifle" feedramps. The angle is going to be key, alot of people attempt to mimic the angle of the barrel feed ramps, this is incorrect. Some gun owners believe that the M4 ramps can help for some of the larger-diameter cartridges in use. Use this M4 Barrel extention with M4 feedramps. I'm lookin for a clear definition as to what they are, and what they do to enhance a given rifle's performance? I didnt think anything about it having M4 feed ramps. The only other time it seems to help is if the mag is feeding the rounds with the bullet slightly angled lower than normal. This Kit is made to cut or polish the STEEL Feed Ramps on your Barrel Extension ONLY. Press question mark to learn the rest of the keyboard shortcuts. The ramps are in the barrel extension. They were not intended to be super long range man killers. For new construction barrels only. All comments are held for moderation and will appear after approval. April 23, 2014 in Rifle - Technical. Both. 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. from my service in the 70s to my personal weapons, all of my ARs are early 1970 slab sided Colt SP1s. 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 didn't forsee that we'd ever see the day when replacement parts would be so hard to get. Avoid Polishing Too Lightly Or Too Roughly Gas block area is .750 diameter. Theres a bit more to it than just polishing. I've been thinking about doing sort of an "Early Diemaco C8 carbine" clone build with a C7 style upper receiver. I wont buy a barrel that isnt a wylde 223 556 but Im only now noticing. Proper maintenance and lubrication. You can post now and register later. 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. Some argue that, factually, its a step to enable a smoother feeding. The barrel extension and the receiver both have to have the cuts. Only took a few minutes.