I will attest that a rifle upper and a barrel with the M4 feedramps works just fine. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. 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. M4 ramps help in feeding in for carbine in full auto. If your mag catch is at Spec height, you should not have a problem with an M4 cut barrel in a rifle receiver. Gas block area is .750 diameter. Editors Note: This article was originally published in January of 2019. In this episode of Gun Stock Reviews, we look at the difference between M4 Ramps and the old standard ramps of the past. I cant advise on that one folks. They . However, its rare now to find an upper receiver or a ready-to-go barrel that doesnt have the M4 cuts. They are better! Polishing the edges of the chamber mouth to remove the edges of that chamfer will. I'd rather not spent the money to get it cut to the specific length I need, FSB installed, etc just to have it immediately not work and have to sort out then or start from square one with a new barrel. BUT, I DO NOT TRUST MY LIFE TO THAT WEAPON. I read in Bravo company that there are 2 kinds of flat top upper. There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. Earlfillmore 13 hr. If your magazines are set up correctly, and the feed lip edges polished smooth, each round fed from the magazine will go directly into the chamber. Powered by Invision Community. Olympic Arms Upper receiver with rear sight assembly and forward assist and dust cover has M4 feed ramps $260 View attachment 1016575 View attachment 1016576 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). 2. 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 Some suggest taking a grinder to the extension area. I replaced the M4 feed ramp barrel with a monolithic feed ramp barrel and no more problems. So I'm working on my first build, and I'm a little confused. The last is using the best and right ammo for the job. Edited April 27, 2014 by Mark Gale 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. One new winner* is announced every week! From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. That is what I tell people when they try to convince me that they need a stainless barrel instead of chrome-moly. Powered by Invision Community, M4-style barrel extension with Rifle-type upper. Your previous content has been restored. 2. Thats an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. Clear editor. 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. Will my A3 upper reciever work with my M4 barrel extention.According to some or your posts they will.Thanks Bill. Questions on how to install your new BA barrel? The barrels also had to be modified. I found the article very informative. Load a magazine with two or three rounds, lock the bolt group back on your rifle or carbine and insert the magazine. Description Genuine 14.5" SOCOM, carbine length gas system barrel from Colt. I can probably get the upper reciever first. The good idea is that the round, presented at a lower plane, will contact other lower feed ramps and go right on in. 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. Feeds flawlessly. -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! If you don't clean it but demand 3/4MOA you might get 1,500. 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. AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. It gives a longer ramp that is less steep into the chamber. Ideally both. ago Costs about $40-50 to have the feed ramps reprofiled from what I can gather. Not saying a really good gunsmith cant do it, just that theres a bit of an involved process. Feedramps, proper staking of castle nuts, forward assist (yep went there)S-happens seen it. I've been thinking about doing sort of an "Early Diemaco C8 carbine" clone build with a C7 style upper receiver. 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. Proper maintenance and lubrication. I don't have much to add re: feed ramps, but. Everything that you have on your side to make any weapons more reliable and work when it absolutely needs to is a plus. However the DD 14.5 are ideally meant to mate up with M4 style upper receiver feedramps. The tip of the cartridge rarely comes into contact with the upper receiver. *Must have a registered ARFCOM account to win. The upper is designed to have two levels of top rails for mounting of night vision in front of scopes. A couple of times I ended up with the OK set up from the picture above. It has ran flawlessly (barring tuning of the gasblock when new) with several different brands of magazines and ammo. The M4 ramps, if I am not mistaken, were originally made to help reduce malfunctions on the M4 carbine. Factory said its fine . 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. 4. You have the option of barrel type, thread, fluting, finish type and to add a match bolt. It has 2 ramps cut into the receiver to help the rounds feed into the chamber. To conclude, the M4 feed ramps bring a lot of improvements to the AR-platform firearms. Should not be too hard. Absolutely nothing to do with casing diameter, or whatever other weird sht you guys imagine. I have a non ramped barrel in a ramped upper, feeds fine. 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 . Thats receivers, bolts, and on down the list of the 100 or so parts that can make up an AR-15. upper recievers and barrels are hard to comeby. I would only add the feed ramps to the receiver if I had feeding issues, which you should not have. I had seen these pix years ago and dismissed the idea of mix and match. Mil-spec is good for the masses, and if you want the job done it is a great start. A couple of times I ended up with the OK set up from the picture above. 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! You cannot paste images directly. In short, if you have a Dremmel you can do it yourself. So, what is the difference between M4 feed ramps and regular ones? Press J to jump to the feed. Required fields are marked *. You must log in or register to reply here. Finding the proper upper receiver is your best option. It may not display this or other websites correctly. Read Now. BUT if you find someone to grind your feed ramps and they do a good job, post it up and let us know. Ar-15 Manufacturers Should Be Avoided: Which Should You Buy? The mil actually only specs M4 feed ramps for use in its M4s. It's an interesting question. With the increased use of larger-diameter cased cartridges, the M4 feed ramps are proving their values when using them in those cartridges. Costs about $40-50 to have the feed ramps reprofiled from what I can gather. Hasn't misfed yet, through initial break in up through 1k rounds, and that's mag length ammo. Your link has been automatically embedded. I suggest you get a rifle receiver. They offer a lower, more extensive, and smoother entry for any round of ammo, whether its necessary or not. which is bad combo. There is no way to make a carbine barrel extension out of a rifle barrel extension, period, full stop. Recommend using a gunsmith this route too if you are not comfortable. 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. You need to match up barrels to receivers for optimum performance. 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 . 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. They guide the bullet up and into the chamber. The best case is to have both an upper and barrel that have the feed ramps. We have four combinations here: Also, barrel life is relative. 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. i have an extra brand new M4 barrel extension ramp to replace a rifle ramp. i have the rifle barrel. Either way is good and both types work great with semi auto only guns. LanceRiley, Only took a few minutes. Share it in the comments section. 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? This space is for pictures of "retro" Stoner rifles and completed or partial retro AR-15 builds, as well as discussions about either. A forum community dedicated to drag racing drivers and enthusiasts. If you ever have an issue, then look at getting a correct barrel for the upper. Machined from 4150 Chrome Moly Vanadium Steel and feature a QPQ corrosion resistant finish and QPQ coated M4 feed ramp extension. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. The M4 receiver feed ramps are cut at a steeper angle and, as a result, extend down into the receiver wall. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. I have seen it done many, MANY times and if done right, it works/functions 100% without issue. Rear side of a CZ-75B pistol barrel showing the (here dirty) feed ramp. [ARCHIVED THREAD] - M4 feed ramp barrel in a non M4 ramp upper. M4 feed ramps. Single Action and Double Action Which One Is Better For You? By the time you made it work you spent more time, money, and effort than if you just bought a new barrel or upper. AAC and anybody else that has any reasonable expectation of quality and reliability use an M4 feed ramp. I just need a little guidance on this and I'm having trouble getting good results from Google. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Owning Best Ruger SR9c Accessories Can Change Your Life. The M4, and the CAR-15, before it have had similar problems like the ones you mentioned. A closer look at uppers and barrel extensions. If you have an account, sign in now to post with your account. 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. So I called. In most cases the ramps only help during full auto mode while cycling at a high rate. No need to alter the upper. You also repeated yourself. Semi autos run slower than full autos. AR9 - Help diagnosing feeding issue. Snipers Hide is a community of Snipers of all kinds, focusing on long range shooting, accuracy, and ballistics. 338 and others not the .308 76251 or 6.5 creedmore which o think should have a.30cal feed ramp.? I have looked and looked and looked. I will check with compass lake. JavaScript is disabled. Copyright 1996-2023 AR15.COM LLC. . If you have a bolt that you would like to use you are welcome to ship it to us for accurate headspace. I'll probably build a pistol out of this one. You have a rifle barrel. Rifles, Uppers, Lowers, Barrels, and more, [ARCHIVED THREAD] - Rifle vs m4 feed ramps, http://i135.photobucket.com/albums/q125/PursuitSS/Postings%20photos/c0d26170b75c3e6f9ea65a7d0862247e.jpg. 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. So, an M4 feed ramp includes the barrel extension and the upper. The dimensions are different between the two, so theyd have to change some things to the feed ramps dimensions. Feels like a silly question now that it makes sense. Create Account; Log Out ; Log In ; Wishlist 0; Shopping Cart 0; Home; About I prefer them. For a better experience, please enable JavaScript in your browser before proceeding. 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-. M16s and M16-A1s run at 750 rounds per minute in full auto. aaargh.. that's the setup I hate to see. The M-16/M4 are great weapons. 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. 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. 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. While I've got everything apart, I'm thinking I just want to put an M4 barrel extension on. The Bullet ~ Handguns, Rifles and Shotguns, http://thearguys.com/ar-facts/m4-feed-ramps/. 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. Theres a bit more to it than just polishing. Press question mark to learn the rest of the keyboard shortcuts. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. Anodized red parts. 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. After two months of back and forth, cleaned up the feed ramps. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. How long your barrel "lasts" depends on what your accuracy threshold is before you decide it is too bad to keep using. if you are OK with 3MOA, you might go 20,000 rounds! 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. Forged 7075-T6 aluminum is harder than a bulls balls. 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. M4 extension with .350 M4 style feed ramps 11 Degree Target Crown Threaded Muzzle 5/8"x24 TPI Weight: 26.5 ounces Is it worth the extra 50 bucks?" Ballistic Performance of Federal Punch .22 LR Ammunition with the Heritage Barkeep #1063. As they are becoming more and more a standard, and certainly do not do any harm to us. The information provided here does not represent the views of Cheaper Than Dirt! It is milled out of 6061 T6. 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. AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. Higher pressure equte to parts (bcg, buffer, buffer spring, ROUNDS, etc) experiencing much higher wear/tear. Jams and misfires. Upload or insert images from URL. Create an account to follow your favorite communities and start taking part in conversations. pictures would help. Any use of this content without express written consent is prohibited. Press J to jump to the feed. M16's fed pretty well before the M4 feed ramps were introduced. The barrel blanks available are made from 416 Stainless Steel. 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. When you need to nail something you use a hammer not a wrench. There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. Experts advise on 31 degrees+30 minus-zip. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. 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. Does it make a big difference? Here you can see an upper with "rifle" feedramps. Bullets tend to bump, snag, and stub on these guns. I put together a second AR9 that is having a feeding issue, even if using similar parts as the first one. Most work performed while-you-wait, evening and saturday appointments available. By Yamil Sued August 6, 2021. Featuring hand lapped 1/8 twist rate button rifling and M4 feed ramps barrel extensions, the 410 stainless barrel gives the shooter the best balance of weight and accuracy. I'd rather just pay the gunsmith to make it work than hunt down another barrel/upper if possible. All comments are held for moderation and will appear after approval. Remember less is more, little by little. Don't forget read more information about it here! http://www.ar15fornoobs.com/wp-content/uploads/feedramps.jpg. 30 cal. so im thinking I might as well just get the unramp upper. Looking For Bear Creek Arsenal Barrels Review? Brevity matters. Feed ramps on barrel extensions are a good example. 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. 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. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. For someone who is new at trying to understand feed ramps it helps to read a couple different explanations. Its highly recommended to put any AR-platform firearm together with a matching M4 barrel extension and upper receiver set. 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. You can post now and register later. The M4 was the first (allegedy) carbine length gas system. 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. practical_man Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? 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'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. It's best to have M4 ramps on both the upper and barrel. For new construction barrels only. 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.) . Display as a link instead, - 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. 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. 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. Some argue that, factually, its a step to enable a smoother feeding. 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). Your email address will not be published. Other selections are available for upper, bolt and carrier, charging handle, handguards, flash hiders, and gas blocks. I wont buy a barrel that isnt a wylde 223 556 but Im only now noticing. If your upper isn't showing signs of bullets rubbing on the aluminum under the barrel extension, you should be good with M4 ramps. I got my help from this thread, and thank you again to ORD. 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. Check often for fit. 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. are all barrels w/ m4 feed ramps?? All uppers are assembled cleaned and tested before shipping. May 17, 2008 in The Armorer. For a better experience, please enable JavaScript in your browser before proceeding. So there's a lot more going on with rounds bouncing up and down in the mags etc. Either way is good and both types work great with semi auto only guns. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. 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. 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. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. I recommend putting any AR-platform firearm together with a matched M4 barrel extension and upper receiver set, just because you can. Paste as plain text instead, 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 I recently built an AR9 (Glock Mags) that has been running flawlessly for about 3-400rds. 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. Copyright 1996-2023 AR15.COM LLC. Watch a video about our Modern Series AR barrel: Im an old vet, now retired and looking to build some ARs as a hobby to keep me doing something that I will enjoy.