Add 3% to the total cost for credit card purchases. Watch a video about our Modern Series AR barrel: Change the angle so that the ramp ends at the exact same point. 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. Snipers Hide is a community of Snipers of all kinds, focusing on long range shooting, accuracy, and ballistics. You also repeated yourself. Please allow 5~10 days for assembly and testing before ship date. It gives a longer ramp that is less steep into the chamber. You can post now and register later. can you buy feed ramps individually? 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). Hasn't misfed yet, through initial break in up through 1k rounds, and that's mag length ammo. M4 barrel to non M4 receiver is fine, but not the other way around. I have a 723 build (w/ C7 upper) and a 727 build (A2 upper) that use 14.5" Colt M4 barrels. 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? Not saying a really good gunsmith cant do it, just that theres a bit of an involved process. 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. I suggest you get a rifle receiver. 2. ago KrinkyDink2 9 hr. No feed ramps. Some barrels I see for sale say they include M4 feed ramps, and some uppers say they include them too. 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 Fora platform includes forum software by XenForo. That's an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. With the increased use of larger-diameter cased cartridges, the M4 feed ramps are proving their values when using them in those cartridges. Seems M4 is all the rage these days. 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. Any use of this content without express written consent is prohibited. Either way is good and both types work great with semi auto only guns. 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. Is one better than the other? Ready to drop onto a complete lower receiver. I can probably get the upper reciever first. M16's fed pretty well before the M4 feed ramps were introduced. Do you have an AR barrel or feed ramp tip? 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. 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. FFL Fax: 866-721-8691. Feels like a silly question now that it makes sense. All Rights Reserved. So, lets glide down these lines below to erase your misconceptions about them. Is getting it as part of the upper better? 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 The Mission of Cheaper Than Dirt! No need to alter the upper. 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. Bullets tend to bump, snag, and stub on these guns. I built the upper using a Mega upper with a Compass Lake 18" barrel. 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. Get The Best Trigger Pull Gauges To Make Every Shot Count. "A Bad Day At The Range Is Better Than A Great Day Working". Then you can get a regular rifle barrel for the upper with no ramps. If you ever have an issue, then look at getting a correct barrel for the upper. Don't ever put non M4 ramped barrel on a M4 ramped upper receiver. hey bro nice to see you here!!! April 23, 2014 in Rifle - Technical. Semi autos run slower than full autos. I should have taken my own advice for once. This Kit is made to cut or polish the STEEL Feed Ramps on your Barrel Extension ONLY. 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. I'm assuming that you only need the ramps from one or the other. May 17, 2008 in The Armorer. Thats receivers, bolts, and on down the list of the 100 or so parts that can make up an AR-15. Required fields are marked *. JavaScript is disabled. 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. 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. 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. How long your barrel "lasts" depends on what your accuracy threshold is before you decide it is too bad to keep using. Try this little exercise: 1. To measure just where the round makes impact on the feed ramps, I did not use any sort of micrometer to measure. Which Model Colt 1911 is For Me? 410 stainless is also harder and more corrosion resistant than conventional 416 stainless found in other commercially available precision barrels. I too built a .458 SOCOM carbine . This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. this is the barrel designed and profiled for the Mark 12 Mod 0 uppers and rifles. For someone who is new at trying to understand feed ramps it helps to read a couple different explanations. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Owning Best Ruger SR9c Accessories Can Change Your Life. 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 They are also 1/7 twist, 4150 steel, chrome lined, and button rifled like the real deal! If it's happening regularly, check the magazines you are using for serviceability. So, an M4 feed ramp includes the barrel extension and the upper. 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. 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. 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 When you need to nail something you use a hammer not a wrench. Description Genuine 14.5" SOCOM, carbine length gas system barrel from Colt. 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? I've been thinking about doing sort of an "Early Diemaco C8 carbine" clone build with a C7 style upper receiver. A forum community dedicated to drag racing drivers and enthusiasts. They . One new winner* is announced every week! 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. If you have a bolt that you would like to use you are welcome to ship it to us for accurate headspace. If you aren't 110% comfortable with doing the job, and you do not have all the tools and equipment to do it properly, then have a smith do it for you. 5. I recommend putting any AR-platform firearm together with a matched M4 barrel extension and upper receiver set, just because you can. It has 2 ramps cut into the receiver to help the rounds feed into the chamber. pm me at BOG or PG, or get in touch with my number 09177542777 if you're interested. 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. so im thinking I might as well just get the unramp upper. A closer look at uppers and barrel extensions. 308 m5 using m4 feed ramps, which I belive are for the smaller round like. Theres a bit more to it than just polishing. Good call. . You must log in or register to reply here. Man, its crazy how many of yall have absolutely no idea why you do what you do. http://www.ar15fornoobs.com/wp-content/uploads/feedramps.jpg. But, as with anything else, this work can go too far. Full M4 feed ramps start on the upper and continue onto the barrel extension. Interesting reading. Id just get one for that barrel and find a barrel with m4 extension for the upper you already have. 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? Feed ramps being m4 or. All uppers are assembled cleaned and tested before shipping. 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. I've seen several places say you just need a 1/8" chainsaw sharpening bit and a Dremel to fix it. All Rights Reserved. I like getting another Upper idea then you could end up with two rifles! Anodized red parts. 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. I think your mistaking that with adding ramps to the receiver. Oh well, as I tell my lovely and understanding bride, guns are relatively free. it's the ammo and training that cost real money. 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. 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. Your email address will not be published. Create an account to follow your favorite communities and start taking part in conversations. Costs about $40-50 to have the feed ramps reprofiled from what I can gather. A4 Complete Upper Receiver - 7075 Forged A4 Flat Top Upper Receiver - M4 Feed Ramps Includes: - Add to Cart. What's the difference? All things being equal and having used both weapons extensively, Id rather have the feed Ramps. Single Action and Double Action Which One Is Better For You? Installing a Luth-AR Rifle Buffer Tube and an A2 Stock #1041. 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. Proper maintenance and lubrication. 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. This space is for pictures of "retro" Stoner rifles and completed or partial retro AR-15 builds, as well as discussions about either. 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. Some suggest taking a grinder to the extension area. They are better! There's a 7 degree difference between standard and M4 ramps. Forged 7075-T6 aluminum is harder than a bulls balls. For new construction barrels only. Ar-15 Manufacturers Should Be Avoided: Which Should You Buy? When I function tested it the first time with live half-jacketed rounds I had the worst FTF jam I have ever experienced. Well, over the course of 5,000 rounds at .40 a round, you spent two grand on ammo. Just because you can, doesn't mean you should. 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. The information provided here does not represent the views of Cheaper Than Dirt! . So, what is the difference between M4 feed ramps and regular ones? Its not a big deal but still an important thing to remember and understand. Married pretty well with my Seekins machined lower. Feedramps, proper staking of castle nuts, forward assist (yep went there)S-happens seen it. True, which is why they're not even needed in semi autos. I cant advise on that one folks. Factory said its fine . Is it kosher to add M4 feed ramps to a standard upper to match an m4 ramped barrel? 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. Barrel, sight and trigger work on most pistols and shotguns. Both. Press question mark to learn the rest of the keyboard shortcuts. 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. I would only add the feed ramps to the receiver if I had feeding issues, which you should not have. Earlfillmore 13 hr. 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. 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.) . After two months of back and forth, cleaned up the feed ramps. The first reason is that they are, indeed, better. You need to match up barrels to receivers for optimum performance. Machined from 4150 Chrome Moly Vanadium Steel and feature a QPQ corrosion resistant finish and QPQ coated M4 feed ramp extension. The Bullet ~ Handguns, Rifles and Shotguns, http://thearguys.com/ar-facts/m4-feed-ramps/. Feed ramps on barrel extensions are a good example. aaargh.. that's the setup I hate to see. 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-. Don't forget read more information about it here! 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. 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. This can lead to a rare but odd situation; barrel and receiver mismatch. 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. 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. I bought a .458 upper to go with it, with the extra internal clearance cut before anodizing. 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). Press question mark to learn the rest of the keyboard shortcuts. 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. 3. Everything that you have on your side to make any weapons more reliable and work when it absolutely needs to is a plus. 4. Load a magazine with two or three rounds, lock the bolt group back on your rifle or carbine and insert the magazine. The difference between standard feed ramps and M4 ramps is easy to see. Your discussions, feedback and comments are welcome here as long as they are relevant and insightful. BrianEnos.com Copyright 1996-2023 AR15.COM LLC. 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. Notice how the ramp starts on the barrel extension and not in the receiver. I have looked and looked and looked. This gave it a longer point for the magazine to allow the rounds to come out of the magazine and feed into the chamber. Go back to writing school. can the barrel extension be bought individualy? M4 ramps help in feeding in for carbine in full auto. If I have a rifle ramp upper and get the barrel later and coincidentally will have an m4 ramp. 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. Copyright 1996-2023 AR15.COM LLC. If you consider this article useful, share it with anyone in need! Anything else you want to share about M4 clones would be appreciated, especially when it comes to a reliable rifle. This USGI modification was done to both the barrel extension and the upper receiver, creating a longer and steeper feed ramp. 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. Caught a deal on a matched barrel and bolt. 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! Related: If you are using a Ar rifle, best green laser sight is good choice for hunting. If this is your first visit, be sure to 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 16" Pre-Ban M4 Profile Barrel Assembly CARBINE Gas System About Upper assembly comes completely head spaced and test fired. Should not be too hard. Create an account to follow your favorite communities and start taking part in conversations. Press J to jump to the feed. Metal cases ammunition such as Wolf through an M4 clone? The parts are interchangeable. 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.