Insert the barrel and sharpie the cut area, then use the right bit on a dremel. 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. Its not a big deal but still an important thing to remember and understand. M4 barrel to non M4 receiver is fine, but not the other way around. can you buy feed ramps individually? Just put it in and shoot it. For use by barrel manufacturers. 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. You can post now and register later. Proper maintenance and lubrication. 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. Your email address will not be published. Single Action and Double Action Which One Is Better For You? May 17, 2008 in The Armorer. Just because you can, doesn't mean you should. Thread: Adding M4 feedramps to A1/C7 upper. Create an account to follow your favorite communities and start taking part in conversations. Is it kosher to add M4 feed ramps to a standard upper to match an m4 ramped barrel? Your previous content has been restored. In short, if you have a Dremmel you can do it yourself. Costs about $40-50 to have the feed ramps reprofiled from what I can gather. Good call. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. BUT, I DO NOT TRUST MY LIFE TO THAT WEAPON. 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. Finding the proper upper receiver is your best option. I've modified barrel/receivers even before M4 cuts came out and done some receivers when the barrels had cuts. 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 (they're lowered). The Fora platform includes forum software by XenForo. 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. Here you can see an upper with "rifle" feedramps. You need to match up barrels to receivers for optimum performance. Buy AR 15 16" .350 Legend Nitride M4 Profile Barrel 1:16: GunBroker is the largest seller of AR15 Parts Gun Parts All: 974000728 . I just need a little guidance on this and I'm having trouble getting good results from Google. Watch a video about our Modern Series AR barrel: One new winner* is announced every week! No need to alter the upper. Your link has been automatically embedded. If a barrel comes with the feed ramps could I take them off? I recently built an AR9 (Glock Mags) that has been running flawlessly for about 3-400rds. Higher pressure equte to parts (bcg, buffer, buffer spring, ROUNDS, etc) experiencing much higher wear/tear. Would not feed to save its life! AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. 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. Some argue that, factually, its a step to enable a smoother feeding. Some suggest taking a grinder to the extension area. Either way is good and both types work great with semi auto only guns. 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. 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? 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. Full M4 feed ramps start on the upper and continue onto the barrel extension. 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 "C" stamp and CAGE code available. 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. I can assure you that most mods that deviate from the original design aren't 100% reliable. Seems M4 is all the rage these days. 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. What is the difference between Modern, Performance, and Premium Series Barrels? This USGI modification was done to both the barrel extension and the upper receiver, creating a longer and steeper feed ramp. DSA has fat top, Mueller, non feed ramp uppers for $40. For the purposes of this chapter, we'll call the new one the M4, and the old one the AR. M16s and M16-A1s run at 750 rounds per minute in full auto. ago KrinkyDink2 9 hr. This can lead to a rare but odd situation; barrel and receiver mismatch. The rifle-platform M16s dont use them. The parts are interchangeable. #2. The tip of the cartridge rarely comes into contact with the upper receiver. so im thinking I might as well just get the unramp upper. Please allow 5~10 days for assembly and testing before ship date. Description Genuine 14.5" SOCOM, carbine length gas system barrel from Colt. 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. Add 3% to the total cost for credit card purchases. I have seen it done many, MANY times and if done right, it works/functions 100% without issue. Experts advise on 31 degrees+30 minus-zip. You also repeated yourself. For a better experience, please enable JavaScript in your browser before proceeding. Guess what? I've seen several places say you just need a 1/8" chainsaw sharpening bit and a Dremel to fix it. Is getting it as part of the upper better? Little polish. I wouldn't be concerned at all with any wear after modifying an upper receiver. 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. Don't forget read more information about it here! I would only add the feed ramps to the receiver if I had feeding issues, which you should not have. 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. Everything that you have on your side to make any weapons more reliable and work when it absolutely needs to is a plus. I got my help from this thread, and thank you again to ORD. Full M4 feed ramps are on both the upper and barrel extension. Looking for a black stripped A1 upper with non m4 feed ramps (just realized the upper I have wont work with my barrel). I am having a tough time finding an in-stock barrel (18 or 20 incher) with a rifle extension on it. Thats true overall and good to keep in mind. Site towers are not "F" marked SPECS: Length- 14.5". 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). It was in the last few issues of SAR. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. You cannot paste images directly. Which Model Colt 1911 is For Me? It gives a longer ramp that is less steep into the chamber. 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. Semi autos run slower than full autos. Other selections are available for upper, bolt and carrier, charging handle, handguards, flash hiders, and gas blocks. FN AR-15 5.56X45mm Nato . 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 Our 6mm ARC barrel come standard with 1-7.5 Twist, M4 Feed Ramps and gas tube. AAC and anybody else that has any reasonable expectation of quality and reliability use an M4 feed ramp. Ready to drop onto a complete lower receiver. M4 feed ramps. Those ramps line up with the barrel, which are cut deeper than on a rifle barrel. I recommend putting any AR-platform firearm together with a matched M4 barrel extension and upper receiver set, just because you can. 30 cal. Gun smith said , not head spaced properly. The difference between standard feed ramps and M4 ramps is easy to see. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. If I have a rifle ramp upper and get the barrel later and coincidentally will have an m4 ramp. Oh well, as I tell my lovely and understanding bride, guns are relatively free. it's the ammo and training that cost real money. 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. I've seen that pic, it is a good reference. colt A1E1 733 uppers didn't have extended carbine feedramps ? 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. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. I'm a machinist in the aerospace industry and lucky enough to have. This has been my concern with modifying the aluminum parts. Create Account; Log Out ; Log In ; Wishlist 0; Shopping Cart 0; Home; About 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. Either way is good and both types work great with semi auto only guns. Paste as plain text instead, Use this M4 Barrel extention with M4 feedramps. There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. 's blog. i have the rifle barrel. A couple of times I ended up with the OK set up from the picture above. Home Firearms Figuring Out Feed Ramps. M4 Feed ramps on barrel extensions are a solid example. are all barrels w/ m4 feed ramps?? Hasn't misfed yet, through initial break in up through 1k rounds, and that's mag length ammo. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Owning Best Ruger SR9c Accessories Can Change Your Life. Try this little exercise: 1. Barrel, sight and trigger work on most pistols and shotguns. what I fear the most is having an m4 ramp upper and then getting a barrel with a rifle ramp. this is the barrel designed and profiled for the Mark 12 Mod 0 uppers and rifles. All this basically means is that the ramps continue from the barrel extension down through the upper receiver tonthe magazine. I use it for hunting dogs only. 3. I cant advise on that one folks. 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. A forum community dedicated to drag racing drivers and enthusiasts. There is a picture of the various options, hopefully another poster can link them. I'll probably build a pistol out of this one. Anything else you want to share about M4 clones would be appreciated, especially when it comes to a reliable rifle. M4 ramps help in feeding in for carbine in full auto. To conclude, the M4 feed ramps bring a lot of improvements to the AR-platform firearms. The barrel Throat is the second most critical component after angles and should be polished with utmost care. All we do is dremmel it to match - we dont remove it and grind to any specific angle. These Mil-Spec M4 feed ramps are part of the original CNC manufacturing process. I don't have much to add re: feed ramps, but. I have looked and looked and looked. Issues can arise when receivers and barrel extensions are mismatched. Does anyone have a follow up that confirms or denies my claim? Seems like it should work to me, but be a real challenge to keep clean and be damned ugly to boot. To measure just where the round makes impact on the feed ramps, I did not use any sort of micrometer to measure. A4 Complete Upper Receiver. However Ive built numerous ar15 and lr308 rifles and pistols. If you don't clean it but demand 3/4MOA you might get 1,500. I prefer them. You have the option of barrel type, thread, fluting, finish type and to add a match bolt. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. Sorta. I like getting another Upper idea then you could end up with two rifles! So I'm working on my first build, and I'm a little confused. Instead, I just loaded up each mag with two rounds, and pushed the rounds forward by hand until the tip of . - 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. You will be able to leave a comment after signing in, AR15Armory.com However, its rare now to find an upper receiver or a ready-to-go barrel that doesnt have the M4 cuts. Thats an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. The ramps on the regular rifle-type extension are cut just to the edge of the extension. As a result, the factory machined M4 feed ramps on the receiver are hard coat anodized which adds significant strength to the aluminum. They were not intended to be super long range man killers. This is a big tip, by the way, for pistol-caliber ARs. Press question mark to learn the rest of the keyboard shortcuts. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. The photo shows the dents and the bolt lugs line up perfectly. 308 m5 using m4 feed ramps, which I belive are for the smaller round like. 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 . 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. While I've got everything apart, I'm thinking I just want to put an M4 barrel extension on. Get The Best Trigger Pull Gauges To Make Every Shot Count. I will attest that a rifle upper and a barrel with the M4 feedramps works just fine. And that the M4s and M4A1s are issued M855 which has a slight difference in bullet shape vs. the older 55gr M193 BALL. which is bad combo. The barrel extension and the receiver both have to have the cuts. 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). The ramps are in the barrel extension. Then you can get a regular rifle barrel for the upper with no ramps. 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). If your mag catch is at Spec height, you should not have a problem with an M4 cut barrel in a rifle receiver. M4 Barrel Extension (M4 Feedramps) $22.95 (4 reviews) SKU: Barrel-Extension-M4 Stock Status: Quantity: Add to Wish List Description For your AR15, M16, M4. 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. As suggested, its best to match the upper and barrel extension no worries that way. A closer look at uppers and barrel extensions. You can always buy a non-m4 extension and have the new barrel retimed and headspaced, but it will probably cost more than a new upper receiver. A feed ramp is a basic feature of many breech loading cartridge firearm designs. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. Upload or insert images from URL. No feed ramps. April 23, 2014 in Rifle - Technical. Bullets tend to bump, snag, and stub on these guns. The A2's are pretty reliable guns, but trashed mags can cause them to have malfunctions also. 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. 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. Interesting reading. http://www.ar15fornoobs.com/wp-content/uploads/feedramps.jpg. Installing a Luth-AR Rifle Buffer Tube and an A2 Stock #1041. if you are OK with 3MOA, you might go 20,000 rounds! 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. $101.95. The extension is the part at the end of the barrel that fits inside the upper. Man, its crazy how many of yall have absolutely no idea why you do what you do. 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 an extra brand new M4 barrel extension ramp to replace a rifle ramp. Jams and misfires. Absolutely nothing to do with casing diameter, or whatever other weird sht you guys imagine. Product Details Douglas 18" Flat Dark Earth Cerakoted 416 stainless steel barrel with 1-7 twist and M4 feed ramps. By the time you made it work you spent more time, money, and effort than if you just bought a new barrel or upper. I guess it depends on what your relationship to the necessary shop activities is. Rear side of a CZ-75B pistol barrel showing the (here dirty) feed ramp. Copyright 1996-2023 AR15.COM LLC. The last is using the best and right ammo for the job. I too built a .458 SOCOM carbine . All things being equal and having used both weapons extensively, Id rather have the feed Ramps. 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. 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 you have an account, sign in now to post with your account. If I can correct an issue before it's an issue that is preferred. In general, all you need to understand is that the M4 feed ramps include the barrel extension and upper receiver. Does it make a big difference? For someone who is new at trying to understand feed ramps it helps to read a couple different explanations. If this is your first visit, be sure to The dimensions are different between the two, so theyd have to change some things to the feed ramps dimensions. This 20" BCM barrel is machined from SS410 stainless steel. *Must have a registered ARFCOM account to win. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. We reserve the right to edit as appropriate, delete profane, harassing, abusive and spam comments or posts, and block repeat offenders. All uppers are assembled cleaned and tested before shipping. and add them to non-m4 barrels.? "It will last 5k rounds instead of 4k. Edited April 27, 2014 by Mark Gale 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. -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! instead of mil-spec. 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. I've seen uppers with and without anodizing on M4 ramps . it seems to me to be about 50/50 with and without. Feed ramps being m4 or. So, lets glide down these lines below to erase your misconceptions about them. For instance I was looking at the BCM upper receiver, and it said it had M4 feed ramps machined into the upper. You have a rifle barrel. upper recievers and barrels are hard to comeby. Then the manufacturer discontinued the barrel. 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. I bought a .458 upper to go with it, with the extra internal clearance cut before anodizing. The Mission of Cheaper Than Dirt! Some gun owners believe that the M4 ramps can help for some of the larger-diameter cartridges in use. Avoid Polishing Too Lightly Or Too Roughly 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. 410 stainless is also harder and more corrosion resistant than conventional 416 stainless found in other commercially available precision barrels. A4 Complete Upper Receiver - 7075 Forged A4 Flat Top Upper Receiver - M4 Feed Ramps Includes: - Add to Cart. . For new construction barrels only. Shorter length equates to much higher pressure in the upper receiver. Related: If you are using a Ar rifle, best green laser sight is good choice for hunting. what does it do?? 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. Questions on how to install your new BA barrel? Only took a few minutes. Required fields are marked *. I wont buy a barrel that isnt a wylde 223 556 but Im only now noticing. Sent back again. 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. I've been thinking about doing sort of an "Early Diemaco C8 carbine" clone build with a C7 style upper receiver. Clear editor. Notify me of follow-up comments by email. Description. 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 So, an M4 feed ramp includes the barrel extension and the upper. With the increased use of larger-diameter cased cartridges, the M4 feed ramps are proving their values when using them in those cartridges. 4. Barrel is medium SPR profiled barrel, threaded with a 1/2-28 thread for the AE brakes and collar. I checked what I have now. . The barrel is supposed to have the M4 feed ramps. 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. Lol. 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. He had more to say and added some more engineer and gun designer speak too. Im an old vet, now retired and looking to build some ARs as a hobby to keep me doing something that I will enjoy. Your discussions, feedback and comments are welcome here as long as they are relevant and insightful. Id just get one for that barrel and find a barrel with m4 extension for the upper you already have. When I function tested it the first time with live half-jacketed rounds I had the worst FTF jam I have ever experienced. Go back to writing school. 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. The closest brand new barrel you are likely to find is the Windham Weaponry 20 inch 1/7 twist chrome lined barrel. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. I didn't forsee that we'd ever see the day when replacement parts would be so hard to get.
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