Share it in the comments section. Its easier to add feed ramps to the receiver not so easy to add them to the barrel extension. I can still use the combination. M4 16", SBN, 1:7, 5.56 NATO Barrel Specifications: - Caliber: 5.56 NATO (.223 REM) - Gas Tube: Car Add to Cart. 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 is the barrel designed and profiled for the Mark 12 Mod 0 uppers and rifles. M4 barrel to non M4 receiver is fine, but not the other way around. Other selections are available for upper, bolt and carrier, charging handle, handguards, flash hiders, and gas blocks. A forum community dedicated to drag racing drivers and enthusiasts. Do you have an AR barrel or feed ramp tip? 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. is the m4 feedramp common in barrel extensions? From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. Product Description Surplus Colt 14.5" SOCOM, carbine length gas system barrel from Colt. For a better experience, please enable JavaScript in your browser before proceeding. To measure just where the round makes impact on the feed ramps, I did not use any sort of micrometer to measure. I just need a little guidance on this and I'm having trouble getting good results from Google. Thats why AR10s- And Scar heavies exist for. One new winner* is announced every week! Avoid Polishing Too Lightly Or Too Roughly 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. Most work performed while-you-wait, evening and saturday appointments available. I've been thinking about doing sort of an "Early Diemaco C8 carbine" clone build with a C7 style upper receiver. Thats receivers, bolts, and on down the list of the 100 or so parts that can make up an AR-15. 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. So the engineers lowered the feed rampa into the receiver. My factory JP CTR-02 has the appearance of the bottom right picture in the post above, M4 barrel extension in a rifle receiver, and there is not a mark on the aluminum under the barrel extension. When I function tested it the first time with live half-jacketed rounds I had the worst FTF jam I have ever experienced. so im thinking I might as well just get the unramp upper. If you ever have an issue, then look at getting a correct barrel for the upper. I have seen it done many, MANY times and if done right, it works/functions 100% without issue. Feedramps, proper staking of castle nuts, forward assist (yep went there)S-happens seen it. 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. 5. How long your barrel "lasts" depends on what your accuracy threshold is before you decide it is too bad to keep using. They offer a lower, more extensive, and smoother entry for any round of ammo, whether its necessary or not. Its a miracle! If your mag catch is at Spec height, you should not have a problem with an M4 cut barrel in a rifle receiver. Machined from 4150 Chrome Moly Vanadium Steel and feature a QPQ corrosion resistant finish and QPQ coated M4 feed ramp extension. 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. Barrel customizations are also available. I will check with compass lake. By Paste as plain text instead, To conclude, the M4 feed ramps bring a lot of improvements to the AR-platform firearms. The dimensions are different between the two, so theyd have to change some things to the feed ramps dimensions. By Which Model Colt 1911 is For Me? 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. No need to alter the upper. Is getting it as part of the upper better? Home Firearms Figuring Out Feed Ramps. Create an account to follow your favorite communities and start taking part in conversations. Looking to spend $180-250 (depending on condition, forge mark and if a rear sight is included or not.) Barrels are Douglas 416 stainless steel with 1-7 twist with M4 feed ramps Good call. On AR9's, I understand the distance between the Mag Follower and the Feed Ramp is a known complication in the design. Instead, I just loaded up each mag with two rounds, and pushed the rounds forward by hand until the tip of . I prefer them. Full M4 feed ramps start on the upper and continue onto the barrel extension. The barrels also had to be modified. 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. I think your mistaking that with adding ramps to the receiver. I am having a tough time finding an in-stock barrel (18 or 20 incher) with a rifle extension on it. Here you can see an upper with "rifle" feedramps. which is bad combo. Lol. However Ive built numerous ar15 and lr308 rifles and pistols. They were not intended to be super long range man killers. M4 feed ramps are not an original design, they were designed for the M4 In fact, the . I cant advise on that one folks. The best case is to have both an upper and barrel that have the feed ramps. Edited April 27, 2014 by Mark Gale DSA has fat top, Mueller, non feed ramp uppers for $40. 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. Metal cases ammunition such as Wolf through an M4 clone? AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. Dec 17, 2020. Description. What's the difference? There is no way to make a carbine barrel extension out of a rifle barrel extension, period, full stop. 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. As a result, the factory machined M4 feed ramps on the receiver are hard coat anodized which adds significant strength to the aluminum. i have an extra brand new M4 barrel extension ramp to replace a rifle ramp. Its also recommended you polish the ramps once youve achieved the appropriate angle. In case My barrel is rifle ramp it won't be so bad after all. Amazing what happens in a thread over a simple question. Required fields are marked *. For use by barrel manufacturers. I'll probably build a pistol out of this one. FN AR-15 5.56X45mm Nato . 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. So, what is the difference between M4 feed ramps and regular ones? 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. I'm a machinist in the aerospace industry and lucky enough to have. I have a 723 build (w/ C7 upper) and a 727 build (A2 upper) that use 14.5" Colt M4 barrels. Founded by Frank Galli in 2000, Snipers Hide has been offering informational videos, podcasts, and other support to its users in one location. pictures would help. The angle is going to be key, alot of people attempt to mimic the angle of the barrel feed ramps, this is incorrect. It is milled out of 6061 T6. The best case is to have both an upper and barrel that have the feed ramps. That puts the cartridge in a position where the extended feed ramp improves the breech-loading design. 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. Married pretty well with my Seekins machined lower. 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. Load a magazine with two or three rounds, lock the bolt group back on your rifle or carbine and insert the magazine. I replaced the M4 feed ramp barrel with a monolithic feed ramp barrel and no more problems. Thats an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. A4 Complete Upper Receiver - 7075 Forged A4 Flat Top Upper Receiver - M4 Feed Ramps Includes: - Add to Cart. Experts advise on 31 degrees+30 minus-zip. You need to match up barrels to receivers for optimum performance. 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.) . However, its rare now to find an upper receiver or a ready-to-go barrel that doesnt have the M4 cuts. An older-version (or A2-style) feed ramp is cut only on the barrel extension itself (top). Display as a link instead, It has 2 ramps cut into the receiver to help the rounds feed into the chamber. Related: If you are using a Ar rifle, best green laser sight is good choice for hunting. Thanks! 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. He had more to say and added some more engineer and gun designer speak too. Don't ever put non M4 ramped barrel on a M4 ramped upper receiver. Does NOT include pin 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. This USGI modification was done to both the barrel extension and the upper receiver, creating a longer and steeper feed ramp. 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. Powered by Invision Community. You will be able to leave a comment after signing in, AR15Armory.com With the increased use of larger-diameter cased cartridges, the M4 feed ramps are proving their values when using them in those cartridges. Thanks. And that is the important thing! 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-. If you have a bolt that you would like to use you are welcome to ship it to us for accurate headspace. I use it for hunting dogs only. While I've got everything apart, I'm thinking I just want to put an M4 barrel extension on. All uppers are assembled cleaned and tested before shipping. 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. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. I've seen that pic, it is a good reference. 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? Thanks for explaining the feed ramp topic in a couple of different ways. You can put a M4 barrel and non-M4 receiver together, but you can't mismatch them the other way. Modern Series Barrels. 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've seen uppers with and without anodizing on M4 ramps . it seems to me to be about 50/50 with and without. They are also 1/7 twist, 4150 steel, chrome lined, and button rifled like the real deal! Add 3% to the total cost for credit card purchases. 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. 4. Only took a few minutes. By Yamil Sued August 6, 2021. . FFL Fax: 866-721-8691. *Must have a registered ARFCOM account to win. "A Bad Day At The Range Is Better Than A Great Day Working". This space is for pictures of "retro" Stoner rifles and completed or partial retro AR-15 builds, as well as discussions about either. Just because you can, doesn't mean you should. There is a picture of the various options, hopefully another poster can link them. The barrel blanks available are made from 416 Stainless Steel. I've modified barrel/receivers even before M4 cuts came out and done some receivers when the barrels had cuts. 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. Mil-spec is good for the masses, and if you want the job done it is a great start. Either way is good and both types work great with semi auto only guns. i have the rifle barrel. JavaScript is disabled. AAC and anybody else that has any reasonable expectation of quality and reliability use an M4 feed ramp. Whether they materialize or not depends on the direction of the mismatch. 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). ago Costs about $40-50 to have the feed ramps reprofiled from what I can gather. Costs about $40-50 to have the feed ramps reprofiled from what I can gather. Clear editor. 3. Thats true overall and good to keep in mind. Higher pressure equte to parts (bcg, buffer, buffer spring, ROUNDS, etc) experiencing much higher wear/tear. Is it worth the extra 50 bucks?" - 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. Press question mark to learn the rest of the keyboard shortcuts. Installing a Luth-AR Rifle Buffer Tube and an A2 Stock #1041. check out the. Rear side of a CZ-75B pistol barrel showing the (here dirty) feed ramp. Some suggest taking a grinder to the extension area. You absolutely do not want it the other way around however. We want you, our readers, to be able to make informed decisions. There's a 7 degree difference between standard and M4 ramps. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. A couple of times I ended up with the OK set up from the picture above. Our 6mm ARC barrel come standard with 1-7.5 Twist, M4 Feed Ramps and gas tube. Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? I'd rather just pay the gunsmith to make it work than hunt down another barrel/upper if possible. So, an M4 feed ramp includes the barrel extension and the upper. Press J to jump to the feed. BUT, I DO NOT TRUST MY LIFE TO THAT WEAPON. 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. Snipers Hide is a community of Snipers of all kinds, focusing on long range shooting, accuracy, and ballistics. 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). I notice that's a Gibbz (or Gibbz-type) upper. 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? Factory said its fine . If it's happening regularly, check the magazines you are using for serviceability. 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. Moreover, telling someone that an extension can be modified, while not a lie, is nothing more than mental masturbation when your post contains a caveat for having the knowledge and proper tools. However, they do have M4 feed-ramps which is not clone correct. 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.

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