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- The Shooter's Log, 2012 SHOT Show Special Report: Del-Ton TRX Rifle and More! The barrel extension and the receiver both have to have the cuts. Upload or insert images from URL. 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). 338 and others not the .308 76251 or 6.5 creedmore which o think should have a.30cal feed ramp.? I just need a little guidance on this and I'm having trouble getting good results from Google. aaargh.. that's the setup I hate to see. 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 Clear editor. Seems counter intuitive to recommend an M4 cut upper, especially if the barrel Im looking at has the rifle feed ramp (not M4 cut). Use this M4 Barrel extention with M4 feedramps. Ready to drop onto a complete lower receiver. In short, if you have a Dremmel you can do it yourself. Founded by Frank Galli in 2000, Snipers Hide has been offering informational videos, podcasts, and other support to its users in one location. 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. I have a non ramped barrel in a ramped upper, feeds fine. Site towers are not "F" marked SPECS: Length- 14.5". Oh well, as I tell my lovely and understanding bride, guns are relatively free. it's the ammo and training that cost real money. The ramp angles are different and changing the profile of the extension doesn't make it something it isn't. 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. $101.95. 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. 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 just make sure to order rifle upper with rifle barrel extension or M4 upper with M4 barrel extension. Also, barrel life is relative. 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. What is the difference between Modern, Performance, and Premium Series Barrels? CARBON-15 Stripped Lower Receiver All NFA rules apply. It has ran flawlessly (barring tuning of the gasblock when new) with several different brands of magazines and ammo. And it appears that the bolt is slamming into the top of the bullet. 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. Please allow 5~10 days for assembly and testing before ship date. 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. 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. Thats true overall and good to keep in mind. And that is the important thing! Your email address will not be published. For new construction barrels only. 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 practical_man You cannot paste images directly. So the engineers lowered the feed rampa into the receiver. M16's fed pretty well before the M4 feed ramps were introduced. All things being equal and having used both weapons extensively, Id rather have the feed Ramps. The only one I found is LaRue's upper, but it won't work with the hand guard I'm using (Geissele MKIII). You must log in or register to reply here. Will my A3 upper reciever work with my M4 barrel extention.According to some or your posts they will.Thanks Bill. 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. The tip of the cartridge rarely comes into contact with the upper receiver. You have a rifle barrel. 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. I don't quite trust myself to give it a go, but if that's all there is to it I'm hoping they can do it for a reasonable price. I had seen these pix years ago and dismissed the idea of mix and match. Get The Best Trigger Pull Gauges To Make Every Shot Count. Proper maintenance and lubrication. M4 ramps help in feeding in for carbine in full auto. Create an account to follow your favorite communities and start taking part in conversations. Read Now. You are using an out of date browser. hey bro nice to see you here!!! 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? But, as with anything else, this work can go too far. When I function tested it the first time with live half-jacketed rounds I had the worst FTF jam I have ever experienced. For the purposes of this chapter, we'll call the new one the M4, and the old one the AR. I'm lookin for a clear definition as to what they are, and what they do to enhance a given rifle's performance? Notice how the ramp starts on the barrel extension and not in the receiver. instead of mil-spec. Then you can get a regular rifle barrel for the upper with no 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. However the DD 14.5 are ideally meant to mate up with M4 style upper receiver feedramps. So, lets glide down these lines below to erase your misconceptions about them. M4 feed ramps are not an original design, they were designed for the M4 In fact, the . If you don't clean it but demand 3/4MOA you might get 1,500. I checked what I have now. 3. M4 Feed ramps on barrel extensions are a solid example. 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. 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. Issues can arise when receivers and barrel extensions are mismatched. If it was some flat top + 16" FSB barrel id just swap upper/barrel, but this is a little more challenging to do that with. 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 . Earlfillmore 13 hr. 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. are all barrels w/ m4 feed ramps?? A couple of times I ended up with the OK set up from the picture above. Its easier to add feed ramps to the receiver not so easy to add them to the barrel extension. Feeds flawlessly. M16s and M16-A1s run at 750 rounds per minute in full auto. what I fear the most is having an m4 ramp upper and then getting a barrel with a rifle ramp. In general, all you need to understand is that the M4 feed ramps include the barrel extension and upper receiver. Any use of this content without express written consent is prohibited. True, which is why they're not even needed in semi autos. There is a picture of the various options, hopefully another poster can link them. 's blog. I have a 723 build (w/ C7 upper) and a 727 build (A2 upper) that use 14.5" Colt M4 barrels. However Ive built numerous ar15 and lr308 rifles and pistols. As a result, the factory machined M4 feed ramps on the receiver are hard coat anodized which adds significant strength to the aluminum. That's an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. Would not feed to save its life! Seems like it should work to me, but be a real challenge to keep clean and be damned ugly to boot. It's best to have M4 ramps on both the upper and barrel. Forged 7075-T6 aluminum is harder than a bulls balls. Brevity matters. 4. So I called. The best case is to have both an upper and barrel that have the feed ramps. 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. Pasted as rich text. Description. Then the manufacturer discontinued the barrel. If I have a rifle ramp upper and get the barrel later and coincidentally will have an m4 ramp. It is milled out of 6061 T6. The Shooter's Log, is to provide informationnot opinionsto our customers and the shooting community. Thank you for answering the question do well. 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. Modern Series Barrels. Not saying a really good gunsmith cant do it, just that theres a bit of an involved process. You also repeated yourself. "A Bad Day At The Range Is Better Than A Great Day Working". That puts the cartridge in a position where the extended feed ramp improves the breech-loading design. Rear side of a CZ-75B pistol barrel showing the (here dirty) feed ramp. What's the difference? The Mission of Cheaper Than Dirt! 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. Little polish. Reddit and its partners use cookies and similar technologies to provide you with a better experience. Feed ramps on barrel extensions are a good example. The good idea is that the round, presented at a lower plane, will contact other lower feed ramps and go right on in. 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. Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? JavaScript is disabled. 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. All uppers are assembled cleaned and tested before shipping. All this basically means is that the ramps continue from the barrel extension down through the upper receiver tonthe magazine. Go back to writing school. Barrel, sight and trigger work on most pistols and shotguns. The M4 ramps, if I am not mistaken, were originally made to help reduce malfunctions on the M4 carbine. The only other time it seems to help is if the mag is feeding the rounds with the bullet slightly angled lower than normal. Is one better than the other? Lol. AR9 - Help diagnosing feeding issue. 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. Press question mark to learn the rest of the keyboard shortcuts. This has been my concern with modifying the aluminum parts. Married pretty well with my Seekins machined lower. I wouldn't be concerned at all with any wear after modifying an upper receiver. Product Description Surplus Colt 14.5" SOCOM, carbine length gas system barrel from Colt. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. I like all my guns to be reliable. so im thinking I might as well just get the unramp upper. There's a 7 degree difference between standard and M4 ramps. Try this little exercise: 1. One new winner* is announced every week! I can assure you that most mods that deviate from the original design aren't 100% reliable. There is no way to make a carbine barrel extension out of a rifle barrel extension, period, full stop. Watch a video about our Modern Series AR barrel: The parts are interchangeable. It is removeable with a special wrench and a barrel clamp/vise. If you ever have an issue, then look at getting a correct barrel for the upper. 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. Interesting reading. 16" Pre-Ban M4 Profile Barrel Assembly CARBINE Gas System About Upper assembly comes completely head spaced and test fired. I will check with compass lake. On AR9's, I understand the distance between the Mag Follower and the Feed Ramp is a known complication in the design. Is getting it as part of the upper better? Hasn't misfed yet, through initial break in up through 1k rounds, and that's mag length ammo. [ARCHIVED THREAD] - M4 feed ramp barrel in a non M4 ramp upper. and add them to non-m4 barrels.? You can post now and register later. I'd rather just pay the gunsmith to make it work than hunt down another barrel/upper if possible. Create Account; Log Out ; Log In ; Wishlist 0; Shopping Cart 0; Home; About It was in the last few issues of SAR. Required fields are marked *. Ballistic Performance of Federal Punch .22 LR Ammunition with the Heritage Barkeep #1063. To measure just where the round makes impact on the feed ramps, I did not use any sort of micrometer to measure. Feed ramps being m4 or. The extension is the part at the end of the barrel that fits inside the upper. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. The angle is going to be key, alot of people attempt to mimic the angle of the barrel feed ramps, this is incorrect. Factory said its fine . Most of barrel assemblies and upper receivers on the market now have a present of M4 feed ramps. So there's a lot more going on with rounds bouncing up and down in the mags etc. 2. For instance I was looking at the BCM upper receiver, and it said it had M4 feed ramps machined into the upper. which is bad combo. It's an interesting question. Thats why AR10s- And Scar heavies exist for. I too built a .458 SOCOM carbine . 3. The best case is to have both an upper and barrel that have the feed ramps. . Editors Note: This article was originally published in January of 2019. For a better experience, please enable JavaScript in your browser before proceeding. The barrel Throat is the second most critical component after angles and should be polished with utmost care. 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. They provide a lower, wider, and smoother entry for any round of ammo, whether its necessary or not. BrianEnos.com Only took a few minutes. This is a big tip, by the way, for pistol-caliber ARs. I bought a .458 upper to go with it, with the extra internal clearance cut before anodizing. 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. The ramps on the regular rifle-type extension are cut just to the edge of the extension. The M-16/M4 are great weapons. Full M4 feed ramps start on the upper and continue onto the barrel extension. Caught a deal on a matched barrel and bolt. Gun smith said , not head spaced properly. 1 is a standard and the other for use with m4 feed ramp barrels. Snipers Hide is a community of Snipers of all kinds, focusing on long range shooting, accuracy, and ballistics. I've modified barrel/receivers even before M4 cuts came out and done some receivers when the barrels had cuts. For someone who is new at trying to understand feed ramps it helps to read a couple different explanations. Im an old vet, now retired and looking to build some ARs as a hobby to keep me doing something that I will enjoy. In military situations, it is advantageous for rifles to function with damaged, worn, or less than ideally serviceable magazines. Bullets tend to bump, snag, and stub on these guns. The M4 was the first (allegedy) carbine length gas system. Any body need a anchor for a very small boat? Which Model Colt 1911 is For Me? 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). 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. 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. It has 2 ramps cut into the receiver to help the rounds feed into the chamber. Can I use a barrel with M4 feed ramps with an upper that isnt M4 matched? I prefer them. . AAC and anybody else that has any reasonable expectation of quality and reliability use an M4 feed ramp. 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. For use by barrel manufacturers. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. 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.) . Anything else you want to share about M4 clones would be appreciated, especially when it comes to a reliable rifle. Costs about $40-50 to have the feed ramps reprofiled from what I can gather. Just because you can, doesn't mean you should. I have looked and looked and looked. Recommend using a gunsmith this route too if you are not comfortable. Your discussions, feedback and comments are welcome here as long as they are relevant and insightful. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. Supposedly you'll only notice issues with rapid/auto fire with a configuration like this. is the m4 feedramp common in barrel extensions? i have an extra brand new M4 barrel extension ramp to replace a rifle ramp. A4 Complete Upper Receiver - 7075 Forged A4 Flat Top Upper Receiver - M4 Feed Ramps Includes: - Add to Cart. this is the barrel designed and profiled for the Mark 12 Mod 0 uppers and rifles. Semi autos run slower than full autos. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. If it's happening regularly, check the magazines you are using for serviceability. Rifles, Uppers, Lowers, Barrels, and more, [ARCHIVED THREAD] - Rifle vs m4 feed ramps, http://i135.photobucket.com/albums/q125/PursuitSS/Postings%20photos/c0d26170b75c3e6f9ea65a7d0862247e.jpg. 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. Does NOT include pin Everything that you have on your side to make any weapons more reliable and work when it absolutely needs to is a plus. 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. M4 feed ramps will extend the barrel extension and the upper receiver. Id just get one for that barrel and find a barrel with m4 extension for the upper you already have. 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 . I replaced the M4 feed ramp barrel with a monolithic feed ramp barrel and no more problems. Man, its crazy how many of yall have absolutely no idea why you do what you do. Don't ever put non M4 ramped barrel on a M4 ramped upper receiver. Description Genuine 14.5" SOCOM, carbine length gas system barrel from Colt. ago KrinkyDink2 9 hr. Its not a big deal but still an important thing to remember and understand. Single Action and Double Action Which One Is Better For You? When carrying out feed ramp polishing, it is crucial to prioritize the frame's angles, which is a critical part of the feed ramp. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. I didnt think anything about it having M4 feed ramps. Other selections are available for upper, bolt and carrier, charging handle, handguards, flash hiders, and gas blocks. This can lead to a rare but odd situation; barrel and receiver mismatch. Create an account to follow your favorite communities and start taking part in conversations. I will attest that a rifle upper and a barrel with the M4 feedramps works just fine. I've thought about it myself, and I'd like to see test results if any exist, displaying what reliability effect M4 ramps have on other barrel lengths. Press J to jump to the feed. You want them to match. A4 Complete Upper Receiver. Looking for a black stripped A1 upper with non m4 feed ramps (just realized the upper I have wont work with my barrel). I can still use the combination. So, an M4 feed ramp includes the barrel extension and the upper. Whether they materialize or not depends on the direction of the mismatch. 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. It's near impossible to replace the carry handle upper I have these days, and finding a colt chrome lined 20" light weight barrel isn't a walk in the park either. 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. Buy AR 15 16" .350 Legend Nitride M4 Profile Barrel 1:16: GunBroker is the largest seller of AR15 Parts Gun Parts All: 974000728 . 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 upper is designed to have two levels of top rails for mounting of night vision in front of scopes. It gives a longer ramp that is less steep into the chamber. 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. However, they do have M4 feed-ramps which is not clone correct. Seems M4 is all the rage these days. They aid in feeding the round into the chamber from the magazine more easily, which make uppers and barrel extension matched. /r/ar15 is here for your favorite black gun links, build pics, questions and other tactical or practical information. 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). 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. However, an M4 barrel extension is dished more so the feed ramps could extend downward, and then an area within the upper is shaped to match. Add 3% to the total cost for credit card purchases. can the barrel extension be bought individualy? Sorta. 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. Its also recommended you polish the ramps once youve achieved the appropriate angle. You will be able to leave a comment after signing in, AR15Armory.com Gas block area is .750 diameter.