So, an M4 feed ramp includes the barrel extension and the upper. They offer a lower, more extensive, and smoother entry for any round of ammo, whether its necessary or not. I didnt think anything about it having M4 feed ramps. 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! All Rights Reserved. Thank you for answering the question do well. The M4 ramps, if I am not mistaken, were originally made to help reduce malfunctions on the M4 carbine. Press J to jump to the feed. Paste as plain text instead, M4 can better explain their benefit, although they help with more reliable feeding. All uppers are assembled cleaned and tested before shipping. 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. Sorta. The only one I found is LaRue's upper, but it won't work with the hand guard I'm using (Geissele MKIII). Feedramps, proper staking of castle nuts, forward assist (yep went there)S-happens seen it. I cant advise on that one folks. . [ARCHIVED THREAD] - M4 feed ramp barrel in a non M4 ramp upper. I think your mistaking that with adding ramps to the receiver. 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. Try this little exercise: 1. May 17, 2008 in The Armorer. Amazing what happens in a thread over a simple question. You have a rifle barrel. I've seen that pic, it is a good reference. 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. Would not feed to save its life! Then the manufacturer discontinued the barrel. Powered by Invision Community, M4-style barrel extension with Rifle-type upper. No need to alter the upper. And it appears that the bolt is slamming into the top of the bullet. So, what is the difference between M4 feed ramps and regular ones? if you are OK with 3MOA, you might go 20,000 rounds! Barrel, sight and trigger work on most pistols and shotguns. Notice how the ramp starts on the barrel extension and not in the receiver. M4 Feed ramps on barrel extensions are a solid example. *Must have a registered ARFCOM account to win. upper recievers and barrels are hard to comeby. Guess what? The parts are interchangeable. 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. again, Thanks. I replaced the M4 feed ramp barrel with a monolithic feed ramp barrel and no more problems. 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. It has ran flawlessly (barring tuning of the gasblock when new) with several different brands of magazines and ammo. Seems counter intuitive to recommend an M4 cut upper, especially if the barrel Im looking at has the rifle feed ramp (not M4 cut). By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. M4 feed ramps. Sent back again. I notice that's a Gibbz (or Gibbz-type) upper. The manufacturer said they had sold hundreds of barrels with out problems reported. 50 bucks one way or the other on the barrel ain't squat! Rifles, Uppers, Lowers, Barrels, and more, [ARCHIVED THREAD] - Rifle vs m4 feed ramps, http://i135.photobucket.com/albums/q125/PursuitSS/Postings%20photos/c0d26170b75c3e6f9ea65a7d0862247e.jpg. By 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. The good idea is that the round, presented at a lower plane, will contact other lower feed ramps and go right on in. AR9 - Help diagnosing feeding issue. Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? All this basically means is that the ramps continue from the barrel extension down through the upper receiver tonthe magazine. Seems M4 is all the rage these days. They . Your previous content has been restored. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. Some argue that, factually, its a step to enable a smoother feeding. I would just make sure to order rifle upper with rifle barrel extension or M4 upper with M4 barrel extension. 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. Bullets tend to bump, snag, and stub on these guns. BUT if you find someone to grind your feed ramps and they do a good job, post it up and let us know. We have four combinations here: 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. 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! While I've got everything apart, I'm thinking I just want to put an M4 barrel extension on. Gun smith said , not head spaced properly. Little polish. However Ive built numerous ar15 and lr308 rifles and pistols. So I'm working on my first build, and I'm a little confused. If it's happening regularly, check the magazines you are using for serviceability. Avoid Polishing Too Lightly Or Too Roughly Notify me of follow-up comments by email. Higher pressure equte to parts (bcg, buffer, buffer spring, ROUNDS, etc) experiencing much higher wear/tear. are all barrels w/ m4 feed ramps?? I didn't forsee that we'd ever see the day when replacement parts would be so hard to get. Go back to writing school. I've seen uppers with and without anodizing on M4 ramps . it seems to me to be about 50/50 with and without. I should have taken my own advice for once. What is an m4 feed ramp? With the increased use of larger-diameter cased cartridges, the M4 feed ramps are proving their values when using them in those cartridges. In short, if you have a Dremmel you can do it yourself. 1 is a standard and the other for use with m4 feed ramp barrels. Lol. The closest brand new barrel you are likely to find is the Windham Weaponry 20 inch 1/7 twist chrome lined barrel. Finding the proper upper receiver is your best option. Display as a link instead, An older-version (or A2-style) feed ramp is cut only on the barrel extension itself (top). The M-16/M4 are great weapons. LanceRiley, Buy AR 15 16" .350 Legend Nitride M4 Profile Barrel 1:16: GunBroker is the largest seller of AR15 Parts Gun Parts All: 974000728 . That puts the cartridge in a position where the extended feed ramp improves the breech-loading design. Most work performed while-you-wait, evening and saturday appointments available. Remember less is more, little by little. 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 All comments are held for moderation and will appear after approval. Feeds flawlessly. Either way is good and both types work great with semi auto only guns. 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. 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). All NFA rules apply. I have looked and looked and looked. You also repeated yourself. practical_man Do you have an AR barrel or feed ramp tip? 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. Either way is good and both types work great with semi auto only guns. Modern Series Barrels. 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. Go slow and you'll be done in no time. The first reason is that they are, indeed, better. The information provided here does not represent the views of Cheaper Than Dirt! We want you, our readers, to be able to make informed decisions. 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? M4 16", SBN, 1:7, 5.56 NATO Barrel Specifications: - Caliber: 5.56 NATO (.223 REM) - Gas Tube: Car Add to Cart. I checked what I have now. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. "It will last 5k rounds instead of 4k. There's a 7 degree difference between standard and M4 ramps. However the DD 14.5 are ideally meant to mate up with M4 style upper receiver feedramps. AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. You want them to match. pictures would help. 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. I'm a machinist in the aerospace industry and lucky enough to have. We're a little past that point as I already own both the barrel and receiver, both of which cant easily be replaced or swapped for a decent price. They provide a lower, wider, and smoother entry for any round of ammo, whether its necessary or not. However, they do have M4 feed-ramps which is not clone correct. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. Description. 16" Pre-Ban M4 Profile Barrel Assembly CARBINE Gas System About Upper assembly comes completely head spaced and test fired. If you don't clean it but demand 3/4MOA you might get 1,500. 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 Ar-15 Manufacturers Should Be Avoided: Which Should You Buy? 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. $101.95. Some suggest taking a grinder to the extension area. 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. 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. Previous. 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. FN AR-15 5.56X45mm Nato . BUT, I DO NOT TRUST MY LIFE TO THAT WEAPON. As a result, the factory machined M4 feed ramps on the receiver are hard coat anodized which adds significant strength to the aluminum. The difference between standard feed ramps and M4 ramps is easy to see. A couple of times I ended up with the OK set up from the picture above. Anything else you want to share about M4 clones would be appreciated, especially when it comes to a reliable rifle. 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. I can assure you that most mods that deviate from the original design aren't 100% reliable. 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. Those ramps line up with the barrel, which are cut deeper than on a rifle barrel. 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. Gas block area is .750 diameter. Polishing the edges of the chamber mouth to remove the edges of that chamfer will. 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. The angle is going to be key, alot of people attempt to mimic the angle of the barrel feed ramps, this is incorrect. Is it worth the extra 50 bucks?" check out the. 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.