Go back to writing school. The M4, and the CAR-15, before it have had similar problems like the ones you mentioned. The A2's are pretty reliable guns, but trashed mags can cause them to have malfunctions also. Both. Some, me included, have said that the M4 ramps are a help to some of the larger-diameter cartridges in use, such as 6.5 Grendel or .22 Nosler. They aid in feeding the round into the chamber from the magazine more easily, which make uppers and barrel extension matched. A couple of times I ended up with the OK set up from the picture above. If it's happening regularly, check the magazines you are using for serviceability. 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. LanceRiley, I've shot a good deal of rounds through 20" A2's and I realize they run but you are describing issues that the M4 feed ramps alleviate, that would probably be good to reduce on A2's as well. Lol. 50 bucks one way or the other on the barrel ain't squat! I found the article very informative. Do you have an AR barrel or feed ramp tip? Thats an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. And it appears that the bolt is slamming into the top of the bullet. I had seen these pix years ago and dismissed the idea of mix and match. Also, barrel life is relative. Machined from 4150 Chrome Moly Vanadium Steel and feature a QPQ corrosion resistant finish and QPQ coated M4 feed ramp extension. Here you can see an upper with "rifle" feedramps. If your mag catch is at Spec height, you should not have a problem with an M4 cut barrel in a rifle receiver. 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. This Kit is made to cut or polish the STEEL Feed Ramps on your Barrel Extension ONLY. Not saying a really good gunsmith cant do it, just that theres a bit of an involved process. - The Shooter's Log, 2012 SHOT Show Special Report: Del-Ton TRX Rifle and More! With the increased use of larger-diameter cased cartridges, the M4 feed ramps are proving their values when using them in those cartridges. Most work performed while-you-wait, evening and saturday appointments available. Then the manufacturer discontinued the barrel. I read in Bravo company that there are 2 kinds of flat top upper. There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. Copyright 2016 - 2023 by AdventureFootstep.com. 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. I didn't forsee that we'd ever see the day when replacement parts would be so hard to get. [ARCHIVED THREAD] - M4 feed ramp barrel in a non M4 ramp upper. There is no way to make a carbine barrel extension out of a rifle barrel extension, period, full stop. Product Details Douglas 18" Flat Dark Earth Cerakoted 416 stainless steel barrel with 1-7 twist and M4 feed ramps. The manufacturer said they had sold hundreds of barrels with out problems reported. They offer a lower, more extensive, and smoother entry for any round of ammo, whether its necessary or not. 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. First of Im not a gunsmith or firearms professional. 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. 308 m5 using m4 feed ramps, which I belive are for the smaller round like. M4 16", SBN, 1:7, 5.56 NATO Barrel Specifications: - Caliber: 5.56 NATO (.223 REM) - Gas Tube: Car Add to Cart. It may not display this or other websites correctly. You must log in or register to reply here. There's a 7 degree difference between standard and M4 ramps. Change the angle so that the ramp ends at the exact same point. Little polish. I've seen that pic, it is a good reference. That puts the cartridge in a position where the extended feed ramp improves the breech-loading design. if you are OK with 3MOA, you might go 20,000 rounds! Only took a few minutes. AAC and anybody else that has any reasonable expectation of quality and reliability use an M4 feed ramp. The M4 style feed ramps and barrel extension provide consistent feeding and the matte black Manganese Phosphate finish resists external corrosion and oxidation. 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). This gave it a longer point for the magazine to allow the rounds to come out of the magazine and feed into the chamber. They were not intended to be super long range man killers. Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? If you consider this article useful, share it with anyone in need! I would just make sure to order rifle upper with rifle barrel extension or M4 upper with M4 barrel extension. I picked up a side charging upper from Sundevil last year. The M4 ramps, if I am not mistaken, were originally made to help reduce malfunctions on the M4 carbine. FN AR-15 5.56X45mm Nato . 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. Id just get one for that barrel and find a barrel with m4 extension for the upper you already have. Factory said its fine . Would not feed to save its life! How long your barrel "lasts" depends on what your accuracy threshold is before you decide it is too bad to keep using. 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. I got my help from this thread, and thank you again to ORD. Some gun owners believe that the M4 ramps can help for some of the larger-diameter cartridges in use. 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. M16's fed pretty well before the M4 feed ramps were introduced. If you have a bolt that you would like to use you are welcome to ship it to us for accurate headspace. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. The barrel is supposed to have the M4 feed ramps. I will check with compass lake. Amazing what happens in a thread over a simple question. Shorter length equates to much higher pressure in the upper receiver. http://www.ar15fornoobs.com/wp-content/uploads/feedramps.jpg. Barrel, sight and trigger work on most pistols and shotguns. Gun smith said , not head spaced properly. M4 extension with .350 M4 style feed ramps 11 Degree Target Crown Threaded Muzzle 5/8"x24 TPI Weight: 26.5 ounces practical_man 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. Seems counter intuitive to recommend an M4 cut upper, especially if the barrel Im looking at has the rifle feed ramp (not M4 cut). is the m4 feedramp common in barrel extensions? 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. Recommend using a gunsmith this route too if you are not comfortable. We want you, our readers, to be able to make informed decisions. Can I use a barrel with M4 feed ramps with an upper that isnt M4 matched? Its a miracle! We reserve the right to edit as appropriate, delete profane, harassing, abusive and spam comments or posts, and block repeat offenders. There is a picture of the various options, hopefully another poster can link them. Everything that you have on your side to make any weapons more reliable and work when it absolutely needs to is a plus. I'll probably build a pistol out of this one. However, its rare now to find an upper receiver or a ready-to-go barrel that doesnt have the M4 cuts. 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. 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. JavaScript is disabled. Check often for fit. Thank you for answering the question do well. *Must have a registered ARFCOM account to win. By 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. All comments are held for moderation and will appear after approval. I'm planning on replacing my forearm with a Larue 13.5. Thanks for explaining the feed ramp topic in a couple of different ways. Pasted as rich text. upper recievers and barrels are hard to comeby. You are using an out of date browser. Required fields are marked *. Previous. 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. The information provided here does not represent the views of Cheaper Than Dirt! You will be able to leave a comment after signing in, AR15Armory.com Most of barrel assemblies and upper receivers on the market now have a present of M4 feed ramps. Anything else you want to share about M4 clones would be appreciated, especially when it comes to a reliable rifle. 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. A feed ramp is a basic feature of many breech loading cartridge firearm designs. And that is the important thing! The good idea is that the round, presented at a lower plane, will contact other lower feed ramps and go right on in. Gas block area is .750 diameter. Don't ever put non M4 ramped barrel on a M4 ramped upper receiver. All uppers are assembled cleaned and tested before shipping. Finding the proper upper receiver is your best option. Thanks. I've been thinking about doing sort of an "Early Diemaco C8 carbine" clone build with a C7 style upper receiver. AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. what does it do?? To conclude, the M4 feed ramps bring a lot of improvements to the AR-platform firearms. Does it make a big difference? Notify me of follow-up comments by email. Now, theres nothing wrong at all with a little polish on any and all feed ramps, which can not only be done fairly easily, it can be successfully done by most at home. The barrel Throat is the second most critical component after angles and should be polished with utmost care. However, they do have M4 feed-ramps which is not clone correct. These Mil-Spec M4 feed ramps are part of the original CNC manufacturing process. It gives a longer ramp that is less steep into the chamber. 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. By the time you made it work you spent more time, money, and effort than if you just bought a new barrel or upper. On AR9's, I understand the distance between the Mag Follower and the Feed Ramp is a known complication in the design. M4 feed ramps will extend the barrel extension and the upper receiver. Bullets tend to bump, snag, and stub on these guns. What is the difference between Modern, Performance, and Premium Series Barrels? . What's the difference? 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. The tip of the cartridge rarely comes into contact with the upper receiver. Forged 7075-T6 aluminum is harder than a bulls balls. This is a big tip, by the way, for pistol-caliber ARs. what I fear the most is having an m4 ramp upper and then getting a barrel with a rifle ramp. 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. Full M4 feed ramps start on the upper and continue onto the barrel extension. As they are becoming more and more a standard, and certainly do not do any harm to us. The M4 receiver feed ramps are cut at a steeper angle and, as a result, extend down into the receiver wall. Don't forget read more information about it here! I've modified barrel/receivers even before M4 cuts came out and done some receivers when the barrels had cuts. 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. Please be respectful of others. I'm a machinist in the aerospace industry and lucky enough to have. 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. May 17, 2008 in The Armorer. It's best to use rifle/rifle combo or M4/M4. In most cases the ramps only help during full auto mode while cycling at a high rate. 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. A4 Complete Upper Receiver. Just because you can, doesn't mean you should. Costs about $40-50 to have the feed ramps reprofiled from what I can gather. The first reason is that they are, indeed, better. For the purposes of this chapter, we'll call the new one the M4, and the old one the AR. 30 cal. Sent back again. 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. Create Account; Log Out ; Log In ; Wishlist 0; Shopping Cart 0; Home; About The Mission of Cheaper Than Dirt! Looking to spend $180-250 (depending on condition, forge mark and if a rear sight is included or not.) I don't have much to add re: feed ramps, but. The barrel extension and the receiver both have to have the cuts. 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. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. 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. this is the barrel designed and profiled for the Mark 12 Mod 0 uppers and rifles. 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. Absolutely nothing to do with casing diameter, or whatever other weird sht you guys imagine. Ideally both. Notice how the ramp starts on the barrel extension and not in the receiver. I recommend putting any AR-platform firearm together with a matched M4 barrel extension and upper receiver set, just because you can. So, what is the difference between M4 feed ramps and regular ones? Barrels are Douglas 416 stainless steel with 1-7 twist with M4 feed ramps The rifle-platform M16s dont use them. Load a magazine with two or three rounds, lock the bolt group back on your rifle or carbine and insert the magazine. Jams and misfires. 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). 2. 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 should have taken my own advice for once. again, Thanks. Semi autos run slower than full autos. Your email address will not be published. Press question mark to learn the rest of the keyboard shortcuts. They provide a lower, wider, and smoother entry for any round of ammo, whether its necessary or not. Press J to jump to the feed. Rifles, Uppers, Lowers, Barrels, and more, [ARCHIVED THREAD] - Rifle vs m4 feed ramps, http://i135.photobucket.com/albums/q125/PursuitSS/Postings%20photos/c0d26170b75c3e6f9ea65a7d0862247e.jpg. Its easier to add feed ramps to the receiver not so easy to add them to the barrel extension. If a barrel comes with the feed ramps could I take them off? I cant advise on that one folks. I will attest that a rifle upper and a barrel with the M4 feedramps works just fine. 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. 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.

Dental Offices That Accept Mainecare, Publix Customer Service Team Leader Job Description, Articles A