adding m4 feed ramps to barrel
You need to match up barrels to receivers for optimum performance. Also, barrel life is relative. Rear side of a CZ-75B pistol barrel showing the (here dirty) feed ramp. If your upper isn't showing signs of bullets rubbing on the aluminum under the barrel extension, you should be good with M4 ramps. Product Details Douglas 18" Flat Dark Earth Cerakoted 416 stainless steel barrel with 1-7 twist and M4 feed ramps. 50 bucks one way or the other on the barrel ain't squat! 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 have an extra brand new M4 barrel extension ramp to replace a rifle ramp. Semi autos run slower than full autos. For use by barrel manufacturers. As a result, the factory machined M4 feed ramps on the receiver are hard coat anodized which adds significant strength to the aluminum. 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 For instance I was looking at the BCM upper receiver, and it said it had M4 feed ramps machined into the upper. I recently built an AR9 (Glock Mags) that has been running flawlessly for about 3-400rds. Copyright 1996-2023 AR15.COM LLC. When I function tested it the first time with live half-jacketed rounds I had the worst FTF jam I have ever experienced. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. Recommend using a gunsmith this route too if you are not comfortable. Notify me of follow-up comments by email. Bullets tend to bump, snag, and stub on these guns. No need to alter the upper. check out the. For someone who is new at trying to understand feed ramps it helps to read a couple different explanations. You must log in or register to reply here. Add 3% to the total cost for credit card purchases. The M4 receiver feed ramps are cut at a steeper angle and, as a result, extend down into the receiver wall. It's best to use rifle/rifle combo or M4/M4. However the DD 14.5 are ideally meant to mate up with M4 style upper receiver feedramps. As they are becoming more and more a standard, and certainly do not do any harm to us. Questions on how to install your new BA barrel? 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. It's an interesting question. Rifles, Uppers, Lowers, Barrels, and more, [ARCHIVED THREAD] - Rifle vs m4 feed ramps, http://i135.photobucket.com/albums/q125/PursuitSS/Postings%20photos/c0d26170b75c3e6f9ea65a7d0862247e.jpg. Again, youll find plenty of videos on spooling up hand grinders to remedy feed ramp and ejection port issues with these larger cartridges, but I strongly suggest going factory-done aftermarket. http://www.ar15fornoobs.com/wp-content/uploads/feedramps.jpg. Thats an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. The Fora platform includes forum software by XenForo. One new winner* is announced every week! 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. Create an account to follow your favorite communities and start taking part in conversations. For new construction barrels only. Your previous content has been restored. Load a magazine with two or three rounds, lock the bolt group back on your rifle or carbine and insert the magazine. If you have an account, sign in now to post with your account. The dimensions are different between the two, so theyd have to change some things to the feed ramps dimensions. Copyright 2016 - 2023 by AdventureFootstep.com. Change the angle so that the ramp ends at the exact same point. So I called. Add M4 cuts to Barrel Ext $15.00 We can modify your rifle extension to match the M4 cuts in an upper receiver. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. Both. Is getting it as part of the upper better? 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. Gun smith said , not head spaced properly. 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. 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). All Rights Reserved. M16s and M16-A1s run at 750 rounds per minute in full auto. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. Some suggest taking a grinder to the extension area. I would only add the feed ramps to the receiver if I had feeding issues, which you should not have. Thanks. But, as with anything else, this work can go too far. 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. 's blog. I'll probably build a pistol out of this one. I don't have much to add re: feed ramps, but. hey bro nice to see you here!!! Single Action and Double Action Which One Is Better For You? Not all mil-spec features advertised on the product information are the real mil-specs. 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. It may not display this or other websites correctly. The barrel blanks available are made from 416 Stainless Steel. Sent back again. 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. As suggested, its best to match the upper and barrel extension no worries that way. Dec 17, 2020. I had seen these pix years ago and dismissed the idea of mix and match. The Mission of Cheaper Than Dirt! I'd rather just pay the gunsmith to make it work than hunt down another barrel/upper if possible. This is one time it's better to go a little too far than to leave an edge for the . My experience with ARs is all A-1s. There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. I use it for hunting dogs only. These units actually feature the NON-F-Marked (correct) front sight base. Seems like it should work to me, but be a real challenge to keep clean and be damned ugly to boot. I recommend putting any AR-platform firearm together with a matched M4 barrel extension and upper receiver set, just because you can. On AR9's, I understand the distance between the Mag Follower and the Feed Ramp is a known complication in the design. 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. 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. are all barrels w/ m4 feed ramps?? In this episode of Gun Stock Reviews, we look at the difference between M4 Ramps and the old standard ramps of the past. If you consider this article useful, share it with anyone in need! Its also recommended you polish the ramps once youve achieved the appropriate angle. So I'm working on my first build, and I'm a little confused. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. Looking to spend $180-250 (depending on condition, forge mark and if a rear sight is included or not.) Full M4 feed ramps are on both the upper and barrel extension. Theres a bit more to it than just polishing. $101.95. 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. I cant advise on that one folks. 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. 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. Polishing the edges of the chamber mouth to remove the edges of that chamfer will. Experts advise on 31 degrees+30 minus-zip. I checked what I have now. Supposedly you'll only notice issues with rapid/auto fire with a configuration like this. 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. The last is using the best and right ammo for the job. 30 cal. and add them to non-m4 barrels.? Paste as plain text instead, 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. Anodized red parts. Full M4 feed ramps start on the upper and continue onto the barrel extension. M4 barrel to non M4 receiver is fine, but not the other way around. I should have taken my own advice for once. On the other hand, I wouldn't consider them as a deal breaker, and they would not pass up a good deal with an upper only because it did not have them - the M4 feed ramps. This is a big tip, by the way, for pistol-caliber ARs. Thread: Adding M4 feedramps to A1/C7 upper. Factory said its fine . Hasn't misfed yet, through initial break in up through 1k rounds, and that's mag length ammo. 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. can you buy feed ramps individually? 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. True, which is why they're not even needed in semi autos. 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. can the barrel extension be bought individualy? They guide the bullet up and into the chamber. I can assure you that most mods that deviate from the original design aren't 100% reliable. All Rights Reserved. I will attest that a rifle upper and a barrel with the M4 feedramps works just fine. I've seen uppers with and without anodizing on M4 ramps . it seems to me to be about 50/50 with and without. Only took a few minutes. Any use of this content without express written consent is prohibited. The difference between standard feed ramps and M4 ramps is easy to see. Get The Best Trigger Pull Gauges To Make Every Shot Count. However, its rare now to find an upper receiver or a ready-to-go barrel that doesnt have the M4 cuts. Don't ever put non M4 ramped barrel on a M4 ramped upper receiver. What is an m4 feed ramp? Can I use a barrel with M4 feed ramps with an upper that isnt M4 matched? Ballistic Performance of Federal Punch .22 LR Ammunition with the Heritage Barkeep #1063. You also repeated yourself. No feed ramps. Try this little exercise: 1. If you have a bolt that you would like to use you are welcome to ship it to us for accurate headspace. Personally, I would sell the rifle upper and buy an M4 upper - the cost will be small and you will end up with a more satisfactory end product. You have a rifle barrel. They are also 1/7 twist, 4150 steel, chrome lined, and button rifled like the real deal! LanceRiley, Just because you can, doesn't mean you should. Do you have an AR barrel or feed ramp tip? which is bad combo. 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. Reddit and its partners use cookies and similar technologies to provide you with a better experience. 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. Powered by Invision Community. 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. Modern Series Barrels. Thats true overall and good to keep in mind. I can probably get the upper reciever first. I have a 723 build (w/ C7 upper) and a 727 build (A2 upper) that use 14.5" Colt M4 barrels. 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 . Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? 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). If a barrel comes with the feed ramps could I take them off? I've modified barrel/receivers even before M4 cuts came out and done some receivers when the barrels had cuts. 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. AR9 - Help diagnosing feeding issue. M4 feed ramps will extend the barrel extension and the upper receiver. Backing up a ton: The ramps on regular barrel extension are cut just to the edges, while the M4 feed ramps have deeper cuts in the M4-spec upper receiver. First of Im not a gunsmith or firearms professional. 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. pictures would help. Create an account to follow your favorite communities and start taking part in conversations. 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. practical_man The A2's are pretty reliable guns, but trashed mags can cause them to have malfunctions also. Upload or insert images from URL. 338 and others not the .308 76251 or 6.5 creedmore which o think should have a.30cal feed ramp.? The information provided here does not represent the views of Cheaper Than Dirt! By Reliability is the main concern for me when I re-barrel this rifle. Looking for a black stripped A1 upper with non m4 feed ramps (just realized the upper I have wont work with my barrel). Barrel is medium SPR profiled barrel, threaded with a 1/2-28 thread for the AE brakes and collar. 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. The best case is to have both an upper and barrel that have the feed ramps. Everything that you have on your side to make any weapons more reliable and work when it absolutely needs to is a plus. 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. 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. 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. However, they do have M4 feed-ramps which is not clone correct. You are using an out of date browser. Jams and misfires. 1 is a standard and the other for use with m4 feed ramp barrels. Buy AR 15 16" .350 Legend Nitride M4 Profile Barrel 1:16: GunBroker is the largest seller of AR15 Parts Gun Parts All: 974000728 .