Here's some info from Randall Rauch aka www.ar15barrels.com, if your barrel extension has M4 ramps you should have an upper receiver also with the ramps. Reliability is the main concern for me when I re-barrel this rifle. DSA has fat top, Mueller, non feed ramp uppers for $40. Buy AR 15 16" .350 Legend Nitride M4 Profile Barrel 1:16: GunBroker is the largest seller of AR15 Parts Gun Parts All: 974000728 . All Rights Reserved. Earlfillmore 13 hr. Please be respectful of others. I would just make sure to order rifle upper with rifle barrel extension or M4 upper with M4 barrel extension. BEFORE YOU GO MODIFYING IT, check your headspace.I have a Gibbz upper in my junk drawer because the upper -- for some reason -- wouldn't allow a perfectly good bolt (as checked by Criterion) to headspace correctly on a Criterion barrel, with the bolt installed in the carrier. What is an m4 feed ramp? Not saying a really good gunsmith cant do it, just that theres a bit of an involved process. Just put it in and shoot it. are all barrels w/ m4 feed ramps?? As a result, the factory machined M4 feed ramps on the receiver are hard coat anodized which adds significant strength to the aluminum. 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. Modern Series Barrels. Theres a bit more to it than just polishing. 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. Copyright 2016 - 2023 by AdventureFootstep.com. First of Im not a gunsmith or firearms professional. hey bro nice to see you here!!! Load a magazine with two or three rounds, lock the bolt group back on your rifle or carbine and insert the magazine. 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. M4 16", SBN, 1:7, 5.56 NATO Barrel Specifications: - Caliber: 5.56 NATO (.223 REM) - Gas Tube: Car Add to Cart. Went back to the sellers website and found I was not the only one with problems. In case My barrel is rifle ramp it won't be so bad after all. 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). document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Owning Best Ruger SR9c Accessories Can Change Your Life. 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 You are using an out of date browser. Its also recommended you polish the ramps once youve achieved the appropriate angle. 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. ago KrinkyDink2 9 hr. from my service in the 70s to my personal weapons, all of my ARs are early 1970 slab sided Colt SP1s. We want you, our readers, to be able to make informed decisions. Notice how the ramp starts on the barrel extension and not in the receiver. Edited April 27, 2014 by Mark Gale 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. 's blog. One new winner* is announced every week! I have looked and looked and looked. - The Shooter's Log, 2012 SHOT Show Special Report: Del-Ton TRX Rifle and More! Copyright 1996-2023 AR15.COM LLC. Any body need a anchor for a very small boat? Create an account to follow your favorite communities and start taking part in conversations. 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. Remember less is more, little by little. They offer a lower, more extensive, and smoother entry for any round of ammo, whether its necessary or not. They provide a lower, wider, and smoother entry for any round of ammo, whether its necessary or not. Upload or insert images from URL. 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. M4 ramps help in feeding in for carbine in full auto. I'd rather not spent the money to get it cut to the specific length I need, FSB installed, etc just to have it immediately not work and have to sort out then or start from square one with a new barrel. Backing up a ton: Any and all AR-15 barrel extensions have feed ramps. which is bad combo. which is basicallly an m16a1 cut down. 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? The barrel blanks available are made from 416 Stainless Steel. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. This 20" BCM barrel is machined from SS410 stainless steel. pm me at BOG or PG, or get in touch with my number 09177542777 if you're interested. The barrel Throat is the second most critical component after angles and should be polished with utmost care. There's a 7 degree difference between standard and M4 ramps. I'd rather just pay the gunsmith to make it work than hunt down another barrel/upper if possible. Display as a link instead, Ideally both. You have the option of barrel type, thread, fluting, finish type and to add a match bolt. check out the. Anything else you want to share about M4 clones would be appreciated, especially when it comes to a reliable rifle. The information provided here does not represent the views of Cheaper Than Dirt! JavaScript is disabled. On AR9's, I understand the distance between the Mag Follower and the Feed Ramp is a known complication in the design. Most of barrel assemblies and upper receivers on the market now have a present of M4 feed ramps. It's best to have M4 ramps on both the upper and barrel. Looking to spend $180-250 (depending on condition, forge mark and if a rear sight is included or not.) Product Details Douglas 18" Flat Dark Earth Cerakoted 416 stainless steel barrel with 1-7 twist and M4 feed ramps. M4 extension with .350 M4 style feed ramps 11 Degree Target Crown Threaded Muzzle 5/8"x24 TPI Weight: 26.5 ounces Barrel, sight and trigger work on most pistols and shotguns. Not all mil-spec features advertised on the product information are the real mil-specs. With the increased use of larger-diameter cased cartridges, the M4 feed ramps are proving their values when using them in those cartridges. M4 Feed ramps on barrel extensions are a solid example. Does anyone have a follow up that confirms or denies my claim? The A2's are pretty reliable guns, but trashed mags can cause them to have malfunctions also. 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. The ramps are in the barrel extension. 2. That is what I tell people when they try to convince me that they need a stainless barrel instead of chrome-moly. 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. "It will last 5k rounds instead of 4k. My alternative plan is to do exactly as you describe. Barrel customizations are also available. 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. A4 Complete Upper Receiver - 7075 Forged A4 Flat Top Upper Receiver - M4 Feed Ramps Includes: - Add to Cart. Copyright 1996-2023 AR15.COM LLC. 308 m5 using m4 feed ramps, which I belive are for the smaller round like. Ready to drop onto a complete lower receiver. FN AR-15 5.56X45mm Nato . 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. The best case is to have both an upper and barrel that have the feed ramps. practical_man 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 . 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. 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. When you need to nail something you use a hammer not a wrench. Experts advise on 31 degrees+30 minus-zip. All comments are held for moderation and will appear after approval. The extension is the part at the end of the barrel that fits inside the upper. To conclude, the M4 feed ramps bring a lot of improvements to the AR-platform firearms. 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. well.. it's kinda hard to get stuff in this part of the world. I can probably get the upper reciever first. 1 is a standard and the other for use with m4 feed ramp barrels. I think your mistaking that with adding ramps to the receiver. You need to match up barrels to receivers for optimum performance. There is a picture of the various options, hopefully another poster can link them. . Lol. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. I picked up a side charging upper from Sundevil last year. It gives a longer ramp that is less steep into the chamber. Full M4 feed ramps start on the upper and continue onto the barrel extension. If I have a rifle ramp upper and get the barrel later and coincidentally will have an m4 ramp. So there's a lot more going on with rounds bouncing up and down in the mags etc. No feed ramps. 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. Well, over the course of 5,000 rounds at .40 a round, you spent two grand on ammo. I replaced the M4 feed ramp barrel with a monolithic feed ramp barrel and no more problems. Editors Note: This article was originally published in January of 2019. Thanks for explaining the feed ramp topic in a couple of different ways. I recommend putting any AR-platform firearm together with a matched M4 barrel extension and upper receiver set, just because you can. Guess what? 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. Id just get one for that barrel and find a barrel with m4 extension for the upper you already have. 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! Gun smith said , not head spaced properly. Its not a big deal but still an important thing to remember and understand. Higher pressure equte to parts (bcg, buffer, buffer spring, ROUNDS, etc) experiencing much higher wear/tear. AR9 - Help diagnosing feeding issue. Avoid Polishing Too Lightly Or Too Roughly so im thinking I might as well just get the unramp upper. There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. You have a rifle barrel. Your email address will not be published. Thats receivers, bolts, and on down the list of the 100 or so parts that can make up an AR-15. Watch a video about our Modern Series AR barrel: Thread: Adding M4 feedramps to A1/C7 upper. I don't have much to add re: feed ramps, but. 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. You will be able to leave a comment after signing in, AR15Armory.com They aid in feeding the round into the chamber from the magazine more easily, which make uppers and barrel extension matched. I prefer them. I had seen these pix years ago and dismissed the idea of mix and match. Installing a Luth-AR Rifle Buffer Tube and an A2 Stock #1041. Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? This space is for pictures of "retro" Stoner rifles and completed or partial retro AR-15 builds, as well as discussions about either. As they are becoming more and more a standard, and certainly do not do any harm to us. Thats why AR10s- And Scar heavies exist for. Any use of this content without express written consent is prohibited. I notice that's a Gibbz (or Gibbz-type) 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. While I've got everything apart, I'm thinking I just want to put an M4 barrel extension on. Feeds flawlessly. The angle is going to be key, alot of people attempt to mimic the angle of the barrel feed ramps, this is incorrect. I cant advise on that one folks. M4 barrel to non M4 receiver is fine, but not the other way around. If you have a m4 ramped upper but not barrel you can cause problems as there's a lip of steel barrel extension in the way that can cause feeding problems. Good call. Does it make a big difference? Thats true overall and good to keep in mind. Feed ramps on barrel extensions are a good example. A feed ramp is a basic feature of many breech loading cartridge firearm designs. 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. In most cases the ramps only help during full auto mode while cycling at a high rate. There is no way to make a carbine barrel extension out of a rifle barrel extension, period, full stop.
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