I've been thinking about doing sort of an "Early Diemaco C8 carbine" clone build with a C7 style upper receiver. Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? If this is your first visit, be sure to All Rights Reserved. Metal cases ammunition such as Wolf through an M4 clone? "It will last 5k rounds instead of 4k. Required fields are marked *. We have four combinations here: These Mil-Spec M4 feed ramps are part of the original CNC manufacturing process. I like getting another Upper idea then you could end up with two rifles! I'm assuming that you only need the ramps from one or the other. The upper I want to rebarrel is modified for Service Rifle competition so it's not quite as cheap as buying another $89 upper from Aero. The ramps are in the barrel extension. The extension is the part at the end of the barrel that fits inside the upper. It is removeable with a special wrench and a barrel clamp/vise. The manufacturer said they had sold hundreds of barrels with out problems reported. I can assure you that most mods that deviate from the original design aren't 100% reliable. 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? With the increased use of larger-diameter cased cartridges, the M4 feed ramps are proving their values when using them in those cartridges. I should have taken my own advice for once. I wont buy a barrel that isnt a wylde 223 556 but Im only now noticing. I read in Bravo company that there are 2 kinds of flat top upper. - The Shooter's Log, 2012 SHOT Show Special Report: Del-Ton TRX Rifle and More! All comments are held for moderation and will appear after approval. Proper maintenance and lubrication. So the engineers lowered the feed rampa into the receiver. By the time you made it work you spent more time, money, and effort than if you just bought a new barrel or upper. [ARCHIVED THREAD] - M4 feed ramp barrel in a non M4 ramp upper. Amazing what happens in a thread over a simple question. Description Genuine 14.5" SOCOM, carbine length gas system barrel from Colt. Theres a bit more to it than just polishing. Bullets tend to bump, snag, and stub on these guns. I got my help from this thread, and thank you again to ORD. The barrel Throat is the second most critical component after angles and should be polished with utmost care. can you buy feed ramps individually? You have the option of barrel type, thread, fluting, finish type and to add a match bolt. $101.95. 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 . M4 extension with .350 M4 style feed ramps 11 Degree Target Crown Threaded Muzzle 5/8"x24 TPI Weight: 26.5 ounces 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. Rifles, Uppers, Lowers, Barrels, and more, [ARCHIVED THREAD] - Rifle vs m4 feed ramps, http://i135.photobucket.com/albums/q125/PursuitSS/Postings%20photos/c0d26170b75c3e6f9ea65a7d0862247e.jpg. All Rights Reserved. All this basically means is that the ramps continue from the barrel extension down through the upper receiver tonthe magazine. M4 feed ramps will extend the barrel extension and the upper receiver. In this episode of Gun Stock Reviews, we look at the difference between M4 Ramps and the old standard ramps of the past. The dimensions are different between the two, so theyd have to change some things to the feed ramps dimensions. Watch a video about our Modern Series AR barrel: In case My barrel is rifle ramp it won't be so bad after all. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. For instance I was looking at the BCM upper receiver, and it said it had M4 feed ramps machined into the upper. Gun smith said , not head spaced properly. I just need a little guidance on this and I'm having trouble getting good results from Google. If it's happening regularly, check the magazines you are using for serviceability. Clear editor. I suggest you get a rifle receiver. All Rights Reserved. The upper is designed to have two levels of top rails for mounting of night vision in front of scopes. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. 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. The M4 was the first (allegedy) carbine length gas system. Most of barrel assemblies and upper receivers on the market now have a present of M4 feed ramps. Try this little exercise: 1. ago KrinkyDink2 9 hr. Its not a big deal but still an important thing to remember and understand. The parts are interchangeable. What's the difference? 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. Id just get one for that barrel and find a barrel with m4 extension for the upper you already have. Bear Creek Arsenal Barrels - 6.5 Grendel Type 2 Barrel This Gorilla Machining AR-15 16" heavy Black Nitride 6.5 Grendel barrel has a Carbine length gas system with a 1:8 twist. Feedramps, proper staking of castle nuts, forward assist (yep went there)S-happens seen it. I wouldn't be concerned at all with any wear after modifying an upper receiver. 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. Please allow 5~10 days for assembly and testing before ship date. Read Now. Press J to jump to the feed. . 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. Mil-spec is good for the masses, and if you want the job done it is a great start. I too built a .458 SOCOM carbine . I didnt think anything about it having M4 feed ramps. I can still use the combination. You need to match up barrels to receivers for optimum performance. Looking to spend $180-250 (depending on condition, forge mark and if a rear sight is included or not.) Higher pressure equte to parts (bcg, buffer, buffer spring, ROUNDS, etc) experiencing much higher wear/tear. Then you can get a regular rifle barrel for the upper with no ramps. can the barrel extension be bought individualy? Not all mil-spec features advertised on the product information are the real mil-specs. FN AR-15 5.56X45mm Nato . "A Bad Day At The Range Is Better Than A Great Day Working". 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. Well, over the course of 5,000 rounds at .40 a round, you spent two grand on ammo. Absolutely nothing to do with casing diameter, or whatever other weird sht you guys imagine. colt A1E1 733 uppers didn't have extended carbine feedramps ? It has 2 ramps cut into the receiver to help the rounds feed into the chamber. 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. There's a 7 degree difference between standard and M4 ramps. However Ive built numerous ar15 and lr308 rifles and pistols. 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. I like all my guns to be reliable. Is it worth the extra 50 bucks?" M4 can better explain their benefit, although they help with more reliable feeding. Upload or insert images from URL. 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. I'd rather just pay the gunsmith to make it work than hunt down another barrel/upper if possible. JavaScript is disabled. All we do is dremmel it to match - we dont remove it and grind to any specific angle. Your discussions, feedback and comments are welcome here as long as they are relevant and insightful. He had more to say and added some more engineer and gun designer speak too. 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. This can lead to a rare but odd situation; barrel and receiver mismatch. Does it make a big difference? Barrels are Douglas 416 stainless steel with 1-7 twist with M4 feed ramps 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. Does NOT include pin Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? A4 Complete Upper Receiver. 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. All uppers are assembled cleaned and tested before shipping. so im thinking I might as well just get the unramp upper. 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. I recently built an AR9 (Glock Mags) that has been running flawlessly for about 3-400rds. Factory said its fine . 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. If you have a bolt that you would like to use you are welcome to ship it to us for accurate headspace. 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. Full M4 feed ramps start on the upper and continue onto the barrel extension. Damaged Ak front end Barrel in Trunnion with or without sight bases. 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. The M-16/M4 are great weapons. 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. LanceRiley, what does it do?? 's blog. Seems counter intuitive to recommend an M4 cut upper, especially if the barrel Im looking at has the rifle feed ramp (not M4 cut). Machined from 4150 Chrome Moly Vanadium Steel and feature a QPQ corrosion resistant finish and QPQ coated M4 feed ramp extension. M4 barrel to non M4 receiver is fine, but not the other way around. They aid in feeding the round into the chamber from the magazine more easily, which make uppers and barrel extension matched. Please be respectful of others. The M4 receiver feed ramps are cut at a steeper angle and, as a result, extend down into the receiver wall. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. So like ORD says it is entirely 100% possible and plenty of people do it, but I would rather not do any work to this perfect barrel. The barrel extension and the receiver both have to have the cuts. If you ever have an issue, then look at getting a correct barrel for the upper. Instead, I just loaded up each mag with two rounds, and pushed the rounds forward by hand until the tip of . The information provided here does not represent the views of Cheaper Than Dirt! The Fora platform includes forum software by XenForo. 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. 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. 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. Feels like a silly question now that it makes sense. The barrels also had to be modified. I recommend putting any AR-platform firearm together with a matched M4 barrel extension and upper receiver set, just because you can. Create an account to follow your favorite communities and start taking part in conversations. 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. 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. UPPER RECEIVER: AR-15 Mil-Spec Machined out of 7075-T6 Forged Aluminum, M4 Feed Ramps, Cerakoted Magpul Flat Dark Earth (FDE) Color with Forward Assist and Ejection Port Cover Installed BARREL: 22 inch, 223 Wylde Caliber, 4150 CMV, 1:7 Twist, Heavy Bull Barrel Profile, Straight Fluted, Melonite/Nitride Finish - made for us by Tactical Kinetics HAND This has been my concern with modifying the aluminum parts. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. All NFA rules apply. Would not feed to save its life! You want them to match. All things being equal and having used both weapons extensively, Id rather have the feed Ramps. I am having a tough time finding an in-stock barrel (18 or 20 incher) with a rifle extension on it. Dec 17, 2020. The ramps on the regular rifle-type extension are cut just to the edge of the extension. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. 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. M4 feed ramps are not an original design, they were designed for the M4 In fact, the . 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. i have the rifle barrel. Insert the barrel and sharpie the cut area, then use the right bit on a dremel. We want you, our readers, to be able to make informed decisions. 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. Thats an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. pictures would help. It gives a longer ramp that is less steep into the chamber. Any use of this content without express written consent is prohibited. Polishing the edges of the chamber mouth to remove the edges of that chamfer will. When I function tested it the first time with live half-jacketed rounds I had the worst FTF jam I have ever experienced.
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