I should have taken my own advice for once. 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. It may not display this or other websites correctly. Adding M4 feedramps to A1/C7 upper - M4Carbine.net M4 Feed ramps on barrel extensions are a solid example. Any use of this content without express written consent is prohibited. Do you need an M4 feed ramp on your AR? Here is some info. 11.5", SBN, 1:7, 5.56 NATO Barrel So, what is the difference between M4 feed ramps and regular ones? The extension is the part at the end of the barrel that fits inside the upper. Gun smith said , not head spaced properly. I can assure you that most mods that deviate from the original design aren't 100% reliable. Here you can see an upper with "rifle" feedramps. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Instead, I just loaded up each mag with two rounds, and pushed the rounds forward by hand until the tip of . Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. Backing up a ton: Any and all AR-15 barrel extensions have feed ramps. So the engineers lowered the feed rampa into the receiver. m4 feed ramps - The Armorer - AR15Armory.com Ar15 Upper receivers A2 and Colt A1, M4 and - Northwest Firearms Barrel customizations are also available. A forum community dedicated to drag racing drivers and enthusiasts. 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. 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. 5. Thats an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. Man, its crazy how many of yall have absolutely no idea why you do what you do. This gave it a longer point for the magazine to allow the rounds to come out of the magazine and feed into the chamber. AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. Somwhere in the 1990s I believe, Colt designed the M4 feed ramps, where they took some of the material out of the upper receiver, cut two little ramps in it and then cut the ramps in the barrel extention a little further forward. In case My barrel is rifle ramp it won't be so bad after all. I have looked and looked and looked. It is milled out of 6061 T6. 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. M16s and M16-A1s run at 750 rounds per minute in full auto. For this test, I used a Colt upper with M4 feed ramps and a SOCOM heavy 14.5 barrel, just like what is used in the military. Description. 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. Share it in the comments section. practical_man Went back to the sellers website and found I was not the only one with problems. instead of mil-spec. The best case is to have both an upper and barrel that have the feed ramps. After two months of back and forth, cleaned up the feed ramps. 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. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. 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. 50 bucks one way or the other on the barrel ain't squat! Clear editor. A feed ramp is a basic feature of many breech loading cartridge firearm designs. The best case is to have both an upper and barrel that have the feed ramps. ago Costs about $40-50 to have the feed ramps reprofiled from what I can gather. Previous. Metal cases ammunition such as Wolf through an M4 clone? Add M4 cuts to Barrel Ext $15.00 We can modify your rifle extension to match the M4 cuts in an upper receiver. Amazing what happens in a thread over a simple question. All Rights Reserved. Figuring Out Feed Ramps | Feed Ramp Tips | The Shooter's Log I'm a machinist in the aerospace industry and lucky enough to have. Brevity matters. I'm lookin for a clear definition as to what they are, and what they do to enhance a given rifle's performance? I prefer them. Notify me of follow-up comments by email. Reddit and its partners use cookies and similar technologies to provide you with a better experience. As suggested, its best to match the upper and barrel extension no worries that way. Your email address will not be published. 410 stainless is also harder and more corrosion resistant than conventional 416 stainless found in other commercially available precision barrels. There is no way to make a carbine barrel extension out of a rifle barrel extension, period, full stop. The A2's are pretty reliable guns, but trashed mags can cause them to have malfunctions also. PRI MK 12 Mod H 16" 223/5.56 Upper w/ 1-7 twist They are better! Full M4 feed ramps start on the upper and continue onto the barrel extension. M16's fed pretty well before the M4 feed ramps were introduced. Please allow 5~10 days for assembly and testing before ship date. M4 feed ramp barrel in a non M4 ramp upper - AR15.COM 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). 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. 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. I would just make sure to order rifle upper with rifle barrel extension or M4 upper with M4 barrel extension. My alternative plan is to do exactly as you describe. Most work performed while-you-wait, evening and saturday appointments available. 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. I had seen these pix years ago and dismissed the idea of mix and match. Press J to jump to the feed. I cant advise on that one folks. The ramps on the regular rifle-type extension are cut just to the edge of the extension. If a barrel comes with the feed ramps could I take them off? I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. Change the angle so that the ramp ends at the exact same point. In general, all you need to understand is that the M4 feed ramps include the barrel extension and upper receiver. 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. How to Clone the M16A2 Rifle - The New Rifleman The information provided here does not represent the views of Cheaper Than Dirt! Just put it in and shoot it. I have a 723 build (w/ C7 upper) and a 727 build (A2 upper) that use 14.5" Colt M4 barrels. In this episode of Gun Stock Reviews, we look at the difference between M4 Ramps and the old standard ramps of the past. Founded by Frank Galli in 2000, Snipers Hide has been offering informational videos, podcasts, and other support to its users in one location. 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. However Ive built numerous ar15 and lr308 rifles and pistols. 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. I'm planning on replacing my forearm with a Larue 13.5. M4 ramps help in feeding in for carbine in full auto. You can post now and register later. Seems like it should work to me, but be a real challenge to keep clean and be damned ugly to boot. Seems counter intuitive to recommend an M4 cut upper, especially if the barrel Im looking at has the rifle feed ramp (not M4 cut). When carrying out feed ramp polishing, it is crucial to prioritize the frame's angles, which is a critical part of the feed ramp. Everything that you have on your side to make any weapons more reliable and work when it absolutely needs to is a plus. In most cases the ramps only help during full auto mode while cycling at a high rate. Hasn't misfed yet, through initial break in up through 1k rounds, and that's mag length ammo. Feed ramp - Wikipedia hey bro nice to see you here!!! That is what I tell people when they try to convince me that they need a stainless barrel instead of chrome-moly. The M4 receiver feed ramps are cut at a steeper angle and, as a result, extend down into the receiver wall. 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. Bullets tend to bump, snag, and stub on these guns. 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! 30 cal. This is one time it's better to go a little too far than to leave an edge for the . I recently built an AR9 (Glock Mags) that has been running flawlessly for about 3-400rds. By Product Description Surplus Colt 14.5" SOCOM, carbine length gas system barrel from Colt. AR9 - Help diagnosing feeding issue. 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. Then you can get a regular rifle barrel for the upper with no ramps. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. These Mil-Spec M4 feed ramps are part of the original CNC manufacturing process. Good call. 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. Get The Best Trigger Pull Gauges To Make Every Shot Count. So I called. The barrel Throat is the second most critical component after angles and should be polished with utmost care. 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. It's best to use rifle/rifle combo or M4/M4. Cutting M4 feed ramps - Calguns.net All uppers are assembled cleaned and tested before shipping. Its a miracle! Oh well, as I tell my lovely and understanding bride, guns are relatively free. it's the ammo and training that cost real money. All Rights Reserved. Description Genuine 14.5" SOCOM, carbine length gas system barrel from Colt. Getting the AR Barrel and Receiver Configuration Correct if you are OK with 3MOA, you might go 20,000 rounds! Factory said its fine . Mil-spec is good for the masses, and if you want the job done it is a great start. 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. Douglas 5.56 Stainless Steel Barrel 18" - 1~7 twist 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. M4 feed ramps are not an original design, they were designed for the M4 In fact, the . Barrel FAQs | Ballistic Advantage can the barrel extension be bought individualy? RTS Bartlein: 6mm ARC 26" - Compass Lake Engineering, LLC By Yamil Sued August 6, 2021. An older-version (or A2-style) feed ramp is cut only on the barrel extension itself (top). Is getting it as part of the upper better? Ballistic Performance of Federal Punch .22 LR Ammunition with the Heritage Barkeep #1063. This Kit is made to cut or polish the STEEL Feed Ramps on your Barrel Extension ONLY. http://www.ar15fornoobs.com/wp-content/uploads/feedramps.jpg. Higher pressure equte to parts (bcg, buffer, buffer spring, ROUNDS, etc) experiencing much higher wear/tear. May 17, 2008 in The Armorer. You also repeated yourself. Theres a bit more to it than just polishing. I don't have much to add re: feed ramps, but.

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