is the m4 feedramp common in barrel extensions? Instead, I just loaded up each mag with two rounds, and pushed the rounds forward by hand until the tip of . Any use of this content without express written consent is prohibited. The photo shows the dents and the bolt lugs line up perfectly. I didn't forsee that we'd ever see the day when replacement parts would be so hard to get. 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 Shooter's Log, is to provide informationnot opinionsto our customers and the shooting community. AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. 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. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. It's best to use rifle/rifle combo or M4/M4. 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. I'd rather just pay the gunsmith to make it work than hunt down another barrel/upper if possible. JavaScript is disabled. Oh well, as I tell my lovely and understanding bride, guns are relatively free. it's the ammo and training that cost real money. 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. 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 gave it a longer point for the magazine to allow the rounds to come out of the magazine and feed into the chamber. I guess it depends on what your relationship to the necessary shop activities is. Higher pressure equte to parts (bcg, buffer, buffer spring, ROUNDS, etc) experiencing much higher wear/tear. So I'm working on my first build, and I'm a little confused. The closest brand new barrel you are likely to find is the Windham Weaponry 20 inch 1/7 twist chrome lined barrel. Thank you for answering the question do well. 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). There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. Only took a few minutes. The M4 style feed ramps and barrel extension provide consistent feeding and the matte black Manganese Phosphate finish resists external corrosion and oxidation. Went back to the sellers website and found I was not the only one with problems. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. This has been my concern with modifying the aluminum parts. 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. If you have an account, sign in now to post with your account. Go slow and you'll be done in no time. 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. M16's fed pretty well before the M4 feed ramps were introduced. 2. Some barrels I see for sale say they include M4 feed ramps, and some uppers say they include them too. Feedramps, proper staking of castle nuts, forward assist (yep went there)S-happens seen it. 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. Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? It has 2 ramps cut into the receiver to help the rounds feed into the chamber. The first reason is that they are, indeed, better. Interesting reading. In this episode of Gun Stock Reviews, we look at the difference between M4 Ramps and the old standard ramps of the past. Not saying a really good gunsmith cant do it, just that theres a bit of an involved process. so im thinking I might as well just get the unramp upper. I use it for hunting dogs only. Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? That puts the cartridge in a position where the extended feed ramp improves the breech-loading design. Is one better than the other? Get The Best Trigger Pull Gauges To Make Every Shot Count. Powered by Invision Community. One new winner* is announced every week! 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. Either way is good and both types work great with semi auto only guns. so it is better to have an upper reciever that's designed for non-m4 feed ramps since you can put in standard barrels right? I wouldn't be concerned at all with any wear after modifying an upper receiver. Amazing what happens in a thread over a simple question. Man, its crazy how many of yall have absolutely no idea why you do what you do. BUT, I DO NOT TRUST MY LIFE TO THAT WEAPON. 4. All Rights Reserved. Some suggest taking a grinder to the extension area. Thats receivers, bolts, and on down the list of the 100 or so parts that can make up an AR-15. M4 feed ramps. M4 Feed ramps on barrel extensions are a solid example. BrianEnos.com But, as with anything else, this work can go too far. Experts advise on 31 degrees+30 minus-zip. 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. 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. No feed ramps. If your upper isn't showing signs of bullets rubbing on the aluminum under the barrel extension, you should be good with M4 ramps. The barrel Throat is the second most critical component after angles and should be polished with utmost care. [ARCHIVED THREAD] - M4 feed ramp barrel in a non M4 ramp upper. 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. Rifles, Uppers, Lowers, Barrels, and more, [ARCHIVED THREAD] - Rifle vs m4 feed ramps, http://i135.photobucket.com/albums/q125/PursuitSS/Postings%20photos/c0d26170b75c3e6f9ea65a7d0862247e.jpg. This is a big tip, by the way, for pistol-caliber ARs. Create an account to follow your favorite communities and start taking part in conversations. Both. 3. I've been thinking about doing sort of an "Early Diemaco C8 carbine" clone build with a C7 style upper receiver. We have four combinations here: The ramp angles are different and changing the profile of the extension doesn't make it something it isn't. They aid in feeding the round into the chamber from the magazine more easily, which make uppers and barrel extension matched. Any body need a anchor for a very small boat? 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. Sorta. If I have a rifle ramp upper and get the barrel later and coincidentally will have an m4 ramp. So I called. Installing a Luth-AR Rifle Buffer Tube and an A2 Stock #1041. Snipers Hide is a community of Snipers of all kinds, focusing on long range shooting, accuracy, and ballistics. You also repeated yourself. 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. Married pretty well with my Seekins machined lower. Modern Series Barrels. They are also 1/7 twist, 4150 steel, chrome lined, and button rifled like the real deal! 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. from my service in the 70s to my personal weapons, all of my ARs are early 1970 slab sided Colt SP1s. Other selections are available for upper, bolt and carrier, charging handle, handguards, flash hiders, and gas blocks. 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. Description. Reddit and its partners use cookies and similar technologies to provide you with a better experience. What's the difference? A forum community dedicated to drag racing drivers and enthusiasts. -The Barrel MUST be removed from the Upper Receiver in order to use this Kit.-Never cut or polish the aluminum M4 Feed Ramps in your upper receiver! Site towers are not "F" marked SPECS: Length- 14.5". If you aren't 110% comfortable with doing the job, and you do not have all the tools and equipment to do it properly, then have a smith do it for you. 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. As they are becoming more and more a standard, and certainly do not do any harm to us. Issues can arise when receivers and barrel extensions are mismatched. Not all mil-spec features advertised on the product information are the real mil-specs. 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. Please be respectful of others. i have an extra brand new M4 barrel extension ramp to replace a rifle ramp. M4 extension with .350 M4 style feed ramps 11 Degree Target Crown Threaded Muzzle 5/8"x24 TPI Weight: 26.5 ounces Factory said its fine . It may not display this or other websites correctly. Is it worth the extra 50 bucks?" 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. Product Details Douglas 18" Flat Dark Earth Cerakoted 416 stainless steel barrel with 1-7 twist and M4 feed ramps. 410 stainless is also harder and more corrosion resistant than conventional 416 stainless found in other commercially available precision barrels. 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. When I function tested it the first time with live half-jacketed rounds I had the worst FTF jam I have ever experienced. All comments are held for moderation and will appear after approval. 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. Full M4 feed ramps start on the upper and continue onto the barrel extension. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. pictures would help. Notify me of follow-up comments by email. There are several, but Steve and the guys at ADCO in OH are one such option (they use the Dremel method, but they do it right as I have seen several first-hand examples of their work and its performance after the fact). Display as a link instead, Costs about $40-50 to have the feed ramps reprofiled from what I can gather. 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. 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. The M4 receiver feed ramps are cut at a steeper angle and, as a result, extend down into the receiver wall. Copyright 1996-2023 AR15.COM LLC. Being a Newbie AR owner ((Ive been an avid gun owner for nearly 50 years), I appreciate the information and visual aids that Im sure will be a big help in enjoying and using this gun platform. This USGI modification was done to both the barrel extension and the upper receiver, creating a longer and steeper feed ramp. pm me at BOG or PG, or get in touch with my number 09177542777 if you're interested. 3. I'm a machinist in the aerospace industry and lucky enough to have. I checked what I have now. If this is your first visit, be sure to The upper is designed to have two levels of top rails for mounting of night vision in front of scopes. Feed ramps on barrel extensions are a good example. Barrel Length: 16" Barrel Material: 4150V Chrome Moly Vanadium Steel Barrel Finish: Phosphate Barrel Profile: M4 Chamber: 5.56 NATO Twist Rate: 1 in 7" Extension: M4 Gas System: Carbine-Length Gas Block Type: Low Profile .750" Diameter Upper Receiver: Forged 7075 T6 Aluminum Receiver Style: M4 Flat top with feed ramps Receiver Finish: Hardcoat Anodized This space is for pictures of "retro" Stoner rifles and completed or partial retro AR-15 builds, as well as discussions about either. The M4 ramps, if I am not mistaken, were originally made to help reduce malfunctions on the M4 carbine. I just need a little guidance on this and I'm having trouble getting good results from Google. There's a 7 degree difference between standard and M4 ramps. Notice how the ramp starts on the barrel extension and not in the receiver. Ok, So, in short, I've got a barrel on my Armalite upper (with M4 feed ramps in the upper) that has standard AR-15 (non-M4) ramps. 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. . Forged 7075-T6 aluminum is harder than a bulls balls. Can I use a barrel with M4 feed ramps with an upper that isnt M4 matched? You have the option of barrel type, thread, fluting, finish type and to add a match bolt. In general, all you need to understand is that the M4 feed ramps include the barrel extension and upper receiver. Recommend using a gunsmith this route too if you are not comfortable. 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 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. Thats why AR10s- And Scar heavies exist for. For a better experience, please enable JavaScript in your browser before proceeding. Seems counter intuitive to recommend an M4 cut upper, especially if the barrel Im looking at has the rifle feed ramp (not M4 cut). 1 is a standard and the other for use with m4 feed ramp barrels. JavaScript is disabled. Buy AR 15 16" .350 Legend Nitride M4 Profile Barrel 1:16: GunBroker is the largest seller of AR15 Parts Gun Parts All: 974000728 . Change the angle so that the ramp ends at the exact same point. Its not a big deal but still an important thing to remember and understand. Barrel customizations are also available. Gun smith said , not head spaced properly. If I can correct an issue before it's an issue that is preferred. - The Shooter's Log, 2012 SHOT Show Special Report: Daniel Defense DDM4 V5 in .300 Blackout and a Factory SBR - The Shooter's Log, 2012 SHOT Show Special Report: SOG Armory Predator Rifle - The Shooter's Log, Surefire's 100-Round MAG5-100: The Highest Capacity AR-15 Magazine - The Shooter's Log, Throwback Thursday: Taurus Judge Range Report, ATI Milsport SGA 410 All the Advantages of an AR in .410, Ruger SR1911 LW Commander The Lightweight .45 ACP, Rifle Hack: Sighting for 100 Yards at a Distance of 25 Yards, Throwback Thursday: All About Bullet Grain. You must log in or register to reply here. 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. 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. A couple of times I ended up with the OK set up from the picture above.

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