Here you can see an upper with "rifle" feedramps. Its not a big deal but still an important thing to remember and understand. When you need to nail something you use a hammer not a wrench. I'm planning on replacing my forearm with a Larue 13.5. Description. I guess it depends on what your relationship to the necessary shop activities is. In most cases the ramps only help during full auto mode while cycling at a high rate. 5. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. 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? M4A1s run at 950 rounds per minute in full auto and even 950+ rounds per minute as the gas port erodes open bigger and bigger with wear and allows them to run even faster and much more violent. EDIT: Okay, I understand now! 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. The Bullet ~ Handguns, Rifles and Shotguns, http://thearguys.com/ar-facts/m4-feed-ramps/. All uppers are assembled cleaned and tested before shipping. The difference between standard feed ramps and M4 ramps is easy to see. I notice that's a Gibbz (or Gibbz-type) upper. Earlfillmore 13 hr. Absolutely nothing to do with casing diameter, or whatever other weird sht you guys imagine. again, Thanks. No feed ramps. 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. 50 bucks one way or the other on the barrel ain't squat! And that the M4s and M4A1s are issued M855 which has a slight difference in bullet shape vs. the older 55gr M193 BALL. It gives a longer ramp that is less steep into the chamber. This is a big tip, by the way, for pistol-caliber ARs. You also repeated yourself. - The Shooter's Log, 2012 SHOT Show Special Report: Del-Ton TRX Rifle and More! 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). Thats receivers, bolts, and on down the list of the 100 or so parts that can make up an AR-15. I will check with compass lake. First, the M4 barrel and non-M4 upper isnt likely to cause issues, but due to the relief cut on an M4-spec upper, there will be a gap that works like an edge that most definitely can snag the bullet and stub the round. Thanks for explaining the feed ramp topic in a couple of different ways. M16s and M16-A1s run at 750 rounds per minute in full auto. For new construction barrels only. A couple of times I ended up with the OK set up from the picture above. Notice how the ramp starts on the barrel extension and not in the receiver. 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. I would only add the feed ramps to the receiver if I had feeding issues, which you should not have. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. Feels like a silly question now that it makes sense. 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). Barrel customizations are also available. Press question mark to learn the rest of the keyboard shortcuts. I think your mistaking that with adding ramps to the receiver. All comments are held for moderation and will appear after approval. After two months of back and forth, cleaned up the feed ramps. You need to match up barrels to receivers for optimum performance. The barrel is supposed to have the M4 feed ramps. I didn't forsee that we'd ever see the day when replacement parts would be so hard to get. 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. If a barrel comes with the feed ramps could I take them off? I recently built an AR9 (Glock Mags) that has been running flawlessly for about 3-400rds. I've seen uppers with and without anodizing on M4 ramps . it seems to me to be about 50/50 with and without. The M4 ramps, if I am not mistaken, were originally made to help reduce malfunctions on the M4 carbine. Those ramps line up with the barrel, which are cut deeper than on a rifle barrel. 3. 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. Use this M4 Barrel extention with M4 feedramps. Only took a few minutes. Your link has been automatically embedded. This 20" BCM barrel is machined from SS410 stainless steel. This Kit is made to cut or polish the STEEL Feed Ramps on your Barrel Extension ONLY. Semi autos run slower than full autos. Any use of this content without express written consent is prohibited. what does it do?? A4 Complete Upper Receiver. Home Firearms Figuring Out Feed Ramps. 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. I am having a tough time finding an in-stock barrel (18 or 20 incher) with a rifle extension on it. 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. 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. M4 feed ramps. Since the M4 barrel is one and a half inches shorter than the minimum legal barrel you can install in an AR15, the M4 gas tube will be, of course, smaller. Our 6mm ARC barrel come standard with 1-7.5 Twist, M4 Feed Ramps and gas tube. Share it in the comments section. what I fear the most is having an m4 ramp upper and then getting a barrel with a rifle ramp. Press question mark to learn the rest of the keyboard shortcuts. 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. In this episode of Gun Stock Reviews, we look at the difference between M4 Ramps and the old standard ramps of the past. Would not feed to save its life! Thank you for answering the question do well. check out the. If it's happening regularly, check the magazines you are using for serviceability. By Proper maintenance and lubrication. Description Genuine 14.5" SOCOM, carbine length gas system barrel from Colt. If I have a rifle ramp upper and get the barrel later and coincidentally will have an m4 ramp. However the DD 14.5 are ideally meant to mate up with M4 style upper receiver feedramps. I just need a little guidance on this and I'm having trouble getting good results from Google. 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. 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. pm me at BOG or PG, or get in touch with my number 09177542777 if you're interested. 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. Theres a bit more to it than just polishing. 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. M4 feed ramps will extend the barrel extension and the upper receiver. 3. All things being equal and having used both weapons extensively, Id rather have the feed Ramps. Dec 17, 2020. M4 16", SBN, 1:7, 5.56 NATO Barrel Specifications: - Caliber: 5.56 NATO (.223 REM) - Gas Tube: Car Add to Cart. If you don't clean it but demand 3/4MOA you might get 1,500. Anything else you want to share about M4 clones would be appreciated, especially when it comes to a reliable rifle. I've seen several places say you just need a 1/8" chainsaw sharpening bit and a Dremel to fix it. The information provided here does not represent the views of Cheaper Than Dirt! 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. Metal cases ammunition such as Wolf through an M4 clone? It may not display this or other websites correctly. If you ever have an issue, then look at getting a correct barrel for the upper. Mil-spec is good for the masses, and if you want the job done it is a great start. You will be able to leave a comment after signing in, AR15Armory.com The angle is going to be key, alot of people attempt to mimic the angle of the barrel feed ramps, this is incorrect. Issues can arise when receivers and barrel extensions are mismatched. The M-16/M4 are great weapons. 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! practical_man 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. Shorter length equates to much higher pressure in the upper receiver. For the purposes of this chapter, we'll call the new one the M4, and the old one the AR. Will my A3 upper reciever work with my M4 barrel extention.According to some or your posts they will.Thanks Bill. Feed ramps being m4 or. While I've got everything apart, I'm thinking I just want to put an M4 barrel extension on. So, lets glide down these lines below to erase your misconceptions about them. Go slow and you'll be done in no time. LanceRiley, Thats true overall and good to keep in mind. pictures would help. I built the upper using a Mega upper with a Compass Lake 18" barrel. We have four combinations here: The extension is the part at the end of the barrel that fits inside the upper. Full M4 feed ramps start on the upper and continue onto the barrel extension. 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. instead of mil-spec. It's best to have M4 ramps on both the upper and barrel. The ramp angles are different and changing the profile of the extension doesn't make it something it isn't. I can assure you that most mods that deviate from the original design aren't 100% reliable. BUT if you find someone to grind your feed ramps and they do a good job, post it up and let us know. When carrying out feed ramp polishing, it is crucial to prioritize the frame's angles, which is a critical part of the feed ramp. Looking to spend $180-250 (depending on condition, forge mark and if a rear sight is included or not.) However Ive built numerous ar15 and lr308 rifles and pistols. A closer look at uppers and barrel extensions. You want them to match. 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. M4 Feed ramps on barrel extensions are a solid example. Ar-15 Manufacturers Should Be Avoided: Which Should You Buy? You have a rifle barrel. M4 Feed ramps on barrel extensions are a solid example. Good call. A forum community dedicated to drag racing drivers and enthusiasts. Create Account; Log Out ; Log In ; Wishlist 0; Shopping Cart 0; Home; About In general, all you need to understand is that the M4 feed ramps include the barrel extension and upper receiver. Anodized red parts. I prefer them. I got my help from this thread, and thank you again to ORD. 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. ago Costs about $40-50 to have the feed ramps reprofiled from what I can gather. 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. Also, barrel life is relative. Thread: Adding M4 feedramps to A1/C7 upper. They offer a lower, more extensive, and smoother entry for any round of ammo, whether its necessary or not. Factory said its fine . Modern Series Barrels. Please be respectful of others. The barrels also had to be modified. Go back to writing school. So I called. M4 extension with .350 M4 style feed ramps 11 Degree Target Crown Threaded Muzzle 5/8"x24 TPI Weight: 26.5 ounces which is bad combo. So, what is the difference between M4 feed ramps and regular ones? I have a non ramped barrel in a ramped upper, feeds fine. If you have an account, sign in now to post with your account. Im an old vet, now retired and looking to build some ARs as a hobby to keep me doing something that I will enjoy. 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. The best case is to have both an upper and barrel that have the feed ramps. You are using an out of date browser. http://www.ar15fornoobs.com/wp-content/uploads/feedramps.jpg. The barrel Throat is the second most critical component after angles and should be polished with utmost care. . 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. BrianEnos.com Married pretty well with my Seekins machined lower. Not saying a really good gunsmith cant do it, just that theres a bit of an involved process. Press J to jump to the feed. 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. Copyright 1996-2023 AR15.COM LLC. Both. It's near impossible to replace the carry handle upper I have these days, and finding a colt chrome lined 20" light weight barrel isn't a walk in the park either. I can probably get the upper reciever first. If your mag catch is at Spec height, you should not have a problem with an M4 cut barrel in a rifle receiver. 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. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. Not all mil-spec features advertised on the product information are the real mil-specs. I wouldn't be concerned at all with any wear after modifying an upper receiver. 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. I replaced the M4 feed ramp barrel with a monolithic feed ramp barrel and no more problems. 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. One new winner* is announced every week! Reddit and its partners use cookies and similar technologies to provide you with a better experience. This is why you can use a barrel with an extension with M4 feedramps with a receiver that does not have feedramps, but you cannot use a receiver with M4 feedramps with a barrel with an extension with rifle feedramps. Notify me of follow-up comments by email. Copyright 2016 - 2023 by AdventureFootstep.com. The manufacturer said they had sold hundreds of barrels with out problems reported. Any body need a anchor for a very small boat? AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. As a result, the factory machined M4 feed ramps on the receiver are hard coat anodized which adds significant strength to the aluminum. It's best to use rifle/rifle combo or M4/M4. Other selections are available for upper, bolt and carrier, charging handle, handguards, flash hiders, and gas blocks. i have the rifle barrel. 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. I like all my guns to be reliable. Well, over the course of 5,000 rounds at .40 a round, you spent two grand on ammo. 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. I was planning on using a Daniel Defense 14.5 pencil barrel, because like the C8 they are CHF, lightweight profile, and .750 at the FSB (And also because quality carbine pencil barrels with .625 gas blocks seem to be in short supplyor else I'd just build a 723 clone.) . 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 only one I found is LaRue's upper, but it won't work with the hand guard I'm using (Geissele MKIII). M4 feed ramps are not an original design, they were designed for the M4 In fact, the . 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). So the engineers lowered the feed rampa into the receiver. Create an account to follow your favorite communities and start taking part in conversations. Jams and misfires. 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. It's going to a gunsmith to be shortened and rethreaded anyways, can they just grind/polish the feed ramps to match or is it more involved than that? Required fields are marked *. You can put a M4 barrel and non-M4 receiver together, but you can't mismatch them the other way. No need to alter the upper. Does it make a big difference? Amazing what happens in a thread over a simple question. Higher pressure equte to parts (bcg, buffer, buffer spring, ROUNDS, etc) experiencing much higher wear/tear. You cannot paste images directly. Installing a Luth-AR Rifle Buffer Tube and an A2 Stock #1041. AAC and anybody else that has any reasonable expectation of quality and reliability use an M4 feed ramp. On AR9's, I understand the distance between the Mag Follower and the Feed Ramp is a known complication in the design. AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. 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 Gas block area is .750 diameter. Recommend using a gunsmith this route too if you are not comfortable. That puts the cartridge in a position where the extended feed ramp improves the breech-loading design. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. Everything that you have on your side to make any weapons more reliable and work when it absolutely needs to is a plus. This space is for pictures of "retro" Stoner rifles and completed or partial retro AR-15 builds, as well as discussions about either. I'll probably build a pistol out of this one. Clear editor. Some argue that, factually, its a step to enable a smoother feeding. 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. With the increased use of larger-diameter cased cartridges, the M4 feed ramps are proving their values when using them in those cartridges. I've modified barrel/receivers even before M4 cuts came out and done some receivers when the barrels had cuts.

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