Hasn't misfed yet, through initial break in up through 1k rounds, and that's mag length ammo. M4 ramps help in feeding in for carbine in full auto. 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. A4 Complete Upper Receiver - 7075 Forged A4 Flat Top Upper Receiver - M4 Feed Ramps Includes: - Add to Cart. Editors Note: This article was originally published in January of 2019. Jams and misfires. You cannot paste images directly. When you need to nail something you use a hammer not a wrench. 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. 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 . 338 and others not the .308 76251 or 6.5 creedmore which o think should have a.30cal feed ramp.? Go back to writing school. Theres a bit more to it than just polishing. It has ran flawlessly (barring tuning of the gasblock when new) with several different brands of magazines and ammo. The ramps are in the barrel extension. I can assure you that most mods that deviate from the original design aren't 100% reliable. Olympic Arms Upper receiver with rear sight assembly and forward assist and dust cover has M4 feed ramps $260 View attachment 1016575 View attachment 1016576 Avoid Polishing Too Lightly Or Too Roughly You need to match up barrels to receivers for optimum performance. You will be able to leave a comment after signing in, AR15Armory.com And that the M4s and M4A1s are issued M855 which has a slight difference in bullet shape vs. the older 55gr M193 BALL. Dec 17, 2020. 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. There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. The M-16/M4 are great weapons. 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. You want them to match. That is what I tell people when they try to convince me that they need a stainless barrel instead of chrome-moly. They offer a lower, more extensive, and smoother entry for any round of ammo, whether its necessary or not. No need to alter the upper. Thanks. For the purposes of this chapter, we'll call the new one the M4, and the old one the AR. 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. They aid in feeding the round into the chamber from the magazine more easily, which make uppers and barrel extension matched. However the DD 14.5 are ideally meant to mate up with M4 style upper receiver feedramps. The only other time it seems to help is if the mag is feeding the rounds with the bullet slightly angled lower than normal. The ramps on the regular rifle-type extension are cut just to the edge of the extension. Full M4 feed ramps are on both the upper and barrel extension. Not all mil-spec features advertised on the product information are the real mil-specs. Description. 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. I should have taken my own advice for once. Should not be too hard. It has 2 ramps cut into the receiver to help the rounds feed into the chamber. 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. My experience with ARs is all A-1s. But, as with anything else, this work can go too far. Insert the barrel and sharpie the cut area, then use the right bit on a dremel. It's best to use rifle/rifle combo or M4/M4. I put together a second AR9 that is having a feeding issue, even if using similar parts as the first one. 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. What is an m4 feed ramp? 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. All comments are held for moderation and will appear after approval. If you ever have an issue, then look at getting a correct barrel for the upper. *Must have a registered ARFCOM account to win. 1 is a standard and the other for use with m4 feed ramp barrels. 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 If your upper isn't showing signs of bullets rubbing on the aluminum under the barrel extension, you should be good with M4 ramps. Thats why AR10s- And Scar heavies exist for. Either way is good and both types work great with semi auto only guns. Whether they materialize or not depends on the direction of the mismatch. Everything that you have on your side to make any weapons more reliable and work when it absolutely needs to is a plus. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. So, an M4 feed ramp includes the barrel extension and the upper. The manufacturer said they had sold hundreds of barrels with out problems reported. 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). For a better experience, please enable JavaScript in your browser before proceeding. I wouldn't be concerned at all with any wear after modifying an upper receiver. I've modified barrel/receivers even before M4 cuts came out and done some receivers when the barrels had cuts. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. 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. Seems counter intuitive to recommend an M4 cut upper, especially if the barrel Im looking at has the rifle feed ramp (not M4 cut). For use by barrel manufacturers. While I've got everything apart, I'm thinking I just want to put an M4 barrel extension on. can the barrel extension be bought individualy? 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. upper recievers and barrels are hard to comeby. Any use of this content without express written consent is prohibited. 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. Little polish. This gave it a longer point for the magazine to allow the rounds to come out of the magazine and feed into the chamber. Anodized red parts. Required fields are marked *. Went back to the sellers website and found I was not the only one with problems. 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. Clear editor. Some, me included, have said that the M4 ramps are a help to some of the larger-diameter cartridges in use, such as 6.5 Grendel or .22 Nosler. Does NOT include pin I have done the same, protect the Barrel extension with a layer of electrical tape and carefully file or Dremel the ramps into the aluminum receiver. Oh well, as I tell my lovely and understanding bride, guns are relatively free. it's the ammo and training that cost real money. 3. Amazing what happens in a thread over a simple question. I don't quite trust myself to give it a go, but if that's all there is to it I'm hoping they can do it for a reasonable price. Is it worth the extra 50 bucks?" That's an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. In general, all you need to understand is that the M4 feed ramps include the barrel extension and upper receiver. - 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. Barrel, sight and trigger work on most pistols and shotguns. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. Only took a few minutes. Paste as plain text instead, 2. So I called. With the increased use of larger-diameter cased cartridges, the M4 feed ramps are proving their values when using them in those cartridges. You must log in or register to reply here. Your email address will not be published. colt A1E1 733 uppers didn't have extended carbine feedramps ? All we do is dremmel it to match - we dont remove it and grind to any specific angle. Get The Best Trigger Pull Gauges To Make Every Shot Count. I use it for hunting dogs only. Add M4 cuts to Barrel Ext $15.00 We can modify your rifle extension to match the M4 cuts in an upper receiver. Product Details Douglas 18" Flat Dark Earth Cerakoted 416 stainless steel barrel with 1-7 twist and M4 feed ramps. 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. DSA has fat top, Mueller, non feed ramp uppers for $40. You have the option of barrel type, thread, fluting, finish type and to add a match bolt. They are better! I have a non ramped barrel in a ramped upper, feeds fine. Bullets tend to bump, snag, and stub on these guns. Feeds flawlessly. Create an account to follow your favorite communities and start taking part in conversations. You have a rifle barrel. I'm lookin for a clear definition as to what they are, and what they do to enhance a given rifle's performance? So there's a lot more going on with rounds bouncing up and down in the mags etc. Its easier to add feed ramps to the receiver not so easy to add them to the barrel extension. So, lets glide down these lines below to erase your misconceptions about them. 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. So I'm working on my first build, and I'm a little confused. Earlfillmore 13 hr. Thank you for answering the question do well. You are using an out of date browser. One of the AR15 engineers under Gene Stoner pretty much said that the M4 isn't a good platform, especially once the gas port erodes a bit. Go slow and you'll be done in no time. 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. Machined from 4150 Chrome Moly Vanadium Steel and feature a QPQ corrosion resistant finish and QPQ coated M4 feed ramp extension. All Rights Reserved. Thanks! Gun smith said , not head spaced properly. EDIT: Okay, I understand now! http://www.ar15fornoobs.com/wp-content/uploads/feedramps.jpg. 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 . Only took a few minutes. 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. I have looked and looked and looked. instead of mil-spec. One new winner* is announced every week! from my service in the 70s to my personal weapons, all of my ARs are early 1970 slab sided Colt SP1s. 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. Ideally both. Check often for fit. check out the. Please be respectful of others. 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. 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). M16's fed pretty well before the M4 feed ramps were introduced. All things being equal and having used both weapons extensively, Id rather have the feed Ramps. Gas block area is .750 diameter. And that is the important thing! Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? By Some barrels I see for sale say they include M4 feed ramps, and some uppers say they include them too. Your link has been automatically embedded. If your magazines are set up correctly, and the feed lip edges polished smooth, each round fed from the magazine will go directly into the chamber. 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. Again, youll find plenty of videos on spooling up hand grinders to remedy feed ramp and ejection port issues with these larger cartridges, but I strongly suggest going factory-done aftermarket. 50 bucks one way or the other on the barrel ain't squat! They were not intended to be super long range man killers. The best case is to have both an upper and barrel that have the feed ramps. pm me at BOG or PG, or get in touch with my number 09177542777 if you're interested. You need to match up barrels to receivers for optimum performance. The angle is going to be key, alot of people attempt to mimic the angle of the barrel feed ramps, this is incorrect. Supposedly you'll only notice issues with rapid/auto fire with a configuration like this. The M4, and the CAR-15, before it have had similar problems like the ones you mentioned. 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. I would only add the feed ramps to the receiver if I had feeding issues, which you should not have. There is a picture of the various options, hopefully another poster can link them. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. Our 6.5 Grendel Black Nitride rifle barrels are made from the finest 4150 Chrome Moly Vanadium and precisely rifled for high accuracy at a great price. Any body need a anchor for a very small boat? this is the barrel designed and profiled for the Mark 12 Mod 0 uppers and rifles. 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? Remember less is more, little by little. Create an account to follow your favorite communities and start taking part in conversations. We reserve the right to edit as appropriate, delete profane, harassing, abusive and spam comments or posts, and block repeat offenders. Is one better than the other? BUT, I DO NOT TRUST MY LIFE TO THAT WEAPON. A forum community dedicated to drag racing drivers and enthusiasts. If you have an account, sign in now to post with your account. Good call. Snipers Hide is a community of Snipers of all kinds, focusing on long range shooting, accuracy, and ballistics. 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. M4 Feed ramps on barrel extensions are a solid example. practical_man 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 All uppers are assembled cleaned and tested before shipping. The closest brand new barrel you are likely to find is the Windham Weaponry 20 inch 1/7 twist chrome lined barrel. if you are OK with 3MOA, you might go 20,000 rounds! 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. As they are becoming more and more a standard, and certainly do not do any harm to us. The barrel blanks available are made from 416 Stainless Steel. I've been thinking about doing sort of an "Early Diemaco C8 carbine" clone build with a C7 style upper receiver. Seems like it should work to me, but be a real challenge to keep clean and be damned ugly to boot. Interesting reading. If I have a rifle ramp upper and get the barrel later and coincidentally will have an m4 ramp. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. Feels like a silly question now that it makes sense. I didn't forsee that we'd ever see the day when replacement parts would be so hard to get. 2. The barrel extension and the receiver both have to have the cuts. JavaScript is disabled. Then the manufacturer discontinued the barrel. This is one time it's better to go a little too far than to leave an edge for the . aaargh.. that's the setup I hate to see. However Ive built numerous ar15 and lr308 rifles and pistols. 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? Proper maintenance and lubrication. So, I had purchased a 458 upper. I've seen that pic, it is a good reference. By To conclude, the M4 feed ramps bring a lot of improvements to the AR-platform firearms. 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. If a barrel comes with the feed ramps could I take them off? Related: If you are using a Ar rifle, best green laser sight is good choice for hunting. The best case is to have both an upper and barrel that have the feed ramps. M4 extension with .350 M4 style feed ramps 11 Degree Target Crown Threaded Muzzle 5/8"x24 TPI Weight: 26.5 ounces AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. Also, barrel life is relative. Not saying a really good gunsmith cant do it, just that theres a bit of an involved process. FN AR-15 5.56X45mm Nato . This Kit is made to cut or polish the STEEL Feed Ramps on your Barrel Extension ONLY. 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. The M4 was the first (allegedy) carbine length gas system. Copyright 1996-2023 AR15.COM LLC. Experts advise on 31 degrees+30 minus-zip. . Reddit and its partners use cookies and similar technologies to provide you with a better experience. 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. Which Model Colt 1911 is For Me? Ar-15 Manufacturers Should Be Avoided: Which Should You Buy? It's an interesting question. Your discussions, feedback and comments are welcome here as long as they are relevant and insightful. is the m4 feedramp common in barrel extensions? i have the rifle barrel. The Bullet ~ Handguns, Rifles and Shotguns, http://thearguys.com/ar-facts/m4-feed-ramps/. Installing a Luth-AR Rifle Buffer Tube and an A2 Stock #1041. This space is for pictures of "retro" Stoner rifles and completed or partial retro AR-15 builds, as well as discussions about either. I built the upper using a Mega upper with a Compass Lake 18" barrel. Damaged Ak front end Barrel in Trunnion with or without sight bases. The Fora platform includes forum software by XenForo. 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. Feed ramps being m4 or. If it's happening regularly, check the magazines you are using for serviceability. . Press J to jump to the feed. M4 barrel to non M4 receiver is fine, but not the other way around. 308 m5 using m4 feed ramps, which I belive are for the smaller round like. I didnt think anything about it having M4 feed ramps. M4 can better explain their benefit, although they help with more reliable feeding. If you consider this article useful, share it with anyone in need! 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. That puts the cartridge in a position where the extended feed ramp improves the breech-loading design. Notice how the ramp starts on the barrel extension and not in the receiver. The barrel Throat is the second most critical component after angles and should be polished with utmost care. Create Account; Log Out ; Log In ; Wishlist 0; Shopping Cart 0; Home; About 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. 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. For instance I was looking at the BCM upper receiver, and it said it had M4 feed ramps machined into the upper. Was sort of worried about how it would run with an 11.5" barrel and mismatched ramps, but it sounds like it should be good to go either way. 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 (theyre lowered). Don't ever put non M4 ramped barrel on a M4 ramped upper receiver. I like all my guns to be reliable. Your previous content has been restored. Then you can get a regular rifle barrel for the upper with no 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. Does anyone have a follow up that confirms or denies my claim? 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. Seems M4 is all the rage these days.
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