I recently built an AR9 (Glock Mags) that has been running flawlessly for about 3-400rds. ago Costs about $40-50 to have the feed ramps reprofiled from what I can gather. In general, all you need to understand is that the M4 feed ramps include the barrel extension and upper receiver. 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. I recommend putting any AR-platform firearm together with a matched M4 barrel extension and upper receiver set, just because you can. I didn't forsee that we'd ever see the day when replacement parts would be so hard to get. BCM 14.5" MK2 Upper (Standard) w/ 13" MLOK Handguard - FDE I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. Not all mil-spec features advertised on the product information are the real mil-specs. I'm lookin for a clear definition as to what they are, and what they do to enhance a given rifle's performance? On AR9's, I understand the distance between the Mag Follower and the Feed Ramp is a known complication in the design. 4. this is the barrel designed and profiled for the Mark 12 Mod 0 uppers and rifles. The barrel is supposed to have the M4 feed ramps. 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. Thank you for answering the question do well. 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. 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. 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. M4-style barrel extension with Rifle-type upper - Rifle - Technical 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. 16" Pre-Ban M4 Profile Barrel Assembly CARBINE Gas System About Upper assembly comes completely head spaced and test fired. M16's fed pretty well before the M4 feed ramps were introduced. BUT, I DO NOT TRUST MY LIFE TO THAT WEAPON. 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? 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. 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. Looking for a black stripped A1 upper with non m4 feed ramps (just realized the upper I have wont work with my barrel). 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 upper is designed to have two levels of top rails for mounting of night vision in front of scopes. The last is using the best and right ammo for the job. Feed ramp - Wikipedia All uppers are assembled cleaned and tested before shipping. To conclude, the M4 feed ramps bring a lot of improvements to the AR-platform firearms. How to Clone the M16A2 Rifle - The New Rifleman 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 Semi autos run slower than full autos. well.. it's kinda hard to get stuff in this part of the world. 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 They were not intended to be super long range man killers. Damaged Ak front end Barrel in Trunnion with or without sight bases. You are using an out of date browser. Press J to jump to the feed. Supposedly you'll only notice issues with rapid/auto fire with a configuration like this. I have a 723 build (w/ C7 upper) and a 727 build (A2 upper) that use 14.5" Colt M4 barrels. Powered by Invision Community, M4-style barrel extension with Rifle-type upper. Avoid Polishing Too Lightly Or Too Roughly Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? Married pretty well with my Seekins machined lower. Either way is good and both types work great with semi auto only guns. Barrel, sight and trigger work on most pistols and shotguns. 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. Press question mark to learn the rest of the keyboard shortcuts. Those ramps line up with the barrel, which are cut deeper than on a rifle barrel. 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). Snipers Hide is a community of Snipers of all kinds, focusing on long range shooting, accuracy, and ballistics. While I've got everything apart, I'm thinking I just want to put an M4 barrel extension on. Forged 7075-T6 aluminum is harder than a bulls balls. Guess what? PSA PA-15 16"M4 Phosphate 5.56 NATO 1/7 Classic AR-15 Rifle with 13.5"M 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. Proper maintenance and lubrication. Douglas 5.56 Stainless Steel Barrel 18" - 1~7 twist For a better experience, please enable JavaScript in your browser before proceeding. 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. Your previous content has been restored. The extension is the part at the end of the barrel that fits inside the upper. I will attest that a rifle upper and a barrel with the M4 feedramps works just fine. Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? Experts advise on 31 degrees+30 minus-zip. Reddit and its partners use cookies and similar technologies to provide you with a better experience. It's an interesting question. 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. Does NOT include pin Get The Best Trigger Pull Gauges To Make Every Shot Count. Installing a Luth-AR Rifle Buffer Tube and an A2 Stock #1041. For instance I was looking at the BCM upper receiver, and it said it had M4 feed ramps machined into the upper. The best case is to have both an upper and barrel that have the feed ramps. 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 Costs about $40-50 to have the feed ramps reprofiled from what I can gather. America's Ultimate Shooting Sports Discounter, Click to share on Facebook (Opens in new window), Click to share on Twitter (Opens in new window), Click to share on Pinterest (Opens in new window). 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. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. P2A PATRIOT 22" 223 Wylde 1/7 Rifle Length Melonite Fluted Heavy Bull 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. Rear side of a CZ-75B pistol barrel showing the (here dirty) feed ramp. Sorta. After two months of back and forth, cleaned up the feed ramps. I'm assuming that you only need the ramps from one or the other. Does anyone have a follow up that confirms or denies my claim? and add them to non-m4 barrels.? This has been my concern with modifying the aluminum parts. 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. colt A1E1 733 uppers didn't have extended carbine feedramps ? Copyright 2016 - 2023 by AdventureFootstep.com. True, which is why they're not even needed in semi autos. 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Should not be too hard. 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. Thanks for explaining the feed ramp topic in a couple of different ways. Your discussions, feedback and comments are welcome here as long as they are relevant and insightful. Feels like a silly question now that it makes sense. Higher pressure equte to parts (bcg, buffer, buffer spring, ROUNDS, etc) experiencing much higher wear/tear. 308 m5 using m4 feed ramps, which I belive are for the smaller round like. I guess it depends on what your relationship to the necessary shop activities is. They are also 1/7 twist, 4150 steel, chrome lined, and button rifled like the real deal! If you consider this article useful, share it with anyone in need! Some argue that, factually, its a step to enable a smoother feeding. Do you have an AR barrel or feed ramp tip? AR15 20 inch Upper Receiver Group (SS) w/ Handguard | BCM 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. How to Polish a Feedramp Quick and Easy | Firearms Talk Watch a video about our Modern Series AR barrel: Konza Defender M-LOK 5.56 16" Rifle 1x7 FEATURES: 16" 4150 Nitride 1x7 5.56 Barrel T-Marked Upper with M4 Feed Ramps Steel Micro Gas Block, and Carbine Length Gas Tube 15" 7075 T6 Aluminum Free Float M-LOK Hand Guard A2 Muzzle Break BCG is an M16 Style Nitride QPQ Finish Charging Handle Mil-Spec 6 Position Mil-Spec Diameter Stock Can I use a barrel with M4 feed ramps with an upper that isnt M4 matched? AAC and anybody else that has any reasonable expectation of quality and reliability use an M4 feed ramp. The good idea is that the round, presented at a lower plane, will contact other lower feed ramps and go right on in. You need to match up barrels to receivers for optimum performance. When I function tested it the first time with live half-jacketed rounds I had the worst FTF jam I have ever experienced. Ar15 Upper receivers A2 and Colt A1, M4 and - Northwest Firearms 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 . FFL Fax: 866-721-8691. They provide a lower, wider, and smoother entry for any round of ammo, whether its necessary or not. Looking For Bear Creek Arsenal Barrels Review? Try this little exercise: 1. 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. 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. We have four combinations here: 338 and others not the .308 76251 or 6.5 creedmore which o think should have a.30cal feed ramp.? No need to alter the upper. Getting the AR Barrel and Receiver Configuration Correct Here you can see an upper with "rifle" feedramps. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. 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. I'll probably build a pistol out of this one. The first reason is that they are, indeed, better. As a result, the factory machined M4 feed ramps on the receiver are hard coat anodized which adds significant strength to the aluminum. Full M4 feed ramps are on both the upper and barrel extension. As suggested, its best to match the upper and barrel extension no worries that way. Some gun owners believe that the M4 ramps can help for some of the larger-diameter cartridges in use. A closer look at uppers and barrel extensions. That's an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. Check often for fit. Im an old vet, now retired and looking to build some ARs as a hobby to keep me doing something that I will enjoy. I prefer them. 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. There is a picture of the various options, hopefully another poster can link them. I can assure you that most mods that deviate from the original design aren't 100% reliable. AR15 Feed Ramp Cut & Polish Kit - School of the American Rifle So I'm working on my first build, and I'm a little confused. I can probably get the upper reciever first. My experience with ARs is all A-1s. Upper Receiver WITHOUT M4 Feed Ramp Cuts? - Sniper's Hide Forum 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. 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. I've modified barrel/receivers even before M4 cuts came out and done some receivers when the barrels had cuts. Copyright 1996-2023 AR15.COM LLC. An older-version (or A2-style) feed ramp is cut only on the barrel extension itself (top). Notify me of follow-up comments by email. Any body need a anchor for a very small boat? Its highly recommended to put any AR-platform firearm together with a matching M4 barrel extension and upper receiver set. M16s and M16-A1s run at 750 rounds per minute in full auto. 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). It is removeable with a special wrench and a barrel clamp/vise. AR Tech Tip - Checking M4 Ramps for overhang - YouTube Reliability is the main concern for me when I re-barrel this rifle. I can still use the combination. [WTB] Black A1 carry handle upper NON-m4 feed ramp $200 You cannot paste images directly. I didnt think anything about it having M4 feed ramps. 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. . Featuring hand lapped 1/8 twist rate button rifling and M4 feed ramps barrel extensions, the 410 stainless barrel gives the shooter the best balance of weight and accuracy. You want them to match. Then the manufacturer discontinued the barrel. How long your barrel "lasts" depends on what your accuracy threshold is before you decide it is too bad to keep using. So, an M4 feed ramp includes the barrel extension and the upper. m4 feed ramps - The Armorer - AR15Armory.com 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 notice that's a Gibbz (or Gibbz-type) upper. pictures would help. In case My barrel is rifle ramp it won't be so bad after all. 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. Questions on how to install your new BA barrel? You can put a M4 barrel and non-M4 receiver together, but you can't mismatch them the other way. Everything that you have on your side to make any weapons more reliable and work when it absolutely needs to is a plus. We want you, our readers, to be able to make informed decisions. I am having a tough time finding an in-stock barrel (18 or 20 incher) with a rifle extension on it. I replaced the M4 feed ramp barrel with a monolithic feed ramp barrel and no more problems. Just because you can, doesn't mean you should. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. DoubleStar M4 clone opinions | Survivalist Forum You must log in or register to reply here. 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. The Mission of Cheaper Than Dirt! All comments are held for moderation and will appear after approval. Then you can get a regular rifle barrel for the upper with no ramps. If I have a rifle ramp upper and get the barrel later and coincidentally will have an m4 ramp. One new winner* is announced every week! Any use of this content without express written consent is prohibited. Del-Ton, Inc. AR-15 16" M4 Custom Upper Figuring Out Feed Ramps | Feed Ramp Tips | The Shooter's Log I read in Bravo company that there are 2 kinds of flat top upper. What's the difference? BUT if you find someone to grind your feed ramps and they do a good job, post it up and let us know. Barrel FAQs | Ballistic Advantage Surplus Colt 14.5 M4 SOCOM Carbine Barrel 1/7 Twist All things being equal and having used both weapons extensively, Id rather have the feed Ramps. A4 Complete Upper Receiver - 7075 Forged A4 Flat Top Upper Receiver - M4 Feed Ramps Includes: - Add to Cart. However Ive built numerous ar15 and lr308 rifles and pistols. The barrels also had to be modified. Lol. so im thinking I might as well just get the unramp upper. With the increased use of larger-diameter cased cartridges, the M4 feed ramps are proving their values when using them in those cartridges. So the engineers lowered the feed rampa into the receiver. Thanks! Notice how the ramp starts on the barrel extension and not in the receiver. First of Im not a gunsmith or firearms professional. I've seen uppers with and without anodizing on M4 ramps . it seems to me to be about 50/50 with and without. Edited April 27, 2014 by Mark Gale Its easier to add feed ramps to the receiver not so easy to add them to the barrel extension. In short, if you have a Dremmel you can do it yourself. Ar-15 Manufacturers Should Be Avoided: Which Should You Buy? This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. 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. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. "It will last 5k rounds instead of 4k. In military situations, it is advantageous for rifles to function with damaged, worn, or less than ideally serviceable magazines. Gas block area is .750 diameter. Editors Note: This article was originally published in January of 2019. By Yamil Sued August 6, 2021. Good call. Its not a big deal but still an important thing to remember and understand. It's best to have M4 ramps on both the upper and barrel. 50 bucks one way or the other on the barrel ain't squat! It's best to use rifle/rifle combo or M4/M4. Recommend using a gunsmith this route too if you are not comfortable. Finding the proper upper receiver is your best option. 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. Making a non M4 feed ramp barrel work in an M4 feed ramp upper. I have looked and looked and looked. 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. Will my A3 upper reciever work with my M4 barrel extention.According to some or your posts they will.Thanks Bill. from my service in the 70s to my personal weapons, all of my ARs are early 1970 slab sided Colt SP1s. Polishing the edges of the chamber mouth to remove the edges of that chamfer will. Create Account; Log Out ; Log In ; Wishlist 0; Shopping Cart 0; Home; About I have seen it done many, MANY times and if done right, it works/functions 100% without issue. M4 feed ramp barrel in a non M4 ramp upper - AR15.COM Interesting reading. Some barrels I see for sale say they include M4 feed ramps, and some uppers say they include them too. Bullets tend to bump, snag, and stub on these guns. What is an m4 feed ramp? This 20" BCM barrel is machined from SS410 stainless steel. 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. Konza Defender M-LOK 5.56 16" Rifle - $399.99 | gun.deals There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. Create an account to follow your favorite communities and start taking part in conversations. Is it kosher to add M4 feed ramps to a standard upper to match an m4 ramped barrel? 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. Related: If you are using a Ar rifle, best green laser sight is good choice for hunting. Additionally, in this increasingly specialized world of AR-15 parts that we live in, there are proprietary feed ramp cuts used for some alternate cartridges, such as .458 SOCOM. 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. I've seen that pic, it is a good reference. Standard vs M4 Feed Ramps, what's the difference #1056 I'm a machinist in the aerospace industry and lucky enough to have unrestricted access to a really nice machine shop so the modification from rifle to M4 feed ramps is no sweat, I've done it once before a few years back with a .250" carbide cutter in the mill for a friend and it came out looking indistinguishable from a true M4 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. Don't ever put non M4 ramped barrel on a M4 ramped upper receiver. The barrel extension and the receiver both have to have the cuts. The manufacturer said they had sold hundreds of barrels with out problems reported. I'm a machinist in the aerospace industry and lucky enough to have. Looking to spend $180-250 (depending on condition, forge mark and if a rear sight is included or not.) And it appears that the bolt is slamming into the top of the bullet. Press question mark to learn the rest of the keyboard shortcuts. The difference between standard feed ramps and M4 ramps is easy to see. I will check with compass lake. The rifle-platform M16s dont use them. Well, over the course of 5,000 rounds at .40 a round, you spent two grand on ammo. 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. The tip of the cartridge rarely comes into contact with the upper receiver. I found the article very informative. Both. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. 3. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. 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. Full M4 feed ramps start on the upper and continue onto the barrel extension. Do you need an M4 feed ramp on your AR? Here is some info. Any use of this content without express written consent is prohibited. As they are becoming more and more a standard, and certainly do not do any harm to us. I would only add the feed ramps to the receiver if I had feeding issues, which you should not have. 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. CUTTING M4 RAMPS - YouTube The M4, and the CAR-15, before it have had similar problems like the ones you mentioned. I got my help from this thread, and thank you again to ORD. practical_man For new construction barrels only. pm me at BOG or PG, or get in touch with my number 09177542777 if you're interested. Powered by Invision Community. By Our 6mm ARC barrel come standard with 1-7.5 Twist, M4 Feed Ramps and gas tube. http://www.ar15fornoobs.com/wp-content/uploads/feedramps.jpg. There's a 7 degree difference between standard and M4 ramps. i have an extra brand new M4 barrel extension ramp to replace a rifle ramp. Metal cases ammunition such as Wolf through an M4 clone?