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. 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. Upper Receiver, A4, Flat Top, USGI, Numbered, AR-Stoner Upper Receiver Stripped AR-15 A3 Flat-Top Matte, Black River Tactical 16 Cold Hammer Forged Optimum Barrel Accuracy Evaluation. Insert the barrel and sharpie the cut area, then use the right bit on a dremel. So I'm working on my first build, and I'm a little confused. It is removeable with a special wrench and a barrel clamp/vise. 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. Any use of this content without express written consent is prohibited. Surplus Colt 14.5 M4 SOCOM Carbine Barrel 1/7 Twist Looking for a black stripped A1 upper with non m4 feed ramps (just realized the upper I have wont work with my barrel). Required fields are marked *. I like all my guns to be reliable. Edited April 27, 2014 by Mark Gale . Mil-spec is good for the masses, and if you want the job done it is a great start. instead of mil-spec. 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. Those ramps line up with the barrel, which are cut deeper than on a rifle barrel. I notice that's a Gibbz (or Gibbz-type) upper. AR Tech Tip - Checking M4 Ramps for overhang - YouTube DSA has fat top, Mueller, non feed ramp uppers for $40. 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 would just make sure to order rifle upper with rifle barrel extension or M4 upper with M4 barrel extension. 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. Founded by Frank Galli in 2000, Snipers Hide has been offering informational videos, podcasts, and other support to its users in one location. All uppers are assembled cleaned and tested before shipping. Just put it in and shoot it. 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. Create an account to follow your favorite communities and start taking part in conversations. CUTTING M4 RAMPS - YouTube M16's fed pretty well before the M4 feed ramps were introduced. The parts are interchangeable. BCM 14.5" MK2 Upper (Standard) w/ 13" MLOK Handguard - FDE Create an account to follow your favorite communities and start taking part in conversations. They were not intended to be super long range man killers. AR 15 16" .350 Legend Nitride M4 Profile Barrel 1:16 And that is the important thing! I built the upper using a Mega upper with a Compass Lake 18" barrel. upper recievers and barrels are hard to comeby. Display as a link instead, From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. These Mil-Spec M4 feed ramps are part of the original CNC manufacturing process. Proper maintenance and lubrication. Went back to the sellers website and found I was not the only one with problems. 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. 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. practical_man I would only add the feed ramps to the receiver if I had feeding issues, which you should not have. Paste as plain text instead, I didnt think anything about it having M4 feed ramps. 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 . Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. Issues can arise when receivers and barrel extensions are mismatched. This space is for pictures of "retro" Stoner rifles and completed or partial retro AR-15 builds, as well as discussions about either. The Shooter's Log, is to provide informationnot opinionsto our customers and the shooting community. I'm planning on replacing my forearm with a Larue 13.5. The barrel blanks available are made from 416 Stainless Steel. Any body need a anchor for a very small boat? Powered by Invision Community, M4-style barrel extension with Rifle-type upper. "It will last 5k rounds instead of 4k. I can probably get the upper reciever first. 308 m5 using m4 feed ramps, which I belive are for the smaller round like. Do you need an M4 feed ramp on your AR? Here is some info. which is basicallly an m16a1 cut down. The M4 receiver feed ramps are cut at a steeper angle and, as a result, extend down into the receiver wall. "C" stamp and CAGE code available. Figuring Out Feed Ramps | Feed Ramp Tips | The Shooter's Log Ballistic Performance of Federal Punch .22 LR Ammunition with the Heritage Barkeep #1063. Whether they materialize or not depends on the direction of the mismatch. If you ever have an issue, then look at getting a correct barrel for the upper. 30 cal. Is it worth the extra 50 bucks?" This USGI modification was done to both the barrel extension and the upper receiver, creating a longer and steeper feed ramp. RTS Bartlein: 6mm ARC 26" - Compass Lake Engineering, LLC By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. 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. Copyright 1996-2023 AR15.COM LLC. So I called. Modify AR15 A2 barrel extension for M4 feed ramp? Snipers Hide is a community of Snipers of all kinds, focusing on long range shooting, accuracy, and ballistics. I found the article very informative. 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. well.. it's kinda hard to get stuff in this part of the world. I should have taken my own advice for once. AR9 - Help diagnosing feeding issue - Calguns.net CARBON-15 Stripped Lower Receiver I use it for hunting dogs only. No need to alter the upper. So, I had purchased a 458 upper. Can I use a barrel with M4 feed ramps with an upper that isnt M4 matched? Powered by Invision Community. My experience with ARs is all A-1s. The barrels also had to be modified. I got my help from this thread, and thank you again to ORD. Anodized red parts. You need to match up barrels to receivers for optimum performance. 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. [WTB] Black A1 carry handle upper NON-m4 feed ramp $200 Pasted as rich text. aaargh.. that's the setup I hate to see. Your link has been automatically embedded. I think your mistaking that with adding ramps to the receiver. Feels like a silly question now that it makes sense. Which Model Colt 1911 is For Me? Guess what? Reddit and its partners use cookies and similar technologies to provide you with a better experience. 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 Ar-15 Manufacturers Should Be Avoided: Which Should You Buy? 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). Del-Ton, Inc. AR-15 16" M4 Custom Upper To conclude, the M4 feed ramps bring a lot of improvements to the AR-platform firearms. And it appears that the bolt is slamming into the top of the bullet. AR15 20 inch Upper Receiver Group (SS) w/ Handguard | BCM *Must have a registered ARFCOM account to win. Ready to drop onto a complete lower receiver. You also repeated yourself. On AR9's, I understand the distance between the Mag Follower and the Feed Ramp is a known complication in the design. Barrel FAQs | Ballistic Advantage Add M4 cuts to Barrel Ext $15.00 We can modify your rifle extension to match the M4 cuts in an upper receiver. 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 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). When you need to nail something you use a hammer not a wrench. FN AR-15 5.56X45mm Nato . 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. They offer a lower, more extensive, and smoother entry for any round of ammo, whether its necessary or not. You cannot paste images directly. Your discussions, feedback and comments are welcome here as long as they are relevant and insightful. Factory said its fine . This gave it a longer point for the magazine to allow the rounds to come out of the magazine and feed into the chamber. All this basically means is that the ramps continue from the barrel extension down through the upper receiver tonthe magazine. Higher pressure equte to parts (bcg, buffer, buffer spring, ROUNDS, etc) experiencing much higher wear/tear. AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. How to Polish a Feedramp Quick and Easy | Firearms Talk Questions on how to install your new BA barrel? Thats receivers, bolts, and on down the list of the 100 or so parts that can make up an AR-15. DoubleStar M4 clone opinions | Survivalist Forum That's an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. Related: If you are using a Ar rifle, best green laser sight is good choice for hunting. No Feed Ramps on upper? - General Discussion - 308AR.com Community 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. I wont buy a barrel that isnt a wylde 223 556 but Im only now noticing. 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. AR-15 Feed Ramp Problems - School of the American Rifle I've seen that pic, it is a good reference. hey bro nice to see you here!!! I will attest that a rifle upper and a barrel with the M4 feedramps works just fine. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. 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. This has been my concern with modifying the aluminum parts. 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! 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. By 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. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. In general, all you need to understand is that the M4 feed ramps include the barrel extension and upper receiver. 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. 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 what I fear the most is having an m4 ramp upper and then getting a barrel with a rifle ramp. 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. That is what I tell people when they try to convince me that they need a stainless barrel instead of chrome-moly. Adding M4 feedramps to A1/C7 upper - M4Carbine.net pictures would help. Thats true overall and good to keep in mind. Recommend using a gunsmith this route too if you are not comfortable. 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. However Ive built numerous ar15 and lr308 rifles and pistols. As a result, the factory machined M4 feed ramps on the receiver are hard coat anodized which adds significant strength to the aluminum. I suggest you get a rifle receiver. Im an old vet, now retired and looking to build some ARs as a hobby to keep me doing something that I will enjoy. Either way is good and both types work great with semi auto only guns. With the increased use of larger-diameter cased cartridges, the M4 feed ramps are proving their values when using them in those cartridges. The mil actually only specs M4 feed ramps for use in its M4s. If this is your first visit, be sure to That puts the cartridge in a position where the extended feed ramp improves the breech-loading design. Both. Add 3% to the total cost for credit card purchases. AR-15 Barrel Extension Question - Sniper's Hide Forum which is bad combo. so im thinking I might as well just get the unramp upper. Here's some info from Randall Rauch aka www.ar15barrels.com, if your barrel extension has M4 ramps you should have an upper receiver also with the ramps. P2A PATRIOT 22" 223 Wylde 1/7 Rifle Length Melonite Fluted Heavy Bull So, what is the difference between M4 feed ramps and regular ones? Will my A3 upper reciever work with my M4 barrel extention.According to some or your posts they will.Thanks Bill. Thats an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. Forged 7075-T6 aluminum is harder than a bulls balls. Absolutely nothing to do with casing diameter, or whatever other weird sht you guys imagine. m4 feed ramps - The Armorer - AR15Armory.com In most cases the ramps only help during full auto mode while cycling at a high rate. Here you can see an upper with "rifle" feedramps. 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. If I have a rifle ramp upper and get the barrel later and coincidentally will have an m4 ramp. 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). Brevity matters. M4 Barrel Extension (M4 Feedramps) - Bravo Company USA They . 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. Then the manufacturer discontinued the barrel. Change the angle so that the ramp ends at the exact same point. The Fora platform includes forum software by XenForo. I cant advise on that one folks. By By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. There is no way to make a carbine barrel extension out of a rifle barrel extension, period, full stop. can the barrel extension be bought individualy? The difference between standard feed ramps and M4 ramps is easy to see. Good call. The Mission of Cheaper Than Dirt! May 17, 2008 in The Armorer. Your email address will not be published. 338 and others not the .308 76251 or 6.5 creedmore which o think should have a.30cal feed ramp.? Hasn't misfed yet, through initial break in up through 1k rounds, and that's mag length ammo. #2. 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. All things being equal and having used both weapons extensively, Id rather have the feed Ramps. Thanks. can you buy feed ramps individually? Not all mil-spec features advertised on the product information are the real mil-specs. Instead, I just loaded up each mag with two rounds, and pushed the rounds forward by hand until the tip of . You wrote that much to make a point that should have taken about 100 words? The dimensions are different between the two, so theyd have to change some things to the feed ramps dimensions. 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. A forum community dedicated to drag racing drivers and enthusiasts. M4 can better explain their benefit, although they help with more reliable feeding. I've been thinking about doing sort of an "Early Diemaco C8 carbine" clone build with a C7 style 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. Dec 17, 2020. Rear side of a CZ-75B pistol barrel showing the (here dirty) feed ramp. Feed ramp - Wikipedia They provide a lower, wider, and smoother entry for any round of ammo, whether its necessary or not. 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. Don't forget read more information about it here! I don't have much to add re: feed ramps, but. I didn't forsee that we'd ever see the day when replacement parts would be so hard to get. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. If I can correct an issue before it's an issue that is preferred. 16" Pre-Ban M4 Profile Barrel Assembly CARBINE Gas System About Upper assembly comes completely head spaced and test fired. What's the difference? It may not display this or other websites correctly. Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? Bullets tend to bump, snag, and stub on these guns. The A2's are pretty reliable guns, but trashed mags can cause them to have malfunctions also. The Differences Between an M4 and an AR15 - Music Raiser There's a 7 degree difference between standard and M4 ramps. $101.95. I recently built an AR9 (Glock Mags) that has been running flawlessly for about 3-400rds. But, as with anything else, this work can go too far. 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. The barrel extension and the receiver both have to have the cuts. Description. 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 -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! 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 M4, and the CAR-15, before it have had similar problems like the ones you mentioned. Then you can get a regular rifle barrel for the upper with no ramps. 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. I had seen these pix years ago and dismissed the idea of mix and match. Is getting it as part of the upper better? Feed Ramp Polishing - How To Do It Properly? - Homestead & Prepper Either way is good and both types work great with semi auto only guns. Oh well, as I tell my lovely and understanding bride, guns are relatively free. it's the ammo and training that cost real money. 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 Press question mark to learn the rest of the keyboard shortcuts. He had more to say and added some more engineer and gun designer speak too. In military situations, it is advantageous for rifles to function with damaged, worn, or less than ideally serviceable magazines. Site towers are not "F" marked SPECS: Length- 14.5". M4 feed ramps. This is one time it's better to go a little too far than to leave an edge for the . After two months of back and forth, cleaned up the feed ramps. Standard vs M4 Feed Ramps, what's the difference #1056 If you consider this article useful, share it with anyone in need! Not saying a really good gunsmith cant do it, just that theres a bit of an involved process. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. No feed ramps. An older-version (or A2-style) feed ramp is cut only on the barrel extension itself (top). Share it in the comments section. i have the rifle barrel. It's best to use rifle/rifle combo or M4/M4. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. This can lead to a rare but odd situation; barrel and receiver mismatch. and add them to non-m4 barrels.? A4 Complete Upper Receiver - 7075 Forged A4 Flat Top Upper Receiver - M4 Feed Ramps Includes: - Add to Cart. It has ran flawlessly (barring tuning of the gasblock when new) with several different brands of magazines and ammo. All Rights Reserved. Upload or insert images from URL. 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? Everything that you have on your side to make any weapons more reliable and work when it absolutely needs to is a plus. BUT, I DO NOT TRUST MY LIFE TO THAT WEAPON. Seems like it should work to me, but be a real challenge to keep clean and be damned ugly to boot. Also, barrel life is relative. 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. Only took a few minutes. In this episode of Gun Stock Reviews, we look at the difference between M4 Ramps and the old standard ramps of the past. This 20" BCM barrel is machined from SS410 stainless steel. First of Im not a gunsmith or firearms professional. 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. 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. Some argue that, factually, its a step to enable a smoother feeding. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. Its not a big deal but still an important thing to remember and understand. 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 . April 23, 2014 in Rifle - Technical. 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'd rather just pay the gunsmith to make it work than hunt down another barrel/upper if possible. Interesting reading. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. This Kit is made to cut or polish the STEEL Feed Ramps on your Barrel Extension ONLY. LanceRiley, Previous. All Rights Reserved. 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.