M4 Barrel Extension (M4 Feedramps) - Bravo Company USA LanceRiley, Most work performed while-you-wait, evening and saturday appointments available. They were not intended to be super long range man killers. Any use of this content without express written consent is prohibited. PRI MK 12 Mod H 16" 223/5.56 Upper w/ 1-7 twist AR9 - Help diagnosing feeding issue - Calguns.net 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. So there's a lot more going on with rounds bouncing up and down in the mags etc. M4 can better explain their benefit, although they help with more reliable feeding. 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. No Feed Ramps on upper? - General Discussion - 308AR.com Community The difference between standard feed ramps and M4 ramps is easy to see. They . And that is the important thing! Full M4 feed ramps start on the upper and continue onto the barrel extension. 16" Pre-Ban M4 Profile Barrel Assembly CARBINE Gas System About Upper assembly comes completely head spaced and test fired. Clear editor. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. Avoid Polishing Too Lightly Or Too Roughly Previous. Change the angle so that the ramp ends at the exact same point. Should M4 feed ramps come with the barrel or upper? : r/ar15 - reddit Should not be too hard. Making a non M4 feed ramp barrel work in an M4 feed ramp upper. A4 Complete Upper Receiver. *Must have a registered ARFCOM account to win. I guess it depends on what your relationship to the necessary shop activities is. That is what I tell people when they try to convince me that they need a stainless barrel instead of chrome-moly. 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. I can assure you that most mods that deviate from the original design aren't 100% reliable. Issues can arise when receivers and barrel extensions are mismatched. Press question mark to learn the rest of the keyboard shortcuts. AR15 20 inch Upper Receiver Group (SS) w/ Handguard | BCM Contents: 1 Diamond Burr (For Colt 2 Stage Ramps) 1 Cut Lube (For Diamond Burr) 1 Bullet Stone (For Reshaping . They aid in feeding the round into the chamber from the magazine more easily, which make uppers and barrel extension matched. Only took a few minutes. AR Tech Tip - Checking M4 Ramps for overhang - YouTube The tip of the cartridge rarely comes into contact with the upper receiver. All Rights Reserved. I bought a .458 upper to go with it, with the extra internal clearance cut before anodizing. 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. 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. Barrel is medium SPR profiled barrel, threaded with a 1/2-28 thread for the AE brakes and collar. JavaScript is disabled. Your email address will not be published. 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. Feed ramps being m4 or. A feed ramp is a basic feature of many breech loading cartridge firearm designs. FN AR-15 5.56X45mm Nato . I built the upper using a Mega upper with a Compass Lake 18" barrel. I had seen these pix years ago and dismissed the idea of mix and match. Del-Ton, Inc. AR-15 16" M4 Custom Upper [ARCHIVED THREAD] - M4 feed ramp barrel in a non M4 ramp upper. M4 M-4 Feed Ramp Jam with 55 gr grain Bullets, Solution, Fix, AR15 AR-15 Stuck Cartridge iowaunemployment 21K views 10 years ago Comparing AR15 barrels -Faxon vs. Bear Creek arsenal-. #2. Thats an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. CARBON-15 Stripped Lower Receiver For the purposes of this chapter, we'll call the new one the M4, and the old one the AR. Looking to spend $180-250 (depending on condition, forge mark and if a rear sight is included or not.) Copyright 2016 - 2023 by AdventureFootstep.com. AR-15 Barrel Extension Question - Sniper's Hide Forum Gun smith said , not head spaced properly. The Differences Between an M4 and an AR15 - Music Raiser I've seen uppers with and without anodizing on M4 ramps . it seems to me to be about 50/50 with and without. M4 barrel to non M4 receiver is fine, but not the other way around. Jams and misfires. Add M4 cuts to Barrel Ext $15.00 We can modify your rifle extension to match the M4 cuts in an upper receiver. This gave it a longer point for the magazine to allow the rounds to come out of the magazine and feed into the chamber. 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 a result, the factory machined M4 feed ramps on the receiver are hard coat anodized which adds significant strength to the aluminum. The Fora platform includes forum software by XenForo. Which Model Colt 1911 is For Me? Ar-15 Manufacturers Should Be Avoided: Which Should You Buy? As suggested, its best to match the upper and barrel extension no worries that way. P2A PATRIOT 22" 223 Wylde 1/7 Rifle Length Melonite Fluted Heavy Bull No need to alter the upper. DSA has fat top, Mueller, non feed ramp uppers for $40. 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 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. Edited April 27, 2014 by Mark Gale The M4 was the first (allegedy) carbine length gas system. I too built a .458 SOCOM carbine . My alternative plan is to do exactly as you describe. ago Costs about $40-50 to have the feed ramps reprofiled from what I can gather. from my service in the 70s to my personal weapons, all of my ARs are early 1970 slab sided Colt SP1s. It's best to have M4 ramps on both the upper and barrel. I wont buy a barrel that isnt a wylde 223 556 but Im only now noticing. Factory said its fine . Earlfillmore 13 hr. can you buy feed ramps individually? I cant advise on that one folks. Thanks! 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. 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. Costs about $40-50 to have the feed ramps reprofiled from what I can gather. Seems counter intuitive to recommend an M4 cut upper, especially if the barrel Im looking at has the rifle feed ramp (not M4 cut). And that the M4s and M4A1s are issued M855 which has a slight difference in bullet shape vs. the older 55gr M193 BALL. Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? 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. Polishing the edges of the chamber mouth to remove the edges of that chamfer will. Theres a bit more to it than just polishing. M4 extension with .350 M4 style feed ramps 11 Degree Target Crown Threaded Muzzle 5/8"x24 TPI Weight: 26.5 ounces For a better experience, please enable JavaScript in your browser before proceeding. Add 3% to the total cost for credit card purchases. 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 is the barrel designed and profiled for the Mark 12 Mod 0 uppers and rifles. 6.5 Grendel Type 2 | 16" Black Nitride | 1:8 Twist Carbine Length Gas Any body need a anchor for a very small boat? 50 bucks one way or the other on the barrel ain't squat! The Shooter's Log, is to provide informationnot opinionsto our customers and the shooting community. For instance I was looking at the BCM upper receiver, and it said it had M4 feed ramps machined into the upper. Mil-spec is good for the masses, and if you want the job done it is a great start. 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. BUT, I DO NOT TRUST MY LIFE TO THAT WEAPON. I'll probably build a pistol out of this one. In short, if you have a Dremmel you can do it yourself. 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? You can post now and register later. I can probably get the upper reciever first. The M4 cut extends down beyond the edge of the barrel extension (has a scalloped appearance), and a correspondingly deeper cut in an M4-spec upper receiver effectively extends the ramps downward (they're lowered). Ok, So, in short, I've got a barrel on my Armalite upper (with M4 feed ramps in the upper) that has standard AR-15 (non-M4) ramps. Machined from 4150 Chrome Moly Vanadium Steel and feature a QPQ corrosion resistant finish and QPQ coated M4 feed ramp extension. 410 stainless is also harder and more corrosion resistant than conventional 416 stainless found in other commercially available precision barrels. Create an account to follow your favorite communities and start taking part in conversations. Remember less is more, little by little. 's blog. I don't have much to add re: feed ramps, but. Figuring Out Feed Ramps | Feed Ramp Tips | The Shooter's Log We reserve the right to edit as appropriate, delete profane, harassing, abusive and spam comments or posts, and block repeat offenders. 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. -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! pictures would help. They are better! colt A1E1 733 uppers didn't have extended carbine feedramps ? I would just make sure to order rifle upper with rifle barrel extension or M4 upper with M4 barrel extension. Feed ramps on barrel extensions are a good example. DoubleStar M4 clone opinions | Survivalist Forum Feed ramp - Wikipedia M4 16", SBN, 1:7, 5.56 NATO Barrel Specifications: - Caliber: 5.56 NATO (.223 REM) - Gas Tube: Car Add to Cart. Its not a big deal but still an important thing to remember and understand. Finding the proper upper receiver is your best option. Adding feedramps - M4Carbine.net Ready to drop onto a complete lower receiver. Full M4 feed ramps start on the upper and continue onto the barrel extension. Colt LE6920SOCOM M4 Carbine 5.56 16.1 Barrel SOCOM Sight 30-rd Supposedly you'll only notice issues with rapid/auto fire with a configuration like this. 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. So I'm working on my first build, and I'm a little confused. Whether they materialize or not depends on the direction of the mismatch. M4 feed ramps. A closer look at uppers and barrel extensions. By Your link has been automatically embedded. Just put it in and shoot it. In most cases the ramps only help during full auto mode while cycling at a high rate. Forged 7075-T6 aluminum is harder than a bulls balls. Barrels are Douglas 416 stainless steel with 1-7 twist with M4 feed ramps Interesting reading. Create Account; Log Out ; Log In ; Wishlist 0; Shopping Cart 0; Home; About 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 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. An older-version (or A2-style) feed ramp is cut only on the barrel extension itself (top). I checked what I have now. pm me at BOG or PG, or get in touch with my number 09177542777 if you're interested. You have a rifle barrel. Recommend using a gunsmith this route too if you are not comfortable. Powered by Invision Community, M4-style barrel extension with Rifle-type upper. There is no way to make a carbine barrel extension out of a rifle barrel extension, period, full stop. I've modified barrel/receivers even before M4 cuts came out and done some receivers when the barrels had cuts. Does it make a big difference? Display as a link instead, So, lets glide down these lines below to erase your misconceptions about them. By the time you made it work you spent more time, money, and effort than if you just bought a new barrel or upper. Its also recommended you polish the ramps once youve achieved the appropriate angle. 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. All Rights Reserved. Some suggest taking a grinder to the extension area. I've been thinking about doing sort of an "Early Diemaco C8 carbine" clone build with a C7 style upper receiver. M16's fed pretty well before the M4 feed ramps were introduced. Adding M4 feedramps to A1/C7 upper - M4Carbine.net A couple of times I ended up with the OK set up from the picture above. 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. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. When you need to nail something you use a hammer not a wrench. /r/ar15 is here for your favorite black gun links, build pics, questions and other tactical or practical information. All we do is dremmel it to match - we dont remove it and grind to any specific angle. No 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. You also repeated yourself. 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. upper recievers and barrels are hard to comeby. All this basically means is that the ramps continue from the barrel extension down through the upper receiver tonthe magazine. It has ran flawlessly (barring tuning of the gasblock when new) with several different brands of magazines and ammo. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. For a better experience, please enable JavaScript in your browser before proceeding. Looking for a black stripped A1 upper with non m4 feed ramps (just realized the upper I have wont work with my barrel). Single Action and Double Action Which One Is Better For You? The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. Backing up a ton: Any and all AR-15 barrel extensions have feed ramps. That's an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. Feed Ramp Polishing - How To Do It Properly? - Homestead & Prepper if you are OK with 3MOA, you might go 20,000 rounds! One new winner* is announced every week! Come join the discussion about racing, builds, pro mods, hot rods, events, turbos, nitrous, superchargers, and more! 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. This space is for pictures of "retro" Stoner rifles and completed or partial retro AR-15 builds, as well as discussions about either. Thats true overall and good to keep in mind. They provide a lower, wider, and smoother entry for any round of ammo, whether its necessary or not. Cutting M4 feed ramps - Calguns.net Its easier to add feed ramps to the receiver not so easy to add them to the 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. Hasn't misfed yet, through initial break in up through 1k rounds, and that's mag length ammo. The photo shows the dents and the bolt lugs line up perfectly. 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. They are also 1/7 twist, 4150 steel, chrome lined, and button rifled like the real deal! But, as with anything else, this work can go too far. With the bcg moving that much faster, the magazine springs were having a hard time supplying the rounds fast enough, AS WELL AS the tips of the rounds were digging into the feed ramps and catching. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. Bullets tend to bump, snag, and stub on these guns. In general, all you need to understand is that the M4 feed ramps include the barrel extension and upper receiver. 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. Related: If you are using a Ar rifle, best green laser sight is good choice for hunting. The barrel extension and the receiver both have to have the cuts. If you have a bolt that you would like to use you are welcome to ship it to us for accurate headspace. In military situations, it is advantageous for rifles to function with damaged, worn, or less than ideally serviceable magazines. Guess what? is the m4 feedramp common in barrel extensions? Go back to writing school. 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. The barrel blanks available are made from 416 Stainless Steel. I'm planning on replacing my forearm with a Larue 13.5. The barrels also had to be modified. I prefer them. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. 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. Use this M4 Barrel extention with M4 feedramps. However, its rare now to find an upper receiver or a ready-to-go barrel that doesnt have the M4 cuts. Then the manufacturer discontinued the barrel. You can put a M4 barrel and non-M4 receiver together, but you can't mismatch them the other way. I replaced the M4 feed ramp barrel with a monolithic feed ramp barrel and no more problems. 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. While I've got everything apart, I'm thinking I just want to put an M4 barrel extension on. Installing a Luth-AR Rifle Buffer Tube and an A2 Stock #1041. If you ever have an issue, then look at getting a correct barrel for the upper. ago KrinkyDink2 9 hr. By Yamil Sued August 6, 2021. The upper is designed to have two levels of top rails for mounting of night vision in front of scopes. 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. Go slow and you'll be done in no time. 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. When I function tested it the first time with live half-jacketed rounds I had the worst FTF jam I have ever experienced. M4-style barrel extension with Rifle-type upper - Rifle - Technical M4 Feedramps - AR-15 Pro "C" stamp and CAGE code available. 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. However Ive built numerous ar15 and lr308 rifles and pistols. Try this little exercise: 1. I am having a tough time finding an in-stock barrel (18 or 20 incher) with a rifle extension on it. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. The rifle-platform M16s dont use them. 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. 1 is a standard and the other for use with m4 feed ramp barrels. The M-16/M4 are great weapons. Shorter length equates to much higher pressure in the upper receiver. Feed Ramps -300BlkTalk Either way is good and both types work great with semi auto only guns. That puts the cartridge in a position where the extended feed ramp improves the breech-loading design. Absolutely nothing to do with casing diameter, or whatever other weird sht you guys imagine. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. can the barrel extension be bought individualy? http://www.ar15fornoobs.com/wp-content/uploads/feedramps.jpg. Thats why AR10s- And Scar heavies exist for. Notify me of follow-up comments by email. BUT if you find someone to grind your feed ramps and they do a good job, post it up and let us know. M16s and M16-A1s run at 750 rounds per minute in full auto. Feeds flawlessly. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. The M4 style feed ramps and barrel extension provide consistent feeding and the matte black Manganese Phosphate finish resists external corrosion and oxidation.
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