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. An older-version (or A2-style) feed ramp is cut only on the barrel extension itself (top). M4 Feed ramps on barrel extensions are a solid example. Lol. I read in Bravo company that there are 2 kinds of flat top upper. -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! He had more to say and added some more engineer and gun designer speak too. Not all mil-spec features advertised on the product information are the real mil-specs. While I've got everything apart, I'm thinking I just want to put an M4 barrel extension on. Most of barrel assemblies and upper receivers on the market now have a present of M4 feed ramps. When I function tested it the first time with live half-jacketed rounds I had the worst FTF jam I have ever experienced. Both. Man, its crazy how many of yall have absolutely no idea why you do what you do. For a better experience, please enable JavaScript in your browser before proceeding. As a result, the factory machined M4 feed ramps on the receiver are hard coat anodized which adds significant strength to the aluminum. Some gun owners believe that the M4 ramps can help for some of the larger-diameter cartridges in use. Bullets tend to bump, snag, and stub on these guns. Your discussions, feedback and comments are welcome here as long as they are relevant and insightful. It is removeable with a special wrench and a barrel clamp/vise. Its not a big deal but still an important thing to remember and understand. M16s and M16-A1s run at 750 rounds per minute in full auto. If I have a rifle ramp upper and get the barrel later and coincidentally will have an m4 ramp. - 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. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. Shopping with us is absolutely safe - you never have to worry about credit card safety when shopping here Share your latest AR build or photos from the range with #RangeDayFriday for a chance to win a new firearm! if you are OK with 3MOA, you might go 20,000 rounds! In most cases the ramps only help during full auto mode while cycling at a high rate. 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-. Installing a Luth-AR Rifle Buffer Tube and an A2 Stock #1041. I'm lookin for a clear definition as to what they are, and what they do to enhance a given rifle's performance? I checked what I have now. Can I use a barrel with M4 feed ramps with an upper that isnt M4 matched? The good idea is that the round, presented at a lower plane, will contact other lower feed ramps and go right on in. Thanks for explaining the feed ramp topic in a couple of different ways. I would just make sure to order rifle upper with rifle barrel extension or M4 upper with M4 barrel extension. There's no downside to having M4 feedramps on your carbine, but they are not as necessary without full auto and when using followers that will not tilt (or in a 20 AR15). It's best to have M4 ramps on both the upper and barrel. Thats receivers, bolts, and on down the list of the 100 or so parts that can make up an AR-15. Looking For Bear Creek Arsenal Barrels Review? I like getting another Upper idea then you could end up with two rifles! It is milled out of 6061 T6. This Kit is made to cut or polish the STEEL Feed Ramps on your Barrel Extension ONLY. Avoid Polishing Too Lightly Or Too Roughly Your email address will not be published. Shorter length equates to much higher pressure in the 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. As suggested, its best to match the upper and barrel extension no worries that way. 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. The barrels also had to be modified. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. 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. The trust part is accepting claims of USGI-spec parts actually being done to not only blueprint dimensions, but also made from the correct materials treated to the same processes. "C" stamp and CAGE code available. 50 bucks one way or the other on the barrel ain't squat! and add them to non-m4 barrels.? document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Owning Best Ruger SR9c Accessories Can Change Your Life. 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. I've seen uppers with and without anodizing on M4 ramps . it seems to me to be about 50/50 with and without. Our 6mm ARC barrel come standard with 1-7.5 Twist, M4 Feed Ramps and gas tube. Feed ramps being m4 or. I am having a tough time finding an in-stock barrel (18 or 20 incher) with a rifle extension on it. If this is your first visit, be sure to In case My barrel is rifle ramp it won't be so bad after all. Married pretty well with my Seekins machined lower. Go back to writing school. can you buy feed ramps individually? Check often for fit. It's best to use rifle/rifle combo or M4/M4. Higher pressure equte to parts (bcg, buffer, buffer spring, ROUNDS, etc) experiencing much higher wear/tear. 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. I wont buy a barrel that isnt a wylde 223 556 but Im only now noticing. Use this M4 Barrel extention with M4 feedramps. Brevity matters. This has been my concern with modifying the aluminum parts. Ready to drop onto a complete lower receiver. I will check with compass lake. They guide the bullet up and into the chamber. which is basicallly an m16a1 cut down. 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 Its a miracle! 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. 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. aaargh.. that's the setup I hate to see. "A Bad Day At The Range Is Better Than A Great Day Working". Then the manufacturer discontinued the barrel. I would only add the feed ramps to the receiver if I had feeding issues, which you should not have. I had seen these pix years ago and dismissed the idea of mix and match. I've modified barrel/receivers even before M4 cuts came out and done some receivers when the barrels had cuts. We reserve the right to edit as appropriate, delete profane, harassing, abusive and spam comments or posts, and block repeat offenders. No need to alter the upper. Create an account to follow your favorite communities and start taking part in conversations. 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. Hasn't misfed yet, through initial break in up through 1k rounds, and that's mag length ammo. 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. 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. The M4 was the first (allegedy) carbine length gas system. I can assure you that most mods that deviate from the original design aren't 100% reliable. Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? Instead, I just loaded up each mag with two rounds, and pushed the rounds forward by hand until the tip of . 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. 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 Upload or insert images from URL. Paste as plain text instead, A forum community dedicated to drag racing drivers and enthusiasts. By Its highly recommended to put any AR-platform firearm together with a matching M4 barrel extension and upper receiver set. All NFA rules apply. well.. it's kinda hard to get stuff in this part of the world. 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. 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. 16" Pre-Ban M4 Profile Barrel Assembly CARBINE Gas System About Upper assembly comes completely head spaced and test fired. Contents: 1 Diamond Burr (For Colt 2 Stage Ramps) 1 Cut Lube (For Diamond Burr) 1 Bullet Stone (For Reshaping . . M4 extension with .350 M4 style feed ramps 11 Degree Target Crown Threaded Muzzle 5/8"x24 TPI Weight: 26.5 ounces 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. I was planning on using a Daniel Defense 14.5 pencil barrel, because like the C8 they are CHF, lightweight profile, and .750 at the FSB (And also because quality carbine pencil barrels with .625 gas blocks seem to be in short supplyor else I'd just build a 723 clone.) . There's a 7 degree difference between standard and M4 ramps. 's blog. 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. Copyright 1996-2023 AR15.COM LLC. The M4 ramps, if I am not mistaken, were originally made to help reduce malfunctions on the M4 carbine. What is an m4 feed ramp? 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 Issues can arise when receivers and barrel extensions are mismatched. April 23, 2014 in Rifle - Technical. So, lets glide down these lines below to erase your misconceptions about them. There is no way to make a carbine barrel extension out of a rifle barrel extension, period, full stop. ago Costs about $40-50 to have the feed ramps reprofiled from what I can gather.
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adding m4 feed ramps to barrel