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. Thats true overall and good to keep in mind. The M4 ramps, if I am not mistaken, were originally made to help reduce malfunctions on the M4 carbine. Its easier to add feed ramps to the receiver not so easy to add them to the barrel extension. 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. 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. In most cases the ramps only help during full auto mode while cycling at a high rate. Product Description Surplus Colt 14.5" SOCOM, carbine length gas system barrel from Colt. For use by barrel manufacturers. "A Bad Day At The Range Is Better Than A Great Day Working". Home Firearms Figuring Out Feed Ramps. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. 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. All Rights Reserved. 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. There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. Thanks. 's blog. Costs about $40-50 to have the feed ramps reprofiled from what I can gather. 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. A closer look at uppers and barrel extensions. 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-. If you consider this article useful, share it with anyone in need! No feed ramps. As suggested, its best to match the upper and barrel extension no worries that way. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. Also, barrel life is relative. Instead, I just loaded up each mag with two rounds, and pushed the rounds forward by hand until the tip of . It was in the last few issues of SAR. By 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. You must log in or register to reply here. 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. upper recievers and barrels are hard to comeby. I'm planning on replacing my forearm with a Larue 13.5. While I've got everything apart, I'm thinking I just want to put an M4 barrel extension on. I'm assuming that you only need the ramps from one or the other. All things being equal and having used both weapons extensively, Id rather have the feed Ramps. from my service in the 70s to my personal weapons, all of my ARs are early 1970 slab sided Colt SP1s. 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 Share it in the comments section. Is getting it as part of the upper better? Jams and misfires. I would only add the feed ramps to the receiver if I had feeding issues, which you should not have. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. The rifle-platform M16s dont use them. Only took a few minutes. 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. Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? You cannot paste images directly. I recommend putting any AR-platform firearm together with a matched M4 barrel extension and upper receiver set, just because you can. This is one time it's better to go a little too far than to leave an edge for the . 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. I have a 723 build (w/ C7 upper) and a 727 build (A2 upper) that use 14.5" Colt M4 barrels. so im thinking I might as well just get the unramp upper. Please be respectful of others. These Mil-Spec M4 feed ramps are part of the original CNC manufacturing process. One new winner* is announced every week! Proper maintenance and lubrication. True, which is why they're not even needed in semi autos. 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! The barrel Throat is the second most critical component after angles and should be polished with utmost care. which is basicallly an m16a1 cut down. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. For a better experience, please enable JavaScript in your browser before proceeding. The Fora platform includes forum software by XenForo. To measure just where the round makes impact on the feed ramps, I did not use any sort of micrometer to measure. This USGI modification was done to both the barrel extension and the upper receiver, creating a longer and steeper feed ramp. They are also 1/7 twist, 4150 steel, chrome lined, and button rifled like the real deal! Bullets tend to bump, snag, and stub on these guns. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. 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. I don't have much to add re: feed ramps, but. 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 Avoid Polishing Too Lightly Or Too Roughly This space is for pictures of "retro" Stoner rifles and completed or partial retro AR-15 builds, as well as discussions about either. 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. Founded by Frank Galli in 2000, Snipers Hide has been offering informational videos, podcasts, and other support to its users in one location. Only took a few minutes. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. 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. Here you can see an upper with "rifle" feedramps. if you are OK with 3MOA, you might go 20,000 rounds! For the purposes of this chapter, we'll call the new one the M4, and the old one the AR. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. Copyright 1996-2023 AR15.COM LLC. In military situations, it is advantageous for rifles to function with damaged, worn, or less than ideally serviceable magazines. Full M4 feed ramps are on both the upper and barrel extension. I didn't forsee that we'd ever see the day when replacement parts would be so hard to get. Most of barrel assemblies and upper receivers on the market now have a present of M4 feed ramps. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. I would just make sure to order rifle upper with rifle barrel extension or M4 upper with M4 barrel extension. Somwhere in the 1990s I believe, Colt designed the M4 feed ramps, where they took some of the material out of the upper receiver, cut two little ramps in it and then cut the ramps in the barrel extention a little further forward. What is the difference between Modern, Performance, and Premium Series Barrels? Factory said its fine . If your upper isn't showing signs of bullets rubbing on the aluminum under the barrel extension, you should be good with M4 ramps. M4 can better explain their benefit, although they help with more reliable feeding. Its not a big deal but still an important thing to remember and understand. Previous. 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 JavaScript is disabled. I will attest that a rifle upper and a barrel with the M4 feedramps works just fine. Powered by Invision Community. instead of mil-spec. Thank you for answering the question do well. Would not feed to save its life! Snipers Hide is a community of Snipers of all kinds, focusing on long range shooting, accuracy, and ballistics. They offer a lower, more extensive, and smoother entry for any round of ammo, whether its necessary or not. Our 6mm ARC barrel come standard with 1-7.5 Twist, M4 Feed Ramps and gas tube. An older-version (or A2-style) feed ramp is cut only on the barrel extension itself (top). If your mag catch is at Spec height, you should not have a problem with an M4 cut barrel in a rifle receiver. AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. hey bro nice to see you here!!! The M4 receiver feed ramps are cut at a steeper angle and, as a result, extend down into the receiver wall. M4 Feed ramps on barrel extensions are a solid example. The M4 style feed ramps and barrel extension provide consistent feeding and the matte black Manganese Phosphate finish resists external corrosion and oxidation. And that the M4s and M4A1s are issued M855 which has a slight difference in bullet shape vs. the older 55gr M193 BALL. So, what is the difference between M4 feed ramps and regular ones? Forged 7075-T6 aluminum is harder than a bulls balls. What's the difference? All Rights Reserved. We reserve the right to edit as appropriate, delete profane, harassing, abusive and spam comments or posts, and block repeat offenders. I wont buy a barrel that isnt a wylde 223 556 but Im only now noticing. Dec 17, 2020. It is removeable with a special wrench and a barrel clamp/vise. . The good idea is that the round, presented at a lower plane, will contact other lower feed ramps and go right on in. It's best to have M4 ramps on both the upper and barrel. I've modified barrel/receivers even before M4 cuts came out and done some receivers when the barrels had cuts. The dimensions are different between the two, so theyd have to change some things to the feed ramps dimensions. Lol. Thread: Adding M4 feedramps to A1/C7 upper. $101.95. 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. Now move move the on deck cartridge forward to the 3/8 of inch position and again note the position of the tip of the bullet in relationship to the barrel extension. 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. A couple of times I ended up with the OK set up from the picture above. They were not intended to be super long range man killers. Does it make a big difference? They provide a lower, wider, and smoother entry for any round of ammo, whether its necessary or not. It's best to use rifle/rifle combo or M4/M4. 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. You wrote that much to make a point that should have taken about 100 words? Remember less is more, little by little. 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. 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). BrianEnos.com The angle is going to be key, alot of people attempt to mimic the angle of the barrel feed ramps, this is incorrect. - 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. Display as a link instead, Amazing what happens in a thread over a simple question. Absolutely nothing to do with casing diameter, or whatever other weird sht you guys imagine. 1 is a standard and the other for use with m4 feed ramp barrels. I'm a machinist in the aerospace industry and lucky enough to have. 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 AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. Just put it in and shoot it. Add 3% to the total cost for credit card purchases. Feed ramps on barrel extensions are a good example. There is no way to make a carbine barrel extension out of a rifle barrel extension, period, full stop. Man, its crazy how many of yall have absolutely no idea why you do what you do. Is it worth the extra 50 bucks?" Sent back again. Contents: 1 Diamond Burr (For Colt 2 Stage Ramps) 1 Cut Lube (For Diamond Burr) 1 Bullet Stone (For Reshaping . Create an account to follow your favorite communities and start taking part in conversations. Id just get one for that barrel and find a barrel with m4 extension for the upper you already have. Well, over the course of 5,000 rounds at .40 a round, you spent two grand on ammo. The barrel blanks available are made from 416 Stainless Steel. Anodized red parts. Brevity matters. In case My barrel is rifle ramp it won't be so bad after all. I should have taken my own advice for once. Full M4 feed ramps start on the upper and continue onto the barrel extension. I bought a .458 upper to go with it, with the extra internal clearance cut before anodizing. There is a picture of the various options, hopefully another poster can link them. Thats an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. Single Action and Double Action Which One Is Better For You? *Must have a registered ARFCOM account to win. On AR9's, I understand the distance between the Mag Follower and the Feed Ramp is a known complication in the design. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. Installing a Luth-AR Rifle Buffer Tube and an A2 Stock #1041. #2. So the engineers lowered the feed rampa into the receiver. One new winner* is announced every week! Check often for fit. If I have a rifle ramp upper and get the barrel later and coincidentally will have an m4 ramp. You need to match up barrels to receivers for optimum performance. My alternative plan is to do exactly as you describe. Press question mark to learn the rest of the keyboard shortcuts. Thats receivers, bolts, and on down the list of the 100 or so parts that can make up an AR-15. You absolutely do not want it the other way around however. 5. Went back to the sellers website and found I was not the only one with problems. The M4 was the first (allegedy) carbine length gas system. Anything else you want to share about M4 clones would be appreciated, especially when it comes to a reliable rifle. M4 Feed ramps on barrel extensions are a solid example. So, an M4 feed ramp includes the barrel extension and the upper. I read in Bravo company that there are 2 kinds of flat top upper. can you buy feed ramps individually? Backing up a ton: Any and all AR-15 barrel extensions have feed ramps. Reddit and its partners use cookies and similar technologies to provide you with a better experience. 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. this is the barrel designed and profiled for the Mark 12 Mod 0 uppers and rifles. I can probably get the upper reciever first. A4 Complete Upper Receiver - 7075 Forged A4 Flat Top Upper Receiver - M4 Feed Ramps Includes: - Add to Cart. Both. There's a 7 degree difference between standard and M4 ramps. The barrel is supposed to have the M4 feed ramps. It has 2 ramps cut into the receiver to help the rounds feed into the chamber. I picked up a side charging upper from Sundevil last year. I found the article very informative. I suggest you get a rifle receiver. 3. I will check with compass lake. 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. Then you can get a regular rifle barrel for the upper with no ramps. Semi autos run slower than full autos. "It will last 5k rounds instead of 4k. Ideally both. However, its rare now to find an upper receiver or a ready-to-go barrel that doesnt have the M4 cuts. AR9 - Help diagnosing feeding issue. 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. M4 ramps help in feeding in for carbine in full auto. So I'm working on my first build, and I'm a little confused. 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. M4 feed ramps are not an original design, they were designed for the M4 In fact, the . This 20" BCM barrel is machined from SS410 stainless steel. I notice that's a Gibbz (or Gibbz-type) upper. 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 first reason is that they are, indeed, better. Mil-spec is good for the masses, and if you want the job done it is a great start. 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.) . From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. is the m4 feedramp common in barrel extensions? 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. -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! Change the angle so that the ramp ends at the exact same point. Go back to writing school. Then the manufacturer discontinued the barrel. BUT, I DO NOT TRUST MY LIFE TO THAT WEAPON. And that is the important thing! Use this M4 Barrel extention with M4 feedramps. The difference between standard feed ramps and M4 ramps is easy to see. Description. Caught a deal on a matched barrel and bolt. 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. 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. M4 extension with .350 M4 style feed ramps 11 Degree Target Crown Threaded Muzzle 5/8"x24 TPI Weight: 26.5 ounces 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. 3. Your link has been automatically embedded. 4. Should not be too hard. A forum community dedicated to drag racing drivers and enthusiasts. 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.