Its also recommended you polish the ramps once youve achieved the appropriate angle. 1 is a standard and the other for use with m4 feed ramp barrels. i have the rifle barrel. I notice that's a Gibbz (or Gibbz-type) upper. /r/ar15 is here for your favorite black gun links, build pics, questions and other tactical or practical information. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. pictures would help. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. I've seen several places say you just need a 1/8" chainsaw sharpening bit and a Dremel to fix it. Absolutely nothing to do with casing diameter, or whatever other weird sht you guys imagine. JavaScript is disabled. I too built a .458 SOCOM carbine . ago KrinkyDink2 9 hr. Little polish. Both. 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. 16" Pre-Ban M4 Profile Barrel Assembly CARBINE Gas System About Upper assembly comes completely head spaced and test fired. 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. Would not feed to save its life! They guide the bullet up and into the chamber. No feed ramps. -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! If you have a bolt that you would like to use you are welcome to ship it to us for accurate headspace. "C" stamp and CAGE code available. 2. The Fora platform includes forum software by XenForo. Interesting reading. Oh well, as I tell my lovely and understanding bride, guns are relatively free. it's the ammo and training that cost real money. One new winner* is announced every week! It may not display this or other websites correctly. I wouldn't be concerned at all with any wear after modifying an upper receiver. 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 It's best to use rifle/rifle combo or M4/M4. For use by barrel manufacturers. And that is the important thing! Everything that you have on your side to make any weapons more reliable and work when it absolutely needs to is a plus. Create Account; Log Out ; Log In ; Wishlist 0; Shopping Cart 0; Home; About This can lead to a rare but odd situation; barrel and receiver mismatch. Paste as plain text instead, again, Thanks. Clear editor. 's blog. I found the article very informative. Looking for a black stripped A1 upper with non m4 feed ramps (just realized the upper I have wont work with my barrel). The barrel Throat is the second most critical component after angles and should be polished with utmost care. 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. All NFA rules apply. What is the difference between Modern, Performance, and Premium Series Barrels? 308 m5 using m4 feed ramps, which I belive are for the smaller round like. The M-16/M4 are great weapons. They aid in feeding the round into the chamber from the magazine more easily, which make uppers and barrel extension matched. 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 Lol. The information provided here does not represent the views of Cheaper Than Dirt! In short, if you have a Dremmel you can do it yourself. AAC and anybody else that has any reasonable expectation of quality and reliability use an M4 feed ramp. Should not be too hard. Some suggest taking a grinder to the extension area. 5. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. 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. and add them to non-m4 barrels.? To conclude, the M4 feed ramps bring a lot of improvements to the AR-platform firearms. The A2's are pretty reliable guns, but trashed mags can cause them to have malfunctions also. 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.) . Hasn't misfed yet, through initial break in up through 1k rounds, and that's mag length ammo. Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? I have looked and looked and looked. 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. Thanks. Founded by Frank Galli in 2000, Snipers Hide has been offering informational videos, podcasts, and other support to its users in one location. Looking to spend $180-250 (depending on condition, forge mark and if a rear sight is included or not.) So, I had purchased a 458 upper. It is removeable with a special wrench and a barrel clamp/vise. Thread: Adding M4 feedramps to A1/C7 upper. As suggested, its best to match the upper and barrel extension no worries that way. A feed ramp is a basic feature of many breech loading cartridge firearm designs. I prefer them. 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. A closer look at uppers and barrel extensions. I don't have much to add re: feed ramps, but. Don't ever put non M4 ramped barrel on a M4 ramped upper receiver. FFL Fax: 866-721-8691. I've seen that pic, it is a good reference. FN AR-15 5.56X45mm Nato . M4 16", SBN, 1:7, 5.56 NATO Barrel Specifications: - Caliber: 5.56 NATO (.223 REM) - Gas Tube: Car Add to Cart. Create an account to follow your favorite communities and start taking part in conversations. All Rights Reserved. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. Modern Series Barrels. Product Details Douglas 18" Flat Dark Earth Cerakoted 416 stainless steel barrel with 1-7 twist and M4 feed ramps. 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. Im an old vet, now retired and looking to build some ARs as a hobby to keep me doing something that I will enjoy. 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. I like getting another Upper idea then you could end up with two rifles! You will be able to leave a comment after signing in, AR15Armory.com Your previous content has been restored. The barrel extension and the receiver both have to have the cuts. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. what I fear the most is having an m4 ramp upper and then getting a barrel with a rifle ramp. If you consider this article useful, share it with anyone in need! 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. Either way is good and both types work great with semi auto only guns. There's a 7 degree difference between standard and M4 ramps. Don't forget read more information about it here! Add 3% to the total cost for credit card purchases. The barrels also had to be modified. 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. If it's happening regularly, check the magazines you are using for serviceability. Watch a video about our Modern Series AR barrel: 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. The dimensions are different between the two, so theyd have to change some things to the feed ramps dimensions. Backing up a ton: Any and all AR-15 barrel extensions have feed ramps. Good call. http://www.ar15fornoobs.com/wp-content/uploads/feedramps.jpg. 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. Site towers are not "F" marked SPECS: Length- 14.5". So, an M4 feed ramp includes the barrel extension and the upper. 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 . Shorter length equates to much higher pressure in the upper receiver. Ready to drop onto a complete lower receiver. EDIT: Okay, I understand now! To measure just where the round makes impact on the feed ramps, I did not use any sort of micrometer to measure. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Owning Best Ruger SR9c Accessories Can Change Your Life. Seems like it should work to me, but be a real challenge to keep clean and be damned ugly to boot. The Bullet ~ Handguns, Rifles and Shotguns, http://thearguys.com/ar-facts/m4-feed-ramps/. Not all mil-spec features advertised on the product information are the real mil-specs. Its not a big deal but still an important thing to remember and understand. 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. 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. I am glad to know that I need to look for changes in design and the differences in the A2 and A4 feed ramp / rails. . 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. My alternative plan is to do exactly as you describe. Description. Press question mark to learn the rest of the keyboard shortcuts. That puts the cartridge in a position where the extended feed ramp improves the breech-loading design. You wrote that much to make a point that should have taken about 100 words? Looking For Bear Creek Arsenal Barrels Review? 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. Read Now. Powered by Invision Community. And that the M4s and M4A1s are issued M855 which has a slight difference in bullet shape vs. the older 55gr M193 BALL. All this basically means is that the ramps continue from the barrel extension down through the upper receiver tonthe magazine. Your email address will not be published. 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. You cannot paste images directly. This Kit is made to cut or polish the STEEL Feed Ramps on your Barrel Extension ONLY. 338 and others not the .308 76251 or 6.5 creedmore which o think should have a.30cal feed ramp.? I'll probably build a pistol out of this one. So I'm working on my first build, and I'm a little confused. The difference between standard feed ramps and M4 ramps is easy to see. You absolutely do not want it the other way around however. Feed ramps on barrel extensions are a good example. I didn't forsee that we'd ever see the day when replacement parts would be so hard to get. 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. The M4 style feed ramps and barrel extension provide consistent feeding and the matte black Manganese Phosphate finish resists external corrosion and oxidation. Notify me of follow-up comments by email. You want them to match. Ballistic Performance of Federal Punch .22 LR Ammunition with the Heritage Barkeep #1063. As they are becoming more and more a standard, and certainly do not do any harm to us. If you have an account, sign in now to post with your account. 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. M4 feed ramps. In military situations, it is advantageous for rifles to function with damaged, worn, or less than ideally serviceable magazines. Theres a bit more to it than just polishing. CARBON-15 Stripped Lower Receiver The manufacturer said they had sold hundreds of barrels with out problems reported. There is no way to make a carbine barrel extension out of a rifle barrel extension, period, full stop. Come join the discussion about racing, builds, pro mods, hot rods, events, turbos, nitrous, superchargers, and more! April 23, 2014 in Rifle - Technical. The extension is the part at the end of the barrel that fits inside the upper. The only one I found is LaRue's upper, but it won't work with the hand guard I'm using (Geissele MKIII). Copyright 1996-2023 AR15.COM LLC. It gives a longer ramp that is less steep into the chamber. But, as with anything else, this work can go too far. ago Costs about $40-50 to have the feed ramps reprofiled from what I can gather. Reliability is the main concern for me when I re-barrel this rifle. 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 So the engineers lowered the feed rampa into the receiver. I got my help from this thread, and thank you again to ORD. Feels like a silly question now that it makes sense. 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. 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. They are better! That's an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. Machined from 4150 Chrome Moly Vanadium Steel and feature a QPQ corrosion resistant finish and QPQ coated M4 feed ramp extension. However, they do have M4 feed-ramps which is not clone correct. - 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. One new winner* is announced every week! They provide a lower, wider, and smoother entry for any round of ammo, whether its necessary or not. 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. Brevity matters. I can assure you that most mods that deviate from the original design aren't 100% reliable. In case My barrel is rifle ramp it won't be so bad after all. 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! May 17, 2008 in The Armorer. However Ive built numerous ar15 and lr308 rifles and pistols. I think your mistaking that with adding ramps to the receiver. I am having a tough time finding an in-stock barrel (18 or 20 incher) with a rifle extension on it. I use it for hunting dogs only. AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. 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 Yamil Sued August 6, 2021. 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. 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. Powered by Invision Community, M4-style barrel extension with Rifle-type upper. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. are all barrels w/ m4 feed ramps?? 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. 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. I should have taken my own advice for once. So like ORD says it is entirely 100% possible and plenty of people do it, but I would rather not do any work to this perfect barrel. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. Previous. 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). Full M4 feed ramps are on both the upper and barrel extension. The tip of the cartridge rarely comes into contact with the upper receiver. All comments are held for moderation and will appear after approval. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. Well, over the course of 5,000 rounds at .40 a round, you spent two grand on ammo. If your upper isn't showing signs of bullets rubbing on the aluminum under the barrel extension, you should be good with M4 ramps. Barrel customizations are also available. The ramps are in the barrel extension. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. 2. What is an m4 feed ramp? Avoid Polishing Too Lightly Or Too Roughly All Rights Reserved. I checked what I have now. 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. Supposedly you'll only notice issues with rapid/auto fire with a configuration like this. aaargh.. that's the setup I hate to see. - The Shooter's Log, 2012 SHOT Show Special Report: Del-Ton TRX Rifle and More! Recommend using a gunsmith this route too if you are not comfortable. Higher pressure equte to parts (bcg, buffer, buffer spring, ROUNDS, etc) experiencing much higher wear/tear. Try this little exercise: 1. Amazing what happens in a thread over a simple question. Some argue that, factually, its a step to enable a smoother feeding. upper recievers and barrels are hard to comeby. Installing a Luth-AR Rifle Buffer Tube and an A2 Stock #1041. After two months of back and forth, cleaned up the feed ramps. They offer a lower, more extensive, and smoother entry for any round of ammo, whether its necessary or not. Press question mark to learn the rest of the keyboard shortcuts. On AR9's, I understand the distance between the Mag Follower and the Feed Ramp is a known complication in the design. 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. 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. The mil actually only specs M4 feed ramps for use in its M4s. Costs about $40-50 to have the feed ramps reprofiled from what I can gather. Only took a few minutes. what does it do?? Insert the barrel and sharpie the cut area, then use the right bit on a dremel. For someone who is new at trying to understand feed ramps it helps to read a couple different explanations. Semi autos run slower than full autos. Remember less is more, little by little. He had more to say and added some more engineer and gun designer speak too.

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