Insert the barrel and sharpie the cut area, then use the right bit on a dremel. This is a big tip, by the way, for pistol-caliber ARs. Does anyone have a follow up that confirms or denies my claim? Feels like a silly question now that it makes sense. Proper maintenance and lubrication. 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. To measure just where the round makes impact on the feed ramps, I did not use any sort of micrometer to measure. Full M4 feed ramps start on the upper and continue onto the barrel extension. Guess what? 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). 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. Powered by Invision Community, M4-style barrel extension with Rifle-type upper. ago Costs about $40-50 to have the feed ramps reprofiled from what I can gather. I didnt think anything about it having M4 feed 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. 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). The parts are interchangeable. Only took a few minutes. I suggest you get a rifle receiver. It has ran flawlessly (barring tuning of the gasblock when new) with several different brands of magazines and ammo. are all barrels w/ m4 feed ramps?? 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. 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 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. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. again, Thanks. Thanks! Pasted as rich text. 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 Copyright 1996-2023 AR15.COM LLC. The photo shows the dents and the bolt lugs line up perfectly. 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. JavaScript is disabled. The M4 receiver feed ramps are cut at a steeper angle and, as a result, extend down into the receiver wall. Home Firearms Figuring Out Feed Ramps. They . Description Genuine 14.5" SOCOM, carbine length gas system barrel from Colt. This has been my concern with modifying the aluminum parts. Press J to jump to the feed. Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? The only one I found is LaRue's upper, but it won't work with the hand guard I'm using (Geissele MKIII). Description. The upper is designed to have two levels of top rails for mounting of night vision in front of scopes. 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. 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. Well, over the course of 5,000 rounds at .40 a round, you spent two grand on ammo. 30 cal. 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. M4 Feed ramps on barrel extensions are a solid example. If you have an account, sign in now to post with your account. . We reserve the right to edit as appropriate, delete profane, harassing, abusive and spam comments or posts, and block repeat offenders. By Yamil Sued August 6, 2021. Feed ramps on barrel extensions are a good example. There's a 7 degree difference between standard and M4 ramps. They provide a lower, wider, and smoother entry for any round of ammo, whether its necessary or not. Everything that you have on your side to make any weapons more reliable and work when it absolutely needs to is a plus. "C" stamp and CAGE code available. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. M4 barrel to non M4 receiver is fine, but not the other way around. It's best to have M4 ramps on both the upper and barrel. Experts advise on 31 degrees+30 minus-zip. 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. By the time you made it work you spent more time, money, and effort than if you just bought a new barrel or upper. Does it make a big difference? VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. I'd get jams from bullets hitting the back of the upper so I took a small round file and made the M4 ramps in the upper. 2. Its highly recommended to put any AR-platform firearm together with a matching M4 barrel extension and upper receiver set. M4 feed ramps. 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. Any body need a anchor for a very small boat? FFL Fax: 866-721-8691. Which Model Colt 1911 is For Me? 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. The barrel extension and the receiver both have to have the cuts. All comments are held for moderation and will appear after approval. As suggested, its best to match the upper and barrel extension no worries that way. Rear side of a CZ-75B pistol barrel showing the (here dirty) feed ramp. M16's fed pretty well before the M4 feed ramps were introduced. Reddit and its partners use cookies and similar technologies to provide you with a better experience. Then the manufacturer discontinued the barrel. My experience with ARs is all A-1s. So I'm working on my first build, and I'm a little confused. I wouldn't be concerned at all with any wear after modifying an upper receiver. 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. 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-. 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. 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.) . 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. 5. Display as a link instead, I've seen uppers with and without anodizing on M4 ramps . it seems to me to be about 50/50 with and without. Absolutely nothing to do with casing diameter, or whatever other weird sht you guys imagine. Go back to writing school. Seems counter intuitive to recommend an M4 cut upper, especially if the barrel Im looking at has the rifle feed ramp (not M4 cut). 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. Installing a Luth-AR Rifle Buffer Tube and an A2 Stock #1041. My alternative plan is to do exactly as you describe. On AR9's, I understand the distance between the Mag Follower and the Feed Ramp is a known complication in the design. Good call. Just because you can, doesn't mean you should. All things being equal and having used both weapons extensively, Id rather have the feed Ramps. I have a 723 build (w/ C7 upper) and a 727 build (A2 upper) that use 14.5" Colt M4 barrels. $101.95. Rifles, Uppers, Lowers, Barrels, and more, [ARCHIVED THREAD] - Rifle vs m4 feed ramps, http://i135.photobucket.com/albums/q125/PursuitSS/Postings%20photos/c0d26170b75c3e6f9ea65a7d0862247e.jpg. can you buy feed ramps individually? Thread: Adding M4 feedramps to A1/C7 upper. You want them to match. But, as with anything else, this work can go too far. Some barrels I see for sale say they include M4 feed ramps, and some uppers say they include them too. An older-version (or A2-style) feed ramp is cut only on the barrel extension itself (top). It was in the last few issues of SAR. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. Your email address will not be published. The only other time it seems to help is if the mag is feeding the rounds with the bullet slightly angled lower than normal. The good idea is that the round, presented at a lower plane, will contact other lower feed ramps and go right on in. All Rights Reserved. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. BUT if you find someone to grind your feed ramps and they do a good job, post it up and let us know. I'm assuming that you only need the ramps from one or the other. The barrel is supposed to have the M4 feed ramps. Should not be too hard. 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. EDIT: Okay, I understand now! Looking to spend $180-250 (depending on condition, forge mark and if a rear sight is included or not.) Watch a video about our Modern Series AR barrel: Here you can see an upper with "rifle" feedramps. Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? 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. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. instead of mil-spec. The best case is to have both an upper and barrel that have the feed ramps. What is the difference between Modern, Performance, and Premium Series Barrels? 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. 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. 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. DSA has fat top, Mueller, non feed ramp uppers for $40. I have looked and looked and looked. Bullets tend to bump, snag, and stub on these guns. With the increased use of larger-diameter cased cartridges, the M4 feed ramps are proving their values when using them in those cartridges. I found the article very informative. It's best to use rifle/rifle combo or M4/M4. Is getting it as part of the upper better? Would not feed to save its life! Create Account; Log Out ; Log In ; Wishlist 0; Shopping Cart 0; Home; About 50 bucks one way or the other on the barrel ain't squat! Then you can get a regular rifle barrel for the upper with no ramps. Product Description Surplus Colt 14.5" SOCOM, carbine length gas system barrel from Colt. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. Our 6mm ARC barrel come standard with 1-7.5 Twist, M4 Feed Ramps and gas tube. Change the angle so that the ramp ends at the exact same point. I will check with compass lake. Any use of this content without express written consent is prohibited. The angle is going to be key, alot of people attempt to mimic the angle of the barrel feed ramps, this is incorrect. There is a picture of the various options, hopefully another poster can link them. 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 . Avoid Polishing Too Lightly Or Too Roughly Thats an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. Some gun owners believe that the M4 ramps can help for some of the larger-diameter cartridges in use. *Must have a registered ARFCOM account to win. 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. Im an old vet, now retired and looking to build some ARs as a hobby to keep me doing something that I will enjoy. [ARCHIVED THREAD] - M4 feed ramp barrel in a non M4 ramp upper. practical_man In general, all you need to understand is that the M4 feed ramps include the barrel extension and upper receiver. The difference between standard feed ramps and M4 ramps is easy to see. 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 The tip of the cartridge rarely comes into contact with the upper receiver. 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. M16s and M16-A1s run at 750 rounds per minute in full auto. Amazing what happens in a thread over a simple question. Anything else you want to share about M4 clones would be appreciated, especially when it comes to a reliable rifle. 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). No need to alter the upper. 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! Featuring hand lapped 1/8 twist rate button rifling and M4 feed ramps barrel extensions, the 410 stainless barrel gives the shooter the best balance of weight and accuracy. 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. When you need to nail something you use a hammer not a wrench. By Barrel, sight and trigger work on most pistols and shotguns. Editors Note: This article was originally published in January of 2019. Press question mark to learn the rest of the keyboard shortcuts. They are better! 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. Add 3% to the total cost for credit card purchases. 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. So, lets glide down these lines below to erase your misconceptions about them. Notice how the ramp starts on the barrel extension and not in the receiver. First of Im not a gunsmith or firearms professional. I wont buy a barrel that isnt a wylde 223 556 but Im only now noticing. This USGI modification was done to both the barrel extension and the upper receiver, creating a longer and steeper feed ramp. Try this little exercise: 1. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Owning Best Ruger SR9c Accessories Can Change Your Life. Sent back again. The information provided here does not represent the views of Cheaper Than Dirt! That's an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. Barrels are Douglas 416 stainless steel with 1-7 twist with M4 feed ramps I am having a tough time finding an in-stock barrel (18 or 20 incher) with a rifle extension on it. I notice that's a Gibbz (or Gibbz-type) upper. If you don't clean it but demand 3/4MOA you might get 1,500. Earlfillmore 13 hr. True, which is why they're not even needed in semi autos. So I called. 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. A couple of times I ended up with the OK set up from the picture above. I would just make sure to order rifle upper with rifle barrel extension or M4 upper with M4 barrel extension. Id just get one for that barrel and find a barrel with m4 extension for the upper you already have. Required fields are marked *. 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. Buy AR 15 16" .350 Legend Nitride M4 Profile Barrel 1:16: GunBroker is the largest seller of AR15 Parts Gun Parts All: 974000728 . Create an account to follow your favorite communities and start taking part in conversations. Clear editor. 16" Pre-Ban M4 Profile Barrel Assembly CARBINE Gas System About Upper assembly comes completely head spaced and test fired. All Rights Reserved. So, I had purchased a 458 upper. These units actually feature the NON-F-Marked (correct) front sight base. All we do is dremmel it to match - we dont remove it and grind to any specific angle. The Shooter's Log, is to provide informationnot opinionsto our customers and the shooting community. I put together a second AR9 that is having a feeding issue, even if using similar parts as the first one. On the other hand, I wouldn't consider them as a deal breaker, and they would not pass up a good deal with an upper only because it did not have them - the M4 feed ramps. When carrying out feed ramp polishing, it is crucial to prioritize the frame's angles, which is a critical part of the feed ramp. However, they do have M4 feed-ramps which is not clone correct. I just need a little guidance on this and I'm having trouble getting good results from Google. Add M4 cuts to Barrel Ext $15.00 We can modify your rifle extension to match the M4 cuts in an upper receiver. I'll probably build a pistol out of this one. Those ramps line up with the barrel, which are cut deeper than on a rifle barrel. While I've got everything apart, I'm thinking I just want to put an M4 barrel extension on. They aid in feeding the round into the chamber from the magazine more easily, which make uppers and barrel extension matched. Gun smith said , not head spaced properly. So, what is the difference between M4 feed ramps and regular ones? The barrel Throat is the second most critical component after angles and should be polished with utmost care. Anodized red parts. Is it kosher to add M4 feed ramps to a standard upper to match an m4 ramped barrel? 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. Any use of this content without express written consent is prohibited. For someone who is new at trying to understand feed ramps it helps to read a couple different explanations. The Fora platform includes forum software by XenForo. 2. pm me at BOG or PG, or get in touch with my number 09177542777 if you're interested. This gave it a longer point for the magazine to allow the rounds to come out of the magazine and feed into the chamber. For a better experience, please enable JavaScript in your browser before proceeding.