adding m4 feed ramps to barrel

M4 barrel to non M4 receiver is fine, but not the other way around. This USGI modification was done to both the barrel extension and the upper receiver, creating a longer and steeper feed ramp. 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. 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. I just need a little guidance on this and I'm having trouble getting good results from Google. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. No feed ramps. I would just make sure to order rifle upper with rifle barrel extension or M4 upper with M4 barrel extension. 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. Some suggest taking a grinder to the extension area. 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). I should have taken my own advice for once. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. 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 you ever have an issue, then look at getting a correct barrel for the upper. ago Costs about $40-50 to have the feed ramps reprofiled from what I can gather. Sorta. I've modified barrel/receivers even before M4 cuts came out and done some receivers when the barrels had cuts. 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. Description Genuine 14.5" SOCOM, carbine length gas system barrel from Colt. 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. [ARCHIVED THREAD] - M4 feed ramp barrel in a non M4 ramp upper. Powered by Invision Community, M4-style barrel extension with Rifle-type upper. All Rights Reserved. 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 . I found the article very informative. Thread: Adding M4 feedramps to A1/C7 upper. Recommend using a gunsmith this route too if you are not comfortable. The manufacturer said they had sold hundreds of barrels with out problems reported. 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. Insert the barrel and sharpie the cut area, then use the right bit on a dremel. The ramp angles are different and changing the profile of the extension doesn't make it something it isn't. I would only add the feed ramps to the receiver if I had feeding issues, which you should not have. Share it in the comments section. again, Thanks. Product Details Douglas 18" Flat Dark Earth Cerakoted 416 stainless steel barrel with 1-7 twist and M4 feed ramps. Paste as plain text instead, Full M4 feed ramps start on the upper and continue onto the barrel extension. what I fear the most is having an m4 ramp upper and then getting a barrel with a rifle ramp. 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. Is one better than the other? AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. 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 and add them to non-m4 barrels.? In case My barrel is rifle ramp it won't be so bad after all. hey bro nice to see you here!!! Its highly recommended to put any AR-platform firearm together with a matching M4 barrel extension and upper receiver set. You need to match up barrels to receivers for optimum performance. 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. I think my question would be why rifle receiver+M4 barrel is just "ok" rather than "good", unless the point is that in a carbine-gas gun M4 ramps are just considered an improvement over no ramps. Ideally both. I can probably get the upper reciever first. 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. No need to alter the upper. Description. ago KrinkyDink2 9 hr. 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. And it appears that the bolt is slamming into the top of the bullet. I like all my guns to be reliable. I'd rather just pay the gunsmith to make it work than hunt down another barrel/upper if possible. Both. 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. Then the manufacturer discontinued the barrel. Full M4 feed ramps start on the upper and continue onto the barrel extension. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. By Full M4 feed ramps are on both the upper and barrel extension. What is an m4 feed ramp? 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 . Come join the discussion about racing, builds, pro mods, hot rods, events, turbos, nitrous, superchargers, and more! The tip of the cartridge rarely comes into contact with the upper receiver. 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. 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. It's best to use rifle/rifle combo or M4/M4. This can lead to a rare but odd situation; barrel and receiver mismatch. Don't forget read more information about it here! This space is for pictures of "retro" Stoner rifles and completed or partial retro AR-15 builds, as well as discussions about either. Barrels are Douglas 416 stainless steel with 1-7 twist with M4 feed ramps America's Ultimate Shooting Sports Discounter, Click to share on Facebook (Opens in new window), Click to share on Twitter (Opens in new window), Click to share on Pinterest (Opens in new window). Im an old vet, now retired and looking to build some ARs as a hobby to keep me doing something that I will enjoy. LanceRiley, They offer a lower, more extensive, and smoother entry for any round of ammo, whether its necessary or not. 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 As a result, the factory machined M4 feed ramps on the receiver are hard coat anodized which adds significant strength to the aluminum. Reddit and its partners use cookies and similar technologies to provide you with a better experience. 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. Will my A3 upper reciever work with my M4 barrel extention.According to some or your posts they will.Thanks Bill. Guess what? Jams and misfires. If your mag catch is at Spec height, you should not have a problem with an M4 cut barrel in a rifle receiver. 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-. 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. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. The good idea is that the round, presented at a lower plane, will contact other lower feed ramps and go right on in. I recently built an AR9 (Glock Mags) that has been running flawlessly for about 3-400rds. However the DD 14.5 are ideally meant to mate up with M4 style upper receiver feedramps. This 20" BCM barrel is machined from SS410 stainless steel. The M4 was the first (allegedy) carbine length gas system. Reddit and its partners use cookies and similar technologies to provide you with a better experience. I wont buy a barrel that isnt a wylde 223 556 but Im only now noticing. Oh well, as I tell my lovely and understanding bride, guns are relatively free. it's the ammo and training that cost real money. 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. upper recievers and barrels are hard to comeby. The M4 style feed ramps and barrel extension provide consistent feeding and the matte black Manganese Phosphate finish resists external corrosion and oxidation. 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. They aid in feeding the round into the chamber from the magazine more easily, which make uppers and barrel extension matched. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. Your link has been automatically embedded. When carrying out feed ramp polishing, it is crucial to prioritize the frame's angles, which is a critical part of the feed ramp. The best case is to have both an upper and barrel that have the feed ramps. For the purposes of this chapter, we'll call the new one the M4, and the old one the AR. So, what is the difference between M4 feed ramps and regular ones? "C" stamp and CAGE code available. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. They provide a lower, wider, and smoother entry for any round of ammo, whether its necessary or not. Just because you can, doesn't mean you should. 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. 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). Its not a big deal but still an important thing to remember and understand. All this basically means is that the ramps continue from the barrel extension down through the upper receiver tonthe magazine. from my service in the 70s to my personal weapons, all of my ARs are early 1970 slab sided Colt SP1s. He had more to say and added some more engineer and gun designer speak too. The ramps on the regular rifle-type extension are cut just to the edge of the extension. That puts the cartridge in a position where the extended feed ramp improves the breech-loading design. I picked up a side charging upper from Sundevil last year. Thank you for answering the question do well. There's a 7 degree difference between standard and M4 ramps. $101.95. The Fora platform includes forum software by XenForo. In most cases the ramps only help during full auto mode while cycling at a high rate. In short, if you have a Dremmel you can do it yourself. Should not be too hard. Other selections are available for upper, bolt and carrier, charging handle, handguards, flash hiders, and gas blocks. If you have a m4 ramped upper but not barrel you can cause problems as there's a lip of steel barrel extension in the way that can cause feeding problems. The barrels also had to be modified. Is it worth the extra 50 bucks?" 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. You want them to match. Gas block area is .750 diameter. The rifle-platform M16s dont use them. It's an interesting question. I'm a machinist in the aerospace industry and lucky enough to have. As they are becoming more and more a standard, and certainly do not do any harm to us. The Bullet ~ Handguns, Rifles and Shotguns, http://thearguys.com/ar-facts/m4-feed-ramps/. Is it kosher to add M4 feed ramps to a standard upper to match an m4 ramped barrel? 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. this is the barrel designed and profiled for the Mark 12 Mod 0 uppers and rifles. Anodized red parts. So I called. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Owning Best Ruger SR9c Accessories Can Change Your Life. Some barrels I see for sale say they include M4 feed ramps, and some uppers say they include them too. Good call. By For instance I was looking at the BCM upper receiver, and it said it had M4 feed ramps machined into the upper. Our 6mm ARC barrel come standard with 1-7.5 Twist, M4 Feed Ramps and gas tube. For a better experience, please enable JavaScript in your browser before proceeding. The dimensions are different between the two, so theyd have to change some things to the feed ramps dimensions. . All comments are held for moderation and will appear after approval. 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. Contents: 1 Diamond Burr (For Colt 2 Stage Ramps) 1 Cut Lube (For Diamond Burr) 1 Bullet Stone (For Reshaping . The barrel blanks available are made from 416 Stainless Steel. 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. Press J to jump to the feed. I've seen uppers with and without anodizing on M4 ramps . it seems to me to be about 50/50 with and without. An older-version (or A2-style) feed ramp is cut only on the barrel extension itself (top). However Ive built numerous ar15 and lr308 rifles and pistols. M4 feed ramps will extend the barrel extension and the upper receiver. With the increased use of larger-diameter cased cartridges, the M4 feed ramps are proving their values when using them in those cartridges. 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. 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. Add 3% to the total cost for credit card purchases. 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. Notice how the ramp starts on the barrel extension and not in the receiver. I replaced the M4 feed ramp barrel with a monolithic feed ramp barrel and no more problems. 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. If you want precision, dont look to the mil-spec gun, look to the one that is popular in 3-gun competitions, at Thunder Ranch, etc. Avoid Polishing Too Lightly Or Too Roughly They are better! Interesting reading. You wrote that much to make a point that should have taken about 100 words? Higher pressure equte to parts (bcg, buffer, buffer spring, ROUNDS, etc) experiencing much higher wear/tear. 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. It was in the last few issues of SAR. What's the difference? VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. April 23, 2014 in Rifle - Technical. Does it make a big difference? Instead, I just loaded up each mag with two rounds, and pushed the rounds forward by hand until the tip of . 3. /r/ar15 is here for your favorite black gun links, build pics, questions and other tactical or practical information. For use by barrel manufacturers. I read in Bravo company that there are 2 kinds of flat top upper. Required fields are marked *. The best case is to have both an upper and barrel that have the 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. Display as a link instead, The information provided here does not represent the views of Cheaper Than Dirt! You absolutely do not want it the other way around however. Don't ever put non M4 ramped barrel on a M4 ramped upper receiver. 16" Pre-Ban M4 Profile Barrel Assembly CARBINE Gas System About Upper assembly comes completely head spaced and test fired. I have a non ramped barrel in a ramped upper, feeds fine. Polishing the edges of the chamber mouth to remove the edges of that chamfer will. I recently picked up a barrel that I thought had M4 feed ramps, but it doesn't line up with my M4 feed ramp upper. CARBON-15 Stripped Lower Receiver is the m4 feedramp common in barrel extensions? The Mission of Cheaper Than Dirt! So the engineers lowered the feed rampa into the receiver. I bought a .458 upper to go with it, with the extra internal clearance cut before anodizing. Either way is good and both types work great with semi auto only guns. Finding the proper upper receiver is your best option. Semi autos run slower than full autos. 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. After two months of back and forth, cleaned up the feed ramps. Edited April 27, 2014 by Mark Gale Regular feed ramps are cuts into the barrel extension only, which allows guiding the round into the chamber during loading, making them a fundamental feature of many breech-loading firearm designs. There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. Shorter length equates to much higher pressure in 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. 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. BUT if you find someone to grind your feed ramps and they do a good job, post it up and let us know. 338 and others not the .308 76251 or 6.5 creedmore which o think should have a.30cal feed ramp.? Feed ramps on barrel extensions are a good example. Most work performed while-you-wait, evening and saturday appointments available. I have looked and looked and looked. Barrel is medium SPR profiled barrel, threaded with a 1/2-28 thread for the AE brakes and collar. If I have a rifle ramp upper and get the barrel later and coincidentally will have an m4 ramp. pictures would help. They were not intended to be super long range man killers. I'm assuming that you only need the ramps from one or the other. This is one time it's better to go a little too far than to leave an edge for the . 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 parts are interchangeable. - 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. Anything else you want to share about M4 clones would be appreciated, especially when it comes to a reliable rifle. You cannot paste images directly. 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 first reason is that they are, indeed, better. You also repeated yourself. Most of barrel assemblies and upper receivers on the market now have a present of M4 feed ramps. Any use of this content without express written consent is prohibited. 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. Ballistic Performance of Federal Punch .22 LR Ammunition with the Heritage Barkeep #1063. 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 (theyre lowered).

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