No feed ramps. . if you are OK with 3MOA, you might go 20,000 rounds! Will my A3 upper reciever work with my M4 barrel extention.According to some or your posts they will.Thanks Bill. The barrel blanks available are made from 416 Stainless Steel. 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 like all my guns to be reliable. Its easier to add feed ramps to the receiver not so easy to add them to the barrel extension. M4 ramps help in feeding in for carbine in full auto. This 20" BCM barrel is machined from SS410 stainless steel. I've been thinking about doing sort of an "Early Diemaco C8 carbine" clone build with a C7 style upper receiver. FN AR-15 5.56X45mm Nato . Notify me of follow-up comments by email. The barrel is supposed to have the M4 feed ramps. Interesting reading. Don't ever put non M4 ramped barrel on a M4 ramped upper receiver. BUT, I DO NOT TRUST MY LIFE TO THAT WEAPON. BUT if you find someone to grind your feed ramps and they do a good job, post it up and let us know. This has been my concern with modifying the aluminum parts. 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. All Rights Reserved. Finding the proper upper receiver is your best option. You have the option of barrel type, thread, fluting, finish type and to add a match bolt. Which Model Colt 1911 is For Me? Your previous content has been restored. An older-version (or A2-style) feed ramp is cut only on the barrel extension itself (top). $101.95. 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. The dimensions are different between the two, so theyd have to change some things to the feed ramps dimensions. This is one time it's better to go a little too far than to leave an edge for the . It has ran flawlessly (barring tuning of the gasblock when new) with several different brands of magazines and ammo. Well, over the course of 5,000 rounds at .40 a round, you spent two grand on ammo. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. Ideally both. That's an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. Powered by Invision Community, M4-style barrel extension with Rifle-type upper. Thanks for explaining the feed ramp topic in a couple of different ways. This can lead to a rare but odd situation; barrel and receiver mismatch. In this episode of Gun Stock Reviews, we look at the difference between M4 Ramps and the old standard ramps of the past. And that the M4s and M4A1s are issued M855 which has a slight difference in bullet shape vs. the older 55gr M193 BALL. Little polish. 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 too built a .458 SOCOM carbine . If you ever have an issue, then look at getting a correct barrel for the upper. 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. The barrels also had to be modified. 3. As a result, the factory machined M4 feed ramps on the receiver are hard coat anodized which adds significant strength to the aluminum. The M4 ramps, if I am not mistaken, were originally made to help reduce malfunctions on the M4 carbine. Load a magazine with two or three rounds, lock the bolt group back on your rifle or carbine and insert the magazine. this is the barrel designed and profiled for the Mark 12 Mod 0 uppers and rifles. Now, theres nothing wrong at all with a little polish on any and all feed ramps, which can not only be done fairly easily, it can be successfully done by most at home. M4 Feed ramps on barrel extensions are a solid example. I checked what I have now. The mil actually only specs M4 feed ramps for use in its M4s. I would just make sure to order rifle upper with rifle barrel extension or M4 upper with M4 barrel extension. Factory said its fine . 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. 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 cant advise on that one folks. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. With a larger diameter case body sitting down in the magazine, the tip of the bullet sits lower in relation to the chamber/bore centerline than with a .223-size round. Then the manufacturer discontinued the barrel. Related: If you are using a Ar rifle, best green laser sight is good choice for hunting. The angle is going to be key, alot of people attempt to mimic the angle of the barrel feed ramps, this is incorrect. 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. 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. http://www.ar15fornoobs.com/wp-content/uploads/feedramps.jpg. again, Thanks. Shorter length equates to much higher pressure in the upper receiver. so im thinking I might as well just get the unramp upper. The last is using the best and right ammo for the job. I suggest you get a rifle receiver. Looking for a black stripped A1 upper with non m4 feed ramps (just realized the upper I have wont work with my barrel). Absolutely nothing to do with casing diameter, or whatever other weird sht you guys imagine. I'm lookin for a clear definition as to what they are, and what they do to enhance a given rifle's performance? For a better experience, please enable JavaScript in your browser before proceeding. Seems M4 is all the rage these days. For someone who is new at trying to understand feed ramps it helps to read a couple different explanations. I've seen that pic, it is a good reference. Feeds flawlessly. Feed ramps on barrel extensions are a good example. You cannot paste images directly. 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 The photo shows the dents and the bolt lugs line up perfectly. By the time you made it work you spent more time, money, and effort than if you just bought a new barrel or upper. I can assure you that most mods that deviate from the original design aren't 100% reliable. M4 Barrel Extension (M4 Feedramps) $22.95 (4 reviews) SKU: Barrel-Extension-M4 Stock Status: Quantity: Add to Wish List Description For your AR15, M16, M4. Create an account to follow your favorite communities and start taking part in conversations. #2. instead of mil-spec. 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. Does it make a big difference? i have the rifle barrel. Seems counter intuitive to recommend an M4 cut upper, especially if the barrel Im looking at has the rifle feed ramp (not M4 cut). Sorta. practical_man M16's fed pretty well before the M4 feed ramps were introduced. 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 And it appears that the bolt is slamming into the top of the bullet. Damaged Ak front end Barrel in Trunnion with or without sight bases. In military situations, it is advantageous for rifles to function with damaged, worn, or less than ideally serviceable magazines. Watch a video about our Modern Series AR barrel: Single Action and Double Action Which One Is Better For You? Some argue that, factually, its a step to enable a smoother feeding. 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. Copyright 2016 - 2023 by AdventureFootstep.com. Amazing what happens in a thread over a simple question. I think your mistaking that with adding ramps to the receiver. pm me at BOG or PG, or get in touch with my number 09177542777 if you're interested. If your upper isn't showing signs of bullets rubbing on the aluminum under the barrel extension, you should be good with M4 ramps. Those ramps line up with the barrel, which are cut deeper than on a rifle barrel. Insert the barrel and sharpie the cut area, then use the right bit on a dremel. They are also 1/7 twist, 4150 steel, chrome lined, and button rifled like the real deal! Paste as plain text instead, What is the difference between Modern, Performance, and Premium Series Barrels? By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. M4 Feed ramps on barrel extensions are a solid example. All things being equal and having used both weapons extensively, Id rather have the feed Ramps. 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. That puts the cartridge in a position where the extended feed ramp improves the breech-loading design. 3. Polishing the edges of the chamber mouth to remove the edges of that chamfer will. You absolutely do not want it the other way around however. In case My barrel is rifle ramp it won't be so bad after all. Don't forget read more information about it here! These units actually feature the NON-F-Marked (correct) front sight base. Whether they materialize or not depends on the direction of the mismatch. Do you have an AR barrel or feed ramp tip? Use this M4 Barrel extention with M4 feedramps. By The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. Previous. And that is the important thing! A couple of times I ended up with the OK set up from the picture above. Was sort of worried about how it would run with an 11.5" barrel and mismatched ramps, but it sounds like it should be good to go either way. For a better experience, please enable JavaScript in your browser before proceeding. Can someone recommend or point me in the right direction of a good quality upper receiver for an SPR build that does not have M4 feed ramp cuts in it? My alternative plan is to do exactly as you describe. 410 stainless is also harder and more corrosion resistant than conventional 416 stainless found in other commercially available precision barrels. Some barrels I see for sale say they include M4 feed ramps, and some uppers say they include them too. Metal cases ammunition such as Wolf through an M4 clone? In most cases the ramps only help during full auto mode while cycling at a high rate. When I function tested it the first time with live half-jacketed rounds I had the worst FTF jam I have ever experienced. BrianEnos.com The extension is the part at the end of the barrel that fits inside the upper. Some gun owners believe that the M4 ramps can help for some of the larger-diameter cartridges in use. M4 extension with .350 M4 style feed ramps 11 Degree Target Crown Threaded Muzzle 5/8"x24 TPI Weight: 26.5 ounces 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. So, what is the difference between M4 feed ramps and regular ones? I will check with compass lake. 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. Questions on how to install your new BA barrel? From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. Go slow and you'll be done in no time. The Bullet ~ Handguns, Rifles and Shotguns, http://thearguys.com/ar-facts/m4-feed-ramps/. Clear editor. The closest brand new barrel you are likely to find is the Windham Weaponry 20 inch 1/7 twist chrome lined barrel. Site towers are not "F" marked SPECS: Length- 14.5". You need to match up barrels to receivers for optimum performance. 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. That is what I tell people when they try to convince me that they need a stainless barrel instead of chrome-moly. 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. I bought a .458 upper to go with it, with the extra internal clearance cut before anodizing. If your mag catch is at Spec height, you should not have a problem with an M4 cut barrel in a rifle receiver. With the increased use of larger-diameter cased cartridges, the M4 feed ramps are proving their values when using them in those cartridges. - 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. 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. i have an extra brand new M4 barrel extension ramp to replace a rifle ramp. If you have an account, sign in now to post with your account. Edited April 27, 2014 by Mark Gale Does NOT include pin Press question mark to learn the rest of the keyboard shortcuts. No need to alter the upper. 2. 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. Some suggest taking a grinder to the extension area. Barrel customizations are also available. It was in the last few issues of SAR. What is an m4 feed ramp? Should not be too hard. When carrying out feed ramp polishing, it is crucial to prioritize the frame's angles, which is a critical part of the feed ramp. Press J to jump to the feed. There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. Its not a big deal but still an important thing to remember and understand. I found the article very informative. upper recievers and barrels are hard to comeby. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. All NFA rules apply. 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. 16" Pre-Ban M4 Profile Barrel Assembly CARBINE Gas System About Upper assembly comes completely head spaced and test fired. so it is better to have an upper reciever that's designed for non-m4 feed ramps since you can put in standard barrels right? This is why you can use a barrel with an extension with M4 feedramps with a receiver that does not have feedramps, but you cannot use a receiver with M4 feedramps with a barrel with an extension with rifle feedramps. The M4, and the CAR-15, before it have had similar problems like the ones you mentioned. 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. However, its rare now to find an upper receiver or a ready-to-go barrel that doesnt have the M4 cuts. It's going to a gunsmith to be shortened and rethreaded anyways, can they just grind/polish the feed ramps to match or is it more involved than that? Oh well, as I tell my lovely and understanding bride, guns are relatively free. it's the ammo and training that cost real money. 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. Looking to spend $180-250 (depending on condition, forge mark and if a rear sight is included or not.) So, an M4 feed ramp includes the barrel extension and the upper. 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. 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. M16s and M16-A1s run at 750 rounds per minute in full auto. So I called. I've seen several places say you just need a 1/8" chainsaw sharpening bit and a Dremel to fix it. The barrel Throat is the second most critical component after angles and should be polished with utmost care. Only took a few minutes. Is one better than the other? Rifles, Uppers, Lowers, Barrels, and more, [ARCHIVED THREAD] - Rifle vs m4 feed ramps, http://i135.photobucket.com/albums/q125/PursuitSS/Postings%20photos/c0d26170b75c3e6f9ea65a7d0862247e.jpg. and add them to non-m4 barrels.? 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. There is a picture of the various options, hopefully another poster can link them. Check often for fit. Looking For Bear Creek Arsenal Barrels Review? I will attest that a rifle upper and a barrel with the M4 feedramps works just fine. They are better! It is milled out of 6061 T6. All we do is dremmel it to match - we dont remove it and grind to any specific angle. can you buy feed ramps individually? The rifle-platform M16s dont use them. pictures would help. Hasn't misfed yet, through initial break in up through 1k rounds, and that's mag length ammo. Come join the discussion about racing, builds, pro mods, hot rods, events, turbos, nitrous, superchargers, and more! It's best to have M4 ramps on both the upper and barrel. M4 16", SBN, 1:7, 5.56 NATO Barrel Specifications: - Caliber: 5.56 NATO (.223 REM) - Gas Tube: Car Add to Cart. Backing up a ton: Any and all AR-15 barrel extensions have feed ramps. I'm assuming that you only need the ramps from one or the other. For use by barrel manufacturers. FFL Fax: 866-721-8691. /r/ar15 is here for your favorite black gun links, build pics, questions and other tactical or practical information. Mil-spec is good for the masses, and if you want the job done it is a great start. Try this little exercise: 1. 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. A feed ramp is a basic feature of many breech loading cartridge firearm designs. 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. By well.. it's kinda hard to get stuff in this part of the world. 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! Change the angle so that the ramp ends at the exact same point. 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.
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