11.5", SBN, 1:7, 5.56 NATO Barrel hey bro nice to see you here!!! 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. Installing a Luth-AR Rifle Buffer Tube and an A2 Stock #1041. You can post now and register later. Upper Receiver WITHOUT M4 Feed Ramp Cuts? - Sniper's Hide Forum But, as with anything else, this work can go too far. Everything that you have on your side to make any weapons more reliable and work when it absolutely needs to is a plus. The mil actually only specs M4 feed ramps for use in its M4s. I didn't forsee that we'd ever see the day when replacement parts would be so hard to get. And that the M4s and M4A1s are issued M855 which has a slight difference in bullet shape vs. the older 55gr M193 BALL. Gun smith said , not head spaced properly. Thread: Adding M4 feedramps to A1/C7 upper. Amazing what happens in a thread over a simple question. BCM 14.5" MK2 Upper (Standard) w/ 13" MLOK Handguard - FDE AR Tech Tip - Checking M4 Ramps for overhang - YouTube 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. Modify AR15 A2 barrel extension for M4 feed ramp? Whether they materialize or not depends on the direction of the mismatch. I wouldn't be concerned at all with any wear after modifying an upper receiver. In most cases the ramps only help during full auto mode while cycling at a high rate. Costs about $40-50 to have the feed ramps reprofiled from what I can gather. That puts the cartridge in a position where the extended feed ramp improves the breech-loading design. The ramps on the regular rifle-type extension are cut just to the edge of the extension. When you need to nail something you use a hammer not a wrench. The manufacturer said they had sold hundreds of barrels with out problems reported. This Kit is made to cut or polish the STEEL Feed Ramps on your Barrel Extension ONLY. i have an extra brand new M4 barrel extension ramp to replace a rifle ramp. 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! upper recievers and barrels are hard to comeby. Buy AR 15 16" .350 Legend Nitride M4 Profile Barrel 1:16: GunBroker is the largest seller of AR15 Parts Gun Parts All: 974000728 . My experience with ARs is all A-1s. I picked up a side charging upper from Sundevil last year. I found the article very informative. 's blog. Its a miracle! Proper maintenance and lubrication. Most work performed while-you-wait, evening and saturday appointments available. 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. Feed Ramps -300BlkTalk Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. and add them to non-m4 barrels.? The Differences Between an M4 and an AR15 - Music Raiser The best case is to have both an upper and barrel that have the feed ramps. 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. All Rights Reserved. Full M4 feed ramps are on both the upper and barrel extension. Your link has been automatically embedded. 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. Little polish. Does anyone have a follow up that confirms or denies my claim? Good call. Then you can get a regular rifle barrel for the upper with no ramps. Metal cases ammunition such as Wolf through an M4 clone? If I have a rifle ramp upper and get the barrel later and coincidentally will have an m4 ramp. CUTTING M4 RAMPS - YouTube pm me at BOG or PG, or get in touch with my number 09177542777 if you're interested. Check often for fit. Do you have an AR barrel or feed ramp tip? Jams and misfires. AR15 20 inch Upper Receiver Group (SS) w/ Handguard | BCM 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. Sorta. You can put a M4 barrel and non-M4 receiver together, but you can't mismatch them the other way. What is an m4 feed ramp? Semi autos run slower than full autos. There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. I like getting another Upper idea then you could end up with two rifles! I will attest that a rifle upper and a barrel with the M4 feedramps works just fine. Editors Note: This article was originally published in January of 2019. Insert the barrel and sharpie the cut area, then use the right bit on a dremel. Use this M4 Barrel extention with M4 feedramps. 14.5" M4 SOCOM Barrel Assembly with Sight Tower - Brownells By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. 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 Anything else you want to share about M4 clones would be appreciated, especially when it comes to a reliable rifle. After two months of back and forth, cleaned up the feed ramps. The best case is to have both an upper and barrel that have the feed ramps. 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. For instance I was looking at the BCM upper receiver, and it said it had M4 feed ramps machined into the upper. I have a 723 build (w/ C7 upper) and a 727 build (A2 upper) that use 14.5" Colt M4 barrels. April 23, 2014 in Rifle - Technical. Rifles, Uppers, Lowers, Barrels, and more, [ARCHIVED THREAD] - Rifle vs m4 feed ramps, http://i135.photobucket.com/albums/q125/PursuitSS/Postings%20photos/c0d26170b75c3e6f9ea65a7d0862247e.jpg. Damaged Ak front end Barrel in Trunnion with or without sight bases. Earlfillmore 13 hr. I am having a tough time finding an in-stock barrel (18 or 20 incher) with a rifle extension on it. All NFA rules apply. 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. How to Clone the M16A2 Rifle - The New Rifleman Barrel customizations are also available. So, an M4 feed ramp includes the barrel extension and the upper. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. So the engineers lowered the feed rampa into the receiver. By Yamil Sued August 6, 2021. 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. All uppers are assembled cleaned and tested before shipping. Would not feed to save its life! There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. Clear editor. Given that most of us dont always have perfect access to truly genuine Mil-Spec, mil-standard parts (those actually used in issued fighting tools), were shopping based on a little part trust and a bigger part knowledge. The good idea is that the round, presented at a lower plane, will contact other lower feed ramps and go right on in. Hasn't misfed yet, through initial break in up through 1k rounds, and that's mag length ammo. Edited April 27, 2014 by Mark Gale Copyright 2016 - 2023 by AdventureFootstep.com. It's best to have M4 ramps on both the upper and barrel. Lol. Some barrels I see for sale say they include M4 feed ramps, and some uppers say they include them too. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. 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. AAC and anybody else that has any reasonable expectation of quality and reliability use an M4 feed ramp. I read in Bravo company that there are 2 kinds of flat top upper. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Then the manufacturer discontinued the barrel. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. The closest brand new barrel you are likely to find is the Windham Weaponry 20 inch 1/7 twist chrome lined barrel. Go back to writing school. I just need a little guidance on this and I'm having trouble getting good results from Google. Please be respectful of others. I had seen these pix years ago and dismissed the idea of mix and match. You will be able to leave a comment after signing in, AR15Armory.com Paste as plain text instead, I've seen several places say you just need a 1/8" chainsaw sharpening bit and a Dremel to fix it. 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. You absolutely do not want it the other way around however. How to Polish a Feedramp Quick and Easy | Firearms Talk M4 16", SBN, 1:7, 5.56 NATO Barrel Specifications: - Caliber: 5.56 NATO (.223 REM) - Gas Tube: Car Add to Cart. Other selections are available for upper, bolt and carrier, charging handle, handguards, flash hiders, and gas blocks. [WTB] Black A1 carry handle upper NON-m4 feed ramp $200 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). Just put it in and shoot it. AR9 - Help diagnosing feeding issue. I recently built an AR9 (Glock Mags) that has been running flawlessly for about 3-400rds. Bullets tend to bump, snag, and stub on these guns. The A2's are pretty reliable guns, but trashed mags can cause them to have malfunctions also. Contents: 1 Diamond Burr (For Colt 2 Stage Ramps) 1 Cut Lube (For Diamond Burr) 1 Bullet Stone (For Reshaping . 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. LanceRiley, We reserve the right to edit as appropriate, delete profane, harassing, abusive and spam comments or posts, and block repeat offenders. 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. Founded by Frank Galli in 2000, Snipers Hide has been offering informational videos, podcasts, and other support to its users in one location. 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. Change the angle so that the ramp ends at the exact same point. Its also recommended you polish the ramps once youve achieved the appropriate angle. These units actually feature the NON-F-Marked (correct) front sight base. Read Now. 6.5 Grendel Type 2 | 16" Black Nitride | 1:8 Twist Carbine Length Gas I use it for hunting dogs only. Which Model Colt 1911 is For Me? You are using an out of date browser. Ar-15 Manufacturers Should Be Avoided: Which Should You Buy? You need to match up barrels to receivers for optimum performance. AR9 - Help diagnosing feeding issue - Calguns.net Its highly recommended to put any AR-platform firearm together with a matching M4 barrel extension and upper receiver set. Not saying a really good gunsmith cant do it, just that theres a bit of an involved process. The dimensions are different between the two, so theyd have to change some things to the feed ramps dimensions. Caught a deal on a matched barrel and bolt. You cannot paste images directly. The M4 was the first (allegedy) carbine length gas system. For the purposes of this chapter, we'll call the new one the M4, and the old one the AR. 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. Is it kosher to add M4 feed ramps to a standard upper to match an m4 ramped barrel? The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. 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. How long your barrel "lasts" depends on what your accuracy threshold is before you decide it is too bad to keep using. If it's happening regularly, check the magazines you are using for serviceability. You have the option of barrel type, thread, fluting, finish type and to add a match bolt. 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. The angle is going to be key, alot of people attempt to mimic the angle of the barrel feed ramps, this is incorrect. 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. I cant advise on that one folks. 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. You wrote that much to make a point that should have taken about 100 words? The barrel Throat is the second most critical component after angles and should be polished with utmost care. The Mission of Cheaper Than Dirt! 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. Is it worth the extra 50 bucks?" Try this little exercise: 1. BrianEnos.com M4 Feed ramps on barrel extensions are a solid example. "It will last 5k rounds instead of 4k. Any use of this content without express written consent is prohibited. You have a rifle barrel. For those who have actually done it will a new barrel with the M4 feed ramp extension function properly with an old school rifle-type upper receiver? Ideally both. which is bad combo. Issues can arise when receivers and barrel extensions are mismatched. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. Im an old vet, now retired and looking to build some ARs as a hobby to keep me doing something that I will enjoy. One new winner* is announced every week! http://www.ar15fornoobs.com/wp-content/uploads/feedramps.jpg. Our 6mm ARC barrel come standard with 1-7.5 Twist, M4 Feed Ramps and gas tube. Is one better than the other? I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. I've modified barrel/receivers even before M4 cuts came out and done some receivers when the barrels had cuts. 4. again, Thanks. This is a big tip, by the way, for pistol-caliber ARs. is the m4 feedramp common in barrel extensions? No feed ramps. 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 pictures would help. An older-version (or A2-style) feed ramp is cut only on the barrel extension itself (top). Looking for a black stripped A1 upper with non m4 feed ramps (just realized the upper I have wont work with my barrel). 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. Rear side of a CZ-75B pistol barrel showing the (here dirty) feed ramp. Forged 7075-T6 aluminum is harder than a bulls balls. ago KrinkyDink2 9 hr. 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. 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 Pasted as rich text. M4 feed ramps are not an original design, they were designed for the M4 In fact, the . The information provided here does not represent the views of Cheaper Than Dirt! I'll probably build a pistol out of this one. PSA PA-15 16"M4 Phosphate 5.56 NATO 1/7 Classic AR-15 Rifle with 13.5"M Load a magazine with two or three rounds, lock the bolt group back on your rifle or carbine and insert the magazine. A couple of times I ended up with the OK set up from the picture above. Avoid Polishing Too Lightly Or Too Roughly Its easier to add feed ramps to the receiver not so easy to add them to the barrel extension. M16's fed pretty well before the M4 feed ramps were introduced. FN AR-15 5.56X45mm Nato 14.70" M4 Profile Barrel Carbine Length Gas Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? Add M4 cuts to Barrel Ext $15.00 We can modify your rifle extension to match the M4 cuts in an upper receiver. They provide a lower, wider, and smoother entry for any round of ammo, whether its necessary or not. Cutting M4 feed ramps - Calguns.net For new construction barrels only. And it appears that the bolt is slamming into the top of the bullet. 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. EDIT: Okay, I understand now! Feeds flawlessly. I recommend putting any AR-platform firearm together with a matched M4 barrel extension and upper receiver set, just because you can. All Rights Reserved. The only other time it seems to help is if the mag is feeding the rounds with the bullet slightly angled lower than normal. 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!