AR15 Feed Ramp Cut & Polish Kit - School of the American Rifle When you purchase through links on our site, we may earn an affiliate commission, which supports our community. colt A1E1 733 uppers didn't have extended carbine feedramps ? 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. Home Firearms Figuring Out Feed Ramps. i have the rifle barrel. Barrel is medium SPR profiled barrel, threaded with a 1/2-28 thread for the AE brakes and collar. If a barrel comes with the feed ramps could I take them off? I wouldn't be concerned at all with any wear after modifying an upper receiver. can the barrel extension be bought individualy? Oh well, as I tell my lovely and understanding bride, guns are relatively free. it's the ammo and training that cost real money. 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. That's an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. After two months of back and forth, cleaned up the feed ramps. You also repeated yourself. Most of barrel assemblies and upper receivers on the market now have a present of M4 feed ramps. I'm planning on replacing my forearm with a Larue 13.5. How to Polish a Feedramp Quick and Easy | Firearms Talk The A2's are pretty reliable guns, but trashed mags can cause them to have malfunctions also. Go slow and you'll be done in no time. Sorta. However Ive built numerous ar15 and lr308 rifles and pistols. Press question mark to learn the rest of the keyboard shortcuts. All things being equal and having used both weapons extensively, Id rather have the feed Ramps. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. 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. Its also recommended you polish the ramps once youve achieved the appropriate angle. if you are OK with 3MOA, you might go 20,000 rounds! 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. I found the article very informative. AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. For new construction barrels only. You have the option of barrel type, thread, fluting, finish type and to add a match bolt. I will check with compass lake. But, as with anything else, this work can go too far. They are better! My experience with ARs is all A-1s. 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). Rear side of a CZ-75B pistol barrel showing the (here dirty) feed ramp. You need to match up barrels to receivers for optimum performance. 2. So, an M4 feed ramp includes the barrel extension and the upper. While I've got everything apart, I'm thinking I just want to put an M4 barrel extension on. Any body need a anchor for a very small boat? Is one better than the other? 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. 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. I should have taken my own advice for once. Looking for a black stripped A1 upper with non m4 feed ramps (just realized the upper I have wont work with my barrel). It's best to have M4 ramps on both the upper and barrel. CARBON-15 Stripped Lower Receiver Also, barrel life is relative. which is bad combo. Press J to jump to the feed. I like getting another Upper idea then you could end up with two rifles! As they are becoming more and more a standard, and certainly do not do any harm to us. 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 . I'll probably build a pistol out of this one. 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. can you buy feed ramps individually? This space is for pictures of "retro" Stoner rifles and completed or partial retro AR-15 builds, as well as discussions about either. - The Shooter's Log, 2012 SHOT Show Special Report: Del-Ton TRX Rifle and More! AR9 - Help diagnosing feeding issue. 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. 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. 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. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. RTS Bartlein: 6mm ARC 26" - Compass Lake Engineering, LLC Thats an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. 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 Editors Note: This article was originally published in January of 2019. Experts advise on 31 degrees+30 minus-zip. 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. They aid in feeding the round into the chamber from the magazine more easily, which make uppers and barrel extension matched. ago KrinkyDink2 9 hr. All Rights Reserved. I checked what I have now. Modify AR15 A2 barrel extension for M4 feed ramp? It's best to use rifle/rifle combo or M4/M4. If your upper isn't showing signs of bullets rubbing on the aluminum under the barrel extension, you should be good with M4 ramps. BCM 14.5" MK2 Upper (Standard) w/ 13" MLOK Handguard - FDE To conclude, the M4 feed ramps bring a lot of improvements to the AR-platform firearms. Edited April 27, 2014 by Mark Gale If you have an account, sign in now to post with your account. Please allow 5~10 days for assembly and testing before ship date. AR Tech Tip - Checking M4 Ramps for overhang - YouTube 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? All uppers are assembled cleaned and tested before shipping. 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. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. Remember less is more, little by little. AR-15 Feed Ramp Problems - School of the American Rifle 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. Instead, I just loaded up each mag with two rounds, and pushed the rounds forward by hand until the tip of . It gives a longer ramp that is less steep into the chamber. 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.) . A feed ramp is a basic feature of many breech loading cartridge firearm designs. 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! Gas block area is .750 diameter. This USGI modification was done to both the barrel extension and the upper receiver, creating a longer and steeper feed ramp. Backing up a ton: Any and all AR-15 barrel extensions have feed ramps. Polishing the edges of the chamber mouth to remove the edges of that chamfer will. Theres a bit more to it than just polishing. A forum community dedicated to drag racing drivers and enthusiasts. The ramp angles are different and changing the profile of the extension doesn't make it something it isn't. AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. Questions on how to install your new BA barrel? Don't ever put non M4 ramped barrel on a M4 ramped upper receiver. All this basically means is that the ramps continue from the barrel extension down through the upper receiver tonthe magazine. I've been thinking about doing sort of an "Early Diemaco C8 carbine" clone build with a C7 style upper receiver. The M4 ramps, if I am not mistaken, were originally made to help reduce malfunctions on the M4 carbine. Damaged Ak front end Barrel in Trunnion with or without sight bases. EDIT: Okay, I understand now! M4 feed ramps will extend the barrel extension and the upper receiver. I've seen several places say you just need a 1/8" chainsaw sharpening bit and a Dremel to fix it. 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. In case My barrel is rifle ramp it won't be so bad after all. [ARCHIVED THREAD] - M4 feed ramp barrel in a non M4 ramp upper. This can lead to a rare but odd situation; barrel and receiver mismatch. I can still use the combination. -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! Not saying a really good gunsmith cant do it, just that theres a bit of an involved process. Ready to drop onto a complete lower receiver. In this episode of Gun Stock Reviews, we look at the difference between M4 Ramps and the old standard ramps of the past. 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. Finding the proper upper receiver is your best option. 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. A couple of times I ended up with the OK set up from the picture above. 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. 2. An older-version (or A2-style) feed ramp is cut only on the barrel extension itself (top). Then you can get a regular rifle barrel for the upper with no ramps. Anodized red parts. For use by barrel manufacturers. Thanks! The Differences Between an M4 and an AR15 - Music Raiser I cant advise on that one folks. I recommend putting any AR-platform firearm together with a matched M4 barrel extension and upper receiver set, just because you can. 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. However, its rare now to find an upper receiver or a ready-to-go barrel that doesnt have the M4 cuts. Do you need an M4 feed ramp on your AR? Here is some info. 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 have a non ramped barrel in a ramped upper, feeds fine. Im an old vet, now retired and looking to build some ARs as a hobby to keep me doing something that I will enjoy. True, which is why they're not even needed in semi autos. "A Bad Day At The Range Is Better Than A Great Day Working". It may not display this or other websites correctly. 308 m5 using m4 feed ramps, which I belive are for the smaller round like. Should M4 feed ramps come with the barrel or upper? : r/ar15 - reddit Its highly recommended to put any AR-platform firearm together with a matching M4 barrel extension and upper receiver set. Id just get one for that barrel and find a barrel with m4 extension for the upper you already have. They were not intended to be super long range man killers. I don't have much to add re: feed ramps, but. /r/ar15 is here for your favorite black gun links, build pics, questions and other tactical or practical information. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. It's an interesting question. Full M4 feed ramps are on both the upper and barrel extension. The M-16/M4 are great weapons. Reddit and its partners use cookies and similar technologies to provide you with a better experience. Feed ramps on barrel extensions are a good example. 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. Those ramps line up with the barrel, which are cut deeper than on a rifle barrel. AR15 20 inch Upper Receiver Group (SS) w/ Handguard | BCM Change the angle so that the ramp ends at the exact same point. JavaScript is disabled. Thats true overall and good to keep in mind. http://www.ar15fornoobs.com/wp-content/uploads/feedramps.jpg. Whether they materialize or not depends on the direction of the mismatch. Some suggest taking a grinder to the extension area. FFL Fax: 866-721-8691. 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? In general, all you need to understand is that the M4 feed ramps include the barrel extension and upper receiver.