Adding M4 feedramps to A1/C7 upper - M4Carbine.net 5. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. Feed Ramp Polishing - How To Do It Properly? - Homestead & Prepper Just put it in and shoot it. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. Shorter length equates to much higher pressure in the upper receiver. If you have a bolt that you would like to use you are welcome to ship it to us for accurate headspace. I've thought about it myself, and I'd like to see test results if any exist, displaying what reliability effect M4 ramps have on other barrel lengths. 11.5", SBN, 1:7, 5.56 NATO Barrel 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 . However Ive built numerous ar15 and lr308 rifles and pistols. Caught a deal on a matched barrel and bolt. To measure just where the round makes impact on the feed ramps, I did not use any sort of micrometer to measure. Read Now. Would not feed to save its life! I found the article very informative. Press J to jump to the feed. It's an interesting question. My experience with ARs is all A-1s. Full M4 feed ramps start on the upper and continue onto the barrel extension. I would just make sure to order rifle upper with rifle barrel extension or M4 upper with M4 barrel extension. Change the angle so that the ramp ends at the exact same point. This gave it a longer point for the magazine to allow the rounds to come out of the magazine and feed into the chamber. Anything else you want to share about M4 clones would be appreciated, especially when it comes to a reliable rifle. 6.5 Grendel Type 2 | 16" Black Nitride | 1:8 Twist Carbine Length Gas 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. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. I can still use the combination. You also repeated yourself. 's blog. This USGI modification was done to both the barrel extension and the upper receiver, creating a longer and steeper feed ramp. I will attest that a rifle upper and a barrel with the M4 feedramps works just fine. This Kit is made to cut or polish the STEEL Feed Ramps on your Barrel Extension ONLY. 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 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). I recommend putting any AR-platform firearm together with a matched M4 barrel extension and upper receiver set, just because you can. Some barrels I see for sale say they include M4 feed ramps, and some uppers say they include them too. I am having a tough time finding an in-stock barrel (18 or 20 incher) with a rifle extension on it. Copyright 1996-2023 AR15.COM LLC. Experts advise on 31 degrees+30 minus-zip. Site towers are not "F" marked SPECS: Length- 14.5". 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. Machined from 4150 Chrome Moly Vanadium Steel and feature a QPQ corrosion resistant finish and QPQ coated M4 feed ramp extension. Single Action and Double Action Which One Is Better For You? And that is the important thing! #2. Add M4 cuts to Barrel Ext $15.00 We can modify your rifle extension to match the M4 cuts in an upper receiver. Its a miracle! As a result, the factory machined M4 feed ramps on the receiver are hard coat anodized which adds significant strength to the aluminum. There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. this is the barrel designed and profiled for the Mark 12 Mod 0 uppers and rifles. The photo shows the dents and the bolt lugs line up perfectly. 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 . Thats true overall and good to keep in mind. In case My barrel is rifle ramp it won't be so bad after all. A feed ramp is a basic feature of many breech loading cartridge firearm designs. Only took a few minutes. 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. DSA has fat top, Mueller, non feed ramp uppers for $40. from my service in the 70s to my personal weapons, all of my ARs are early 1970 slab sided Colt SP1s. AR-15 Barrel Extension Question - Sniper's Hide Forum The information provided here does not represent the views of Cheaper Than Dirt! are all barrels w/ m4 feed ramps?? 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. Only took a few minutes. By the time you made it work you spent more time, money, and effort than if you just bought a new barrel or upper. So, an M4 feed ramp includes the barrel extension and the upper. 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. Ar15 Upper receivers A2 and Colt A1, M4 and - Northwest Firearms Your link has been automatically embedded. 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. Im an old vet, now retired and looking to build some ARs as a hobby to keep me doing something that I will enjoy. I'll probably build a pistol out of this one. Some suggest taking a grinder to the extension area. I just need a little guidance on this and I'm having trouble getting good results from Google. 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. Higher pressure equte to parts (bcg, buffer, buffer spring, ROUNDS, etc) experiencing much higher wear/tear. A4 Complete Upper Receiver - 7075 Forged A4 Flat Top Upper Receiver - M4 Feed Ramps Includes: - Add to Cart. It's near impossible to replace the carry handle upper I have these days, and finding a colt chrome lined 20" light weight barrel isn't a walk in the park either. 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. Full M4 feed ramps start on the upper and continue onto the barrel extension. It is milled out of 6061 T6. - The Shooter's Log, 2012 SHOT Show Special Report: Del-Ton TRX Rifle and More! Home Firearms Figuring Out Feed Ramps. AR15 Feed Ramp Cut & Polish Kit - School of the American Rifle One new winner* is announced every week! 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. Its highly recommended to put any AR-platform firearm together with a matching M4 barrel extension and upper receiver set. /r/ar15 is here for your favorite black gun links, build pics, questions and other tactical or practical information. There is no way to make a carbine barrel extension out of a rifle barrel extension, period, full stop. Here you can see an upper with "rifle" feedramps. In general, all you need to understand is that the M4 feed ramps include the barrel extension and upper receiver. AR15 20 inch Upper Receiver Group (SS) w/ Handguard | BCM I notice that's a Gibbz (or Gibbz-type) upper. I've seen several places say you just need a 1/8" chainsaw sharpening bit and a Dremel to fix it. The M4 ramps, if I am not mistaken, were originally made to help reduce malfunctions on the M4 carbine. 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. Reddit and its partners use cookies and similar technologies to provide you with a better experience. The Bullet ~ Handguns, Rifles and Shotguns, http://thearguys.com/ar-facts/m4-feed-ramps/. Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. can you buy feed ramps individually? He had more to say and added some more engineer and gun designer speak too. Press J to jump to the feed. True, which is why they're not even needed in semi autos. I have a non ramped barrel in a ramped upper, feeds fine. Your previous content has been restored. pm me at BOG or PG, or get in touch with my number 09177542777 if you're interested. Other selections are available for upper, bolt and carrier, charging handle, handguards, flash hiders, and gas blocks. 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. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. 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. Colt LE6920SOCOM M4 Carbine 5.56 16.1 Barrel SOCOM Sight 30-rd Create Account; Log Out ; Log In ; Wishlist 0; Shopping Cart 0; Home; About M4 feed ramps. Reliability is the main concern for me when I re-barrel this rifle. I suggest you get a rifle receiver. Your discussions, feedback and comments are welcome here as long as they are relevant and insightful. This space is for pictures of "retro" Stoner rifles and completed or partial retro AR-15 builds, as well as discussions about either. Should not be too hard. It has ran flawlessly (barring tuning of the gasblock when new) with several different brands of magazines and ammo. It's best to use rifle/rifle combo or M4/M4. Making a non M4 feed ramp barrel work in an M4 feed ramp upper. Feed ramps being m4 or. Your email address will not be published. I can assure you that most mods that deviate from the original design aren't 100% reliable. Please be respectful of others. The M4, and the CAR-15, before it have had similar problems like the ones you mentioned. They aid in feeding the round into the chamber from the magazine more easily, which make uppers and barrel extension matched. Standard vs M4 Feed Ramps, what's the difference #1056 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. FWIW one of my rifles has M4 feed ramps on the barrel and no M4 feed ramps on the upper and it has functioned just fine. 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. To conclude, the M4 feed ramps bring a lot of improvements to the AR-platform firearms. JavaScript is disabled. Del-Ton, Inc. AR-15 16" M4 Custom Upper The extension is the part at the end of the barrel that fits inside the upper. Snipers Hide is a community of Snipers of all kinds, focusing on long range shooting, accuracy, and ballistics. My alternative plan is to do exactly as you describe. M4 Barrel Extension (M4 Feedramps) - Bravo Company USA I prefer them. Seems like it should work to me, but be a real challenge to keep clean and be damned ugly to boot. Interesting reading. 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? 2. Thread: Adding M4 feedramps to A1/C7 upper. Gas block area is .750 diameter. BUT if you find someone to grind your feed ramps and they do a good job, post it up and let us know. 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. 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. Copyright 1996-2023 AR15.COM LLC. Damaged Ak front end Barrel in Trunnion with or without sight bases. Questions on how to install your new BA barrel? upper recievers and barrels are hard to comeby. I have a 723 build (w/ C7 upper) and a 727 build (A2 upper) that use 14.5" Colt M4 barrels. This 20" BCM barrel is machined from SS410 stainless steel. Ready to drop onto a complete lower receiver. Feed ramps on barrel extensions are a good example. Upper Receiver WITHOUT M4 Feed Ramp Cuts? - Sniper's Hide Forum Factory said its fine . 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. All NFA rules apply. instead of mil-spec. 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. Seems M4 is all the rage these days. ago Costs about $40-50 to have the feed ramps reprofiled from what I can gather. Copyright 2016 - 2023 by AdventureFootstep.com. Which Model Colt 1911 is For Me? May 17, 2008 in The Armorer. For the purposes of this chapter, we'll call the new one the M4, and the old one the AR. Feed Ramps -300BlkTalk If I can correct an issue before it's an issue that is preferred. 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. The barrel extension and the receiver both have to have the cuts. I'm assuming that you only need the ramps from one or the other. Thats receivers, bolts, and on down the list of the 100 or so parts that can make up an AR-15. . 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. I don't have much to add re: feed ramps, but. AR-15 feed ramp issues - Rifle - Technical - Brian Enos's Forums I didn't forsee that we'd ever see the day when replacement parts would be so hard to get.