FFL Fax: 866-721-8691. I checked what I have now. Barrel is medium SPR profiled barrel, threaded with a 1/2-28 thread for the AE brakes and collar. Thread: Adding M4 feedramps to A1/C7 upper. I have a 723 build (w/ C7 upper) and a 727 build (A2 upper) that use 14.5" Colt M4 barrels. which is basicallly an m16a1 cut down. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. Remember less is more, little by little. Earlfillmore 13 hr. The M4 ramps, if I am not mistaken, were originally made to help reduce malfunctions on the M4 carbine. 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 . The manufacturer said they had sold hundreds of barrels with out problems reported. If you ever have an issue, then look at getting a correct barrel for the upper. The M4 style feed ramps and barrel extension provide consistent feeding and the matte black Manganese Phosphate finish resists external corrosion and oxidation. The ramps on the regular rifle-type extension are cut just to the edge of the extension. So there's a lot more going on with rounds bouncing up and down in the mags etc. Load a magazine with two or three rounds, lock the bolt group back on your rifle or carbine and insert the magazine. 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. and add them to non-m4 barrels.? I can probably get the upper reciever first. Ar-15 Manufacturers Should Be Avoided: Which Should You Buy? This is a big tip, by the way, for pistol-caliber ARs. Founded by Frank Galli in 2000, Snipers Hide has been offering informational videos, podcasts, and other support to its users in one location. This is one time it's better to go a little too far than to leave an edge for the . Product Details Douglas 18" Flat Dark Earth Cerakoted 416 stainless steel barrel with 1-7 twist and M4 feed ramps. Amazing what happens in a thread over a simple question. Some barrels I see for sale say they include M4 feed ramps, and some uppers say they include them too. No need to alter the upper. 's blog. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. 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. This 20" BCM barrel is machined from SS410 stainless steel. Watch a video about our Modern Series AR barrel: I've seen several places say you just need a 1/8" chainsaw sharpening bit and a Dremel to fix it. 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. The upper I want to rebarrel is modified for Service Rifle competition so it's not quite as cheap as buying another $89 upper from Aero. Which Model Colt 1911 is For Me? Any use of this content without express written consent is prohibited. Only took a few minutes. Either way is good and both types work great with semi auto only guns. It was in the last few issues of SAR. Feed ramps on barrel extensions are a good example. 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 like all my guns to be reliable. Full M4 feed ramps are on both the upper and barrel extension. 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? Hasn't misfed yet, through initial break in up through 1k rounds, and that's mag length ammo. Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? I suggest you get a rifle receiver. aaargh.. that's the setup I hate to see. 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? AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. Notify me of follow-up comments by email. Looking For Bear Creek Arsenal Barrels Review? The only one I found is LaRue's upper, but it won't work with the hand guard I'm using (Geissele MKIII). Rifles, Uppers, Lowers, Barrels, and more, [ARCHIVED THREAD] - Rifle vs m4 feed ramps, http://i135.photobucket.com/albums/q125/PursuitSS/Postings%20photos/c0d26170b75c3e6f9ea65a7d0862247e.jpg. These units actually feature the NON-F-Marked (correct) front sight base. So, lets glide down these lines below to erase your misconceptions about them. Feedramps, proper staking of castle nuts, forward assist (yep went there)S-happens seen it. 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! Upload or insert images from URL. Questions on how to install your new BA barrel? JavaScript is disabled. What's the difference? Shorter length equates to much higher pressure in the upper receiver. 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. For new construction barrels only. I like getting another Upper idea then you could end up with two rifles! To conclude, the M4 feed ramps bring a lot of improvements to the AR-platform firearms. You have the option of barrel type, thread, fluting, finish type and to add a match bolt. Feed ramps being m4 or. 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. How long your barrel "lasts" depends on what your accuracy threshold is before you decide it is too bad to keep using. This gave it a longer point for the magazine to allow the rounds to come out of the magazine and feed into the chamber. For a better experience, please enable JavaScript in your browser before proceeding. A4 Complete Upper Receiver - 7075 Forged A4 Flat Top Upper Receiver - M4 Feed Ramps Includes: - Add to Cart. M4 Feed ramps on barrel extensions are a solid example. I'm assuming that you only need the ramps from one or the other. The barrels also had to be modified. Check often for fit. 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.) . M4 feed ramps will extend the barrel extension and the upper receiver. 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. 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. Anything else you want to share about M4 clones would be appreciated, especially when it comes to a reliable rifle. There is a picture of the various options, hopefully another poster can link them. It's best to use rifle/rifle combo or M4/M4. So I called. The Bullet ~ Handguns, Rifles and Shotguns, http://thearguys.com/ar-facts/m4-feed-ramps/. Previous. 2. He had more to say and added some more engineer and gun designer speak too. I've modified barrel/receivers even before M4 cuts came out and done some receivers when the barrels had cuts. You absolutely do not want it the other way around however. The Shooter's Log, is to provide informationnot opinionsto our customers and the shooting community. Don't forget read more information about it here! If you have a bolt that you would like to use you are welcome to ship it to us for accurate headspace. 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. A forum community dedicated to drag racing drivers and enthusiasts. Looking for a black stripped A1 upper with non m4 feed ramps (just realized the upper I have wont work with my barrel). Reddit and its partners use cookies and similar technologies to provide you with a better experience. I got my help from this thread, and thank you again to ORD. You cannot paste images directly. A feed ramp is a basic feature of many breech loading cartridge firearm designs. Mil-spec is good for the masses, and if you want the job done it is a great start. Dec 17, 2020. I didnt think anything about it having M4 feed ramps. from my service in the 70s to my personal weapons, all of my ARs are early 1970 slab sided Colt SP1s. M4 can better explain their benefit, although they help with more reliable feeding. 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. Here you can see an upper with "rifle" feedramps. 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. Some gun owners believe that the M4 ramps can help for some of the larger-diameter cartridges in use. 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 You can put a M4 barrel and non-M4 receiver together, but you can't mismatch them the other way. 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. Required fields are marked *. #2. If I have a rifle ramp upper and get the barrel later and coincidentally will have an m4 ramp. While I've got everything apart, I'm thinking I just want to put an M4 barrel extension on. Press J to jump to the feed. By Yamil Sued August 6, 2021. Thats why AR10s- And Scar heavies exist for. The last is using the best and right ammo for the job. My alternative plan is to do exactly as you describe. All Rights Reserved. For the purposes of this chapter, we'll call the new one the M4, and the old one the AR. Thank you for answering the question do well. I think your mistaking that with adding ramps to the receiver. LanceRiley, Our 6mm ARC barrel come standard with 1-7.5 Twist, M4 Feed Ramps and gas tube. Installing a Luth-AR Rifle Buffer Tube and an A2 Stock #1041. Any use of this content without express written consent is prohibited. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. M16's fed pretty well before the M4 feed ramps were introduced. Please be respectful of others. 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. Caught a deal on a matched barrel and bolt. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. M4 Feed ramps on barrel extensions are a solid example. 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. It's best to use rifle/rifle combo or M4/M4. Add 3% to the total cost for credit card purchases. M4 16", SBN, 1:7, 5.56 NATO Barrel Specifications: - Caliber: 5.56 NATO (.223 REM) - Gas Tube: Car Add to Cart. 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. can the barrel extension be bought individualy? pictures would help. is the m4 feedramp common in barrel extensions? I cant advise on that one folks. upper recievers and barrels are hard to comeby. All uppers are assembled cleaned and tested before shipping. You also repeated yourself. Copyright 1996-2023 AR15.COM LLC. Guess what? The ramp angles are different and changing the profile of the extension doesn't make it something it isn't. Costs about $40-50 to have the feed ramps reprofiled from what I can gather. The barrel blanks available are made from 416 Stainless Steel. This Kit is made to cut or polish the STEEL Feed Ramps on your Barrel Extension ONLY. You can always buy a non-m4 extension and have the new barrel retimed and headspaced, but it will probably cost more than a new upper receiver. Im an old vet, now retired and looking to build some ARs as a hobby to keep me doing something that I will enjoy. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. I bought a .458 upper to go with it, with the extra internal clearance cut before anodizing. Home Firearms Figuring Out Feed Ramps. I found the article very informative. Whether they materialize or not depends on the direction of the mismatch. Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? By the time you made it work you spent more time, money, and effort than if you just bought a new barrel or upper. 16" Pre-Ban M4 Profile Barrel Assembly CARBINE Gas System About Upper assembly comes completely head spaced and test fired. You wrote that much to make a point that should have taken about 100 words? M4 barrel to non M4 receiver is fine, but not the other way around. We reserve the right to edit as appropriate, delete profane, harassing, abusive and spam comments or posts, and block repeat offenders.