adding m4 feed ramps to barrel
I got my help from this thread, and thank you again to ORD. I read in Bravo company that there are 2 kinds of flat top upper. For someone who is new at trying to understand feed ramps it helps to read a couple different explanations. 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. Powered by Invision Community, M4-style barrel extension with Rifle-type upper. Ready to drop onto a complete lower receiver. I'd rather just pay the gunsmith to make it work than hunt down another barrel/upper if possible. I can still use the combination. 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. Thread: Adding M4 feedramps to A1/C7 upper. 's blog. 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. and add them to non-m4 barrels.? Does it make a big difference? Little polish. When I function tested it the first time with live half-jacketed rounds I had the worst FTF jam I have ever experienced. On AR9's, I understand the distance between the Mag Follower and the Feed Ramp is a known complication in the design. 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. Anodized red parts. They . I'm a machinist in the aerospace industry and lucky enough to have. Press question mark to learn the rest of the keyboard shortcuts. He had more to say and added some more engineer and gun designer speak too. Upload or insert images from URL. The M-16/M4 are great weapons. The closest brand new barrel you are likely to find is the Windham Weaponry 20 inch 1/7 twist chrome lined barrel. You cannot paste images directly. If I can correct an issue before it's an issue that is preferred. Can I use a barrel with M4 feed ramps with an upper that isnt M4 matched? Caught a deal on a matched barrel and bolt. M4 feed ramps will extend the barrel extension and the upper receiver. I don't have much to add re: feed ramps, but. Sorta. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. Personally, I would sell the rifle upper and buy an M4 upper - the cost will be small and you will end up with a more satisfactory end product. Either way is good and both types work great with semi auto only guns. 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. Costs about $40-50 to have the feed ramps reprofiled from what I can gather. Id just get one for that barrel and find a barrel with m4 extension for the upper you already have. Required fields are marked *. I bought a .458 upper to go with it, with the extra internal clearance cut before anodizing. So there's a lot more going on with rounds bouncing up and down in the mags etc. 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. 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. If this is your first visit, be sure to $101.95. The last is using the best and right ammo for the job. i have an extra brand new M4 barrel extension ramp to replace a rifle ramp. Polishing the edges of the chamber mouth to remove the edges of that chamfer will. is the m4 feedramp common in barrel extensions? I've seen that pic, it is a good reference. Seems M4 is all the rage these days. 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! this is the barrel designed and profiled for the Mark 12 Mod 0 uppers and rifles. 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? 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. Barrels are Douglas 416 stainless steel with 1-7 twist with M4 feed ramps I didn't forsee that we'd ever see the day when replacement parts would be so hard to get. Went back to the sellers website and found I was not the only one with problems. There is no way to make a carbine barrel extension out of a rifle barrel extension, period, full stop. By Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? Thats why AR10s- And Scar heavies exist for. Any body need a anchor for a very small boat? 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. Product Details Douglas 18" Flat Dark Earth Cerakoted 416 stainless steel barrel with 1-7 twist and M4 feed ramps. 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. I've modified barrel/receivers even before M4 cuts came out and done some receivers when the barrels had cuts. Im an old vet, now retired and looking to build some ARs as a hobby to keep me doing something that I will enjoy. Only took a few minutes. Share it in the comments section. Previous. In military situations, it is advantageous for rifles to function with damaged, worn, or less than ideally serviceable magazines. The M4 style feed ramps and barrel extension provide consistent feeding and the matte black Manganese Phosphate finish resists external corrosion and oxidation. I checked what I have now. Reliability is the main concern for me when I re-barrel this rifle. What's the difference? Rear side of a CZ-75B pistol barrel showing the (here dirty) feed ramp. The parts are interchangeable. check out the. It gives a longer ramp that is less steep into the chamber. Go back to writing school. I wont buy a barrel that isnt a wylde 223 556 but Im only now noticing. Paste as plain text instead, I am having a tough time finding an in-stock barrel (18 or 20 incher) with a rifle extension on it. Copyright 2016 - 2023 by AdventureFootstep.com. AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. 410 stainless is also harder and more corrosion resistant than conventional 416 stainless found in other commercially available precision barrels. Looking for a black stripped A1 upper with non m4 feed ramps (just realized the upper I have wont work with my barrel). This Kit is made to cut or polish the STEEL Feed Ramps on your Barrel Extension ONLY. Jams and misfires. Seems counter intuitive to recommend an M4 cut upper, especially if the barrel Im looking at has the rifle feed ramp (not M4 cut). The barrel Throat is the second most critical component after angles and should be polished with utmost care. The trust part is accepting claims of USGI-spec parts actually being done to not only blueprint dimensions, but also made from the correct materials treated to the same processes. They are also 1/7 twist, 4150 steel, chrome lined, and button rifled like the real deal! 16" Pre-Ban M4 Profile Barrel Assembly CARBINE Gas System About Upper assembly comes completely head spaced and test fired. The good idea is that the round, presented at a lower plane, will contact other lower feed ramps and go right on in. Shorter length equates to much higher pressure in the upper receiver. The only one I found is LaRue's upper, but it won't work with the hand guard I'm using (Geissele MKIII). practical_man Gas block area is .750 diameter. Married pretty well with my Seekins machined lower. I put together a second AR9 that is having a feeding issue, even if using similar parts as the first 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. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. That is what I tell people when they try to convince me that they need a stainless barrel instead of chrome-moly. However, its rare now to find an upper receiver or a ready-to-go barrel that doesnt have the M4 cuts. All uppers are assembled cleaned and tested before shipping. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. It's best to use rifle/rifle combo or M4/M4. LanceRiley, I'll probably build a pistol out of this one. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. Finding the proper upper receiver is your best option. For the purposes of this chapter, we'll call the new one the M4, and the old one the AR. To conclude, the M4 feed ramps bring a lot of improvements to the AR-platform firearms. which is bad combo. 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. 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. Dec 17, 2020. I built the upper using a Mega upper with a Compass Lake 18" barrel. 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. Remember less is more, little by little. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. 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. If your mag catch is at Spec height, you should not have a problem with an M4 cut barrel in a rifle receiver. Absolutely nothing to do with casing diameter, or whatever other weird sht you guys imagine. 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 . Description Genuine 14.5" SOCOM, carbine length gas system barrel from Colt. BUT if you find someone to grind your feed ramps and they do a good job, post it up and let us know. 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. Interesting reading. This is one time it's better to go a little too far than to leave an edge for the . /r/ar15 is here for your favorite black gun links, build pics, questions and other tactical or practical information. hey bro nice to see you here!!! All this basically means is that the ramps continue from the barrel extension down through the upper receiver tonthe magazine. Press J to jump to the feed. Here you can see an upper with "rifle" feedramps. I have a 723 build (w/ C7 upper) and a 727 build (A2 upper) that use 14.5" Colt M4 barrels. 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. As suggested, its best to match the upper and barrel extension no worries that way. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. Most of barrel assemblies and upper receivers on the market now have a present of M4 feed ramps. 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. Insert the barrel and sharpie the cut area, then use the right bit on a dremel. All Rights Reserved. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. The ramp angles are different and changing the profile of the extension doesn't make it something it isn't. Barrel, sight and trigger work on most pistols and shotguns. The mil actually only specs M4 feed ramps for use in its M4s. Gun smith said , not head spaced properly. Should not be too hard. 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. Home Firearms Figuring Out 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. *Must have a registered ARFCOM account to win. are all barrels w/ m4 feed ramps?? I would only add the feed ramps to the receiver if I had feeding issues, which you should not have. Do you have an AR barrel or feed ramp tip? Our 6mm ARC barrel come standard with 1-7.5 Twist, M4 Feed Ramps and gas tube. I too built a .458 SOCOM carbine . If you ever have an issue, then look at getting a correct barrel for the upper. Upper Receiver, A4, Flat Top, USGI, Numbered, AR-Stoner Upper Receiver Stripped AR-15 A3 Flat-Top Matte, Black River Tactical 16 Cold Hammer Forged Optimum Barrel Accuracy Evaluation. It's best to use rifle/rifle combo or M4/M4. 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. Create an account to follow your favorite communities and start taking part in conversations. so im thinking I might as well just get the unramp upper. Is it kosher to add M4 feed ramps to a standard upper to match an m4 ramped barrel? http://www.ar15fornoobs.com/wp-content/uploads/feedramps.jpg. If I have a rifle ramp upper and get the barrel later and coincidentally will have an m4 ramp. 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). Load a magazine with two or three rounds, lock the bolt group back on your rifle or carbine and insert the magazine. Those ramps line up with the barrel, which are cut deeper than on a rifle barrel. Try this little exercise: 1. This has been my concern with modifying the aluminum parts. With the increased use of larger-diameter cased cartridges, the M4 feed ramps are proving their values when using them in those cartridges. This can lead to a rare but odd situation; barrel and receiver mismatch. Its not a big deal but still an important thing to remember and understand. Thanks! The barrel extension and the receiver both have to have the cuts. 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? You need to match up barrels to receivers for optimum performance. If you have an account, sign in now to post with your account. Some barrels I see for sale say they include M4 feed ramps, and some uppers say they include them too. JavaScript is disabled. By Yamil Sued August 6, 2021. I prefer them. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. Edited April 27, 2014 by Mark Gale if you are OK with 3MOA, you might go 20,000 rounds! 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. I'm lookin for a clear definition as to what they are, and what they do to enhance a given rifle's performance? I'm planning on replacing my forearm with a Larue 13.5. You need to match up barrels to receivers for optimum performance. A forum community dedicated to drag racing drivers and enthusiasts. "A Bad Day At The Range Is Better Than A Great Day Working". Brevity matters. Will my A3 upper reciever work with my M4 barrel extention.According to some or your posts they will.Thanks Bill. Any use of this content without express written consent is prohibited. 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. While I've got everything apart, I'm thinking I just want to put an M4 barrel extension on. An older-version (or A2-style) feed ramp is cut only on the barrel extension itself (top). The M4 ramps, if I am not mistaken, were originally made to help reduce malfunctions on the M4 carbine. 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. The ramps are in the barrel extension. I like getting another Upper idea then you could end up with two rifles! Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? 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. A feed ramp is a basic feature of many breech loading cartridge firearm designs. 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. 2. True, which is why they're not even needed in semi autos. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Owning Best Ruger SR9c Accessories Can Change Your Life. The information provided here does not represent the views of Cheaper Than Dirt! I like all my guns to be reliable. Just because you can, doesn't mean you should. Supposedly you'll only notice issues with rapid/auto fire with a configuration like this. They offer a lower, more extensive, and smoother entry for any round of ammo, whether its necessary or not. Modern Series Barrels. All Rights Reserved. Amazing what happens in a thread over a simple question. 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. Only took a few minutes. Earlfillmore 13 hr. 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. 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. It is milled out of 6061 T6. Ar-15 Manufacturers Should Be Avoided: Which Should You Buy? This is a big tip, by the way, for pistol-caliber ARs. can the barrel extension be bought individualy? 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 For instance I was looking at the BCM upper receiver, and it said it had M4 feed ramps machined into the upper. Its also recommended you polish the ramps once youve achieved the appropriate angle. You have the option of barrel type, thread, fluting, finish type and to add a match bolt. The Mission of Cheaper Than Dirt! AR9 - Help diagnosing feeding issue. Damaged Ak front end Barrel in Trunnion with or without sight bases. All NFA rules apply. 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. 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. The difference between standard feed ramps and M4 ramps is easy to see. Having been in military supply, I know that what the mil-spec means: it gets the minimum job done for thousands (millions) of parts/systems. If it was some flat top + 16" FSB barrel id just swap upper/barrel, but this is a little more challenging to do that with. instead of mil-spec. 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. Thank you for answering the question do well. Semi autos run slower than full autos. The manufacturer said they had sold hundreds of barrels with out problems reported. 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. Its easier to add feed ramps to the receiver not so easy to add them to the barrel extension. 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. "C" stamp and CAGE code available. The Bullet ~ Handguns, Rifles and Shotguns, http://thearguys.com/ar-facts/m4-feed-ramps/. ago KrinkyDink2 9 hr. I've been thinking about doing sort of an "Early Diemaco C8 carbine" clone build with a C7 style upper receiver. You must log in or register to reply here. 4. I think your mistaking that with adding ramps to the receiver. What is an m4 feed ramp? You can put a M4 barrel and non-M4 receiver together, but you can't mismatch them the other way. I replaced the M4 feed ramp barrel with a monolithic feed ramp barrel and no more problems. I would just make sure to order rifle upper with rifle barrel extension or M4 upper with M4 barrel extension. #2. If a barrel comes with the feed ramps could I take them off? I had seen these pix years ago and dismissed the idea of mix and match. 30 cal. Snipers Hide is a community of Snipers of all kinds, focusing on long range shooting, accuracy, and ballistics. Contents: 1 Diamond Burr (For Colt 2 Stage Ramps) 1 Cut Lube (For Diamond Burr) 1 Bullet Stone (For Reshaping . The barrel is supposed to have the M4 feed ramps. It has 2 ramps cut into the receiver to help the rounds feed into the chamber. Machined from 4150 Chrome Moly Vanadium Steel and feature a QPQ corrosion resistant finish and QPQ coated M4 feed ramp extension. Feels like a silly question now that it makes sense. And that is the important thing! The best case is to have both an upper and barrel that have the feed ramps. The photo shows the dents and the bolt lugs line up perfectly. M16's fed pretty well before the M4 feed ramps were introduced. Also, barrel life is relative. Not all mil-spec features advertised on the product information are the real mil-specs. Display as a link instead, 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. 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. DSA has fat top, Mueller, non feed ramp uppers for $40. A closer look at uppers and barrel extensions. The rifle-platform M16s dont use them. Some gun owners believe that the M4 ramps can help for some of the larger-diameter cartridges in use.