And that the M4s and M4A1s are issued M855 which has a slight difference in bullet shape vs. the older 55gr M193 BALL. Proper maintenance and lubrication. A4 Complete Upper Receiver - 7075 Forged A4 Flat Top Upper Receiver - M4 Feed Ramps Includes: - Add to Cart. The information provided here does not represent the views of Cheaper Than Dirt! I've seen that pic, it is a good reference. In most cases the ramps only help during full auto mode while cycling at a high rate. There's a 7 degree difference between standard and M4 ramps. In case My barrel is rifle ramp it won't be so bad after all. Sent back again. M4 16", SBN, 1:7, 5.56 NATO Barrel Specifications: - Caliber: 5.56 NATO (.223 REM) - Gas Tube: Car Add to Cart. A closer look at uppers and barrel extensions. 4. Paste as plain text instead, well.. it's kinda hard to get stuff in this part of the world. Snipers Hide is a community of Snipers of all kinds, focusing on long range shooting, accuracy, and ballistics. Load a magazine with two or three rounds, lock the bolt group back on your rifle or carbine and insert the magazine. If I have a rifle ramp upper and get the barrel later and coincidentally will have an m4 ramp. upper recievers and barrels are hard to comeby. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. FFL Fax: 866-721-8691. The ramps are in the barrel extension. Seems M4 is all the rage these days. Finding the proper upper receiver is your best option. For new construction barrels only. You need to match up barrels to receivers for optimum performance. 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. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. Its a miracle! 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. An older-version (or A2-style) feed ramp is cut only on the barrel extension itself (top). I'd get jams from bullets hitting the back of the upper so I took a small round file and made the M4 ramps in the upper. Everything that you have on your side to make any weapons more reliable and work when it absolutely needs to is a plus. 's blog. In this episode of Gun Stock Reviews, we look at the difference between M4 Ramps and the old standard ramps of the past. 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! Seems like it should work to me, but be a real challenge to keep clean and be damned ugly to boot. Share it in the comments section. You have a rifle barrel. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. 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. 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 using the M4 feed ramps for your firearm, you could pick up an increased percentage of the rounds, and feeding reliability would be improved. Change the angle so that the ramp ends at the exact same point. So, an M4 feed ramp includes the barrel extension and the upper. So, what is the difference between M4 feed ramps and regular ones? Press question mark to learn the rest of the keyboard shortcuts. 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. So the engineers lowered the feed rampa into the receiver. They guide the bullet up and into the chamber. For instance I was looking at the BCM upper receiver, and it said it had M4 feed ramps machined into the upper. For the purposes of this chapter, we'll call the new one the M4, and the old one the AR. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. You want them to match. from my service in the 70s to my personal weapons, all of my ARs are early 1970 slab sided Colt SP1s. Most work performed while-you-wait, evening and saturday appointments available. Reliability is the main concern for me when I re-barrel this rifle. 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. Ok, So, in short, I've got a barrel on my Armalite upper (with M4 feed ramps in the upper) that has standard AR-15 (non-M4) ramps. Issues can arise when receivers and barrel extensions are mismatched. The parts are interchangeable. 50 bucks one way or the other on the barrel ain't squat! It has 2 ramps cut into the receiver to help the rounds feed into the chamber. I'm lookin for a clear definition as to what they are, and what they do to enhance a given rifle's performance? The difference between standard feed ramps and M4 ramps is easy to see. The M-16/M4 are great weapons. The barrels also had to be modified. I didn't forsee that we'd ever see the day when replacement parts would be so hard to get. So, lets glide down these lines below to erase your misconceptions about them. There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. The mil actually only specs M4 feed ramps for use in its M4s. Gun smith said , not head spaced properly. Its not a big deal but still an important thing to remember and understand. After two months of back and forth, cleaned up the feed ramps. Feeds flawlessly. Your discussions, feedback and comments are welcome here as long as they are relevant and insightful. The reason I decided to write about this topic at all was because there are some mil-spec features advertised on aftermarket parts that arent even really mil-spec. In military situations, it is advantageous for rifles to function with damaged, worn, or less than ideally serviceable magazines. Go back to writing school. 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. and add them to non-m4 barrels.? Display as a link instead, Please allow 5~10 days for assembly and testing before ship date. Guess what? Ideally both. While I've got everything apart, I'm thinking I just want to put an M4 barrel extension on. 16" Pre-Ban M4 Profile Barrel Assembly CARBINE Gas System About Upper assembly comes completely head spaced and test fired. Contents: 1 Diamond Burr (For Colt 2 Stage Ramps) 1 Cut Lube (For Diamond Burr) 1 Bullet Stone (For Reshaping . Here you can see an upper with "rifle" feedramps. Went back to the sellers website and found I was not the only one with problems. So I called. Get The Best Trigger Pull Gauges To Make Every Shot Count. *Must have a registered ARFCOM account to win. Would not feed to save its life! M4 feed ramps are not an original design, they were designed for the M4 In fact, the . 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? Does anyone have a follow up that confirms or denies my claim? Go slow and you'll be done in no time. $101.95. Other selections are available for upper, bolt and carrier, charging handle, handguards, flash hiders, and gas blocks. practical_man 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. I replaced the M4 feed ramp barrel with a monolithic feed ramp barrel and no more problems. Factory said its fine . For a better experience, please enable JavaScript in your browser before proceeding. Thread: Adding M4 feedramps to A1/C7 upper. If you ever have an issue, then look at getting a correct barrel for the upper. The photo shows the dents and the bolt lugs line up perfectly. 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. M16s and M16-A1s run at 750 rounds per minute in full auto. 5. However, I have seen more than a few basement gunsmith hackjobs using a dremel, some Jack Daniels/liquid courage, and an unsteady hand that have made a total, unrepairable mess of the job. I found the article very informative. Barrel customizations are also available. M4 barrel to non M4 receiver is fine, but not the other way around. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. this is the barrel designed and profiled for the Mark 12 Mod 0 uppers and rifles. 1 is a standard and the other for use with m4 feed ramp barrels. It is removeable with a special wrench and a barrel clamp/vise. I recently built an AR9 (Glock Mags) that has been running flawlessly for about 3-400rds. AR Tech Tip - Checking M4 Ramps for overhang School of the American Rifle 84.8K subscribers Subscribe 2.9K 90K views 2 years ago AR Tech Tip - Checking M4 Ramps for overhang Show more Show more. The rifle-platform M16s dont use them. I don't have much to add re: feed ramps, but. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. When I function tested it the first time with live half-jacketed rounds I had the worst FTF jam I have ever experienced. Not saying a really good gunsmith cant do it, just that theres a bit of an involved process. 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? instead of mil-spec. There are several, but Steve and the guys at ADCO in OH are one such option (they use the Dremel method, but they do it right as I have seen several first-hand examples of their work and its performance after the fact). 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. Amazing what happens in a thread over a simple question. 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. Upload or insert images from URL. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. They . 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. If your mag catch is at Spec height, you should not have a problem with an M4 cut barrel in a rifle receiver. By The first reason is that they are, indeed, better. 308 m5 using m4 feed ramps, which I belive are for the smaller round like. The last is using the best and right ammo for the job. There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. 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 can you buy feed ramps individually? I guess it depends on what your relationship to the necessary shop activities is. Just put it in and shoot it. are all barrels w/ m4 feed ramps?? Either way is good and both types work great with semi auto only guns. We have four combinations here: Thats why AR10s- And Scar heavies exist for. M4 feed 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. M4 extension with .350 M4 style feed ramps 11 Degree Target Crown Threaded Muzzle 5/8"x24 TPI Weight: 26.5 ounces Backing up a ton: Any and all AR-15 barrel extensions have feed ramps. This USGI modification was done to both the barrel extension and the upper receiver, creating a longer and steeper feed ramp. Questions on how to install your new BA barrel? Some suggest taking a grinder to the extension area. You absolutely do not want it the other way around however. Experts advise on 31 degrees+30 minus-zip. The closest brand new barrel you are likely to find is the Windham Weaponry 20 inch 1/7 twist chrome lined barrel. They were not intended to be super long range man killers. 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. 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.) . Please be respectful of others. Most of barrel assemblies and upper receivers on the market now have a present of M4 feed ramps. Thats true overall and good to keep in mind. If you have an account, sign in now to post with your account. By the time you made it work you spent more time, money, and effort than if you just bought a new barrel or upper. 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. It may not display this or other websites correctly. 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. Reddit and its partners use cookies and similar technologies to provide you with a better experience. Costs about $40-50 to have the feed ramps reprofiled from what I can gather. 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? Product Description Surplus Colt 14.5" SOCOM, carbine length gas system barrel from Colt. What's the difference? I like getting another Upper idea then you could end up with two rifles! Feedramps, proper staking of castle nuts, forward assist (yep went there)S-happens seen it. Some barrels I see for sale say they include M4 feed ramps, and some uppers say they include them too. They provide a lower, wider, and smoother entry for any round of ammo, whether its necessary or not. SKU: BCM-URG-M4-16 Features: M4 Feed Ramp Barrel Extension Caliber: 5.56 NATO Barrel Length: 16in Barrel Style: Standard Handguard: None BCM M4 Handguards (Double Heat Shield) - Black + $15.00 PKMR (Polymer KeyMod Rail) Carbine Length - Black + $24.95 PKMR (Polymer KeyMod Rail) Carbine Length - Flat Dark Earth + $24.95 Stock Status: Out of stock Looking for a black stripped A1 upper with non m4 feed ramps (just realized the upper I have wont work with my barrel). Machined from 4150 Chrome Moly Vanadium Steel and feature a QPQ corrosion resistant finish and QPQ coated M4 feed ramp extension. Not all mil-spec features advertised on the product information are the real mil-specs. There is a picture of the various options, hopefully another poster can link them. With the increased use of larger-diameter cased cartridges, the M4 feed ramps are proving their values when using them in those cartridges. Thats receivers, bolts, and on down the list of the 100 or so parts that can make up an AR-15. M4 Feed ramps on barrel extensions are a solid example. This is one time it's better to go a little too far than to leave an edge for the . On AR9's, I understand the distance between the Mag Follower and the Feed Ramp is a known complication in the design. Polishing the edges of the chamber mouth to remove the edges of that chamfer will. 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. Copyright 1996-2023 AR15.COM LLC. 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 . Only took a few minutes. The tip of the cartridge rarely comes into contact with the upper receiver. The good idea is that the round, presented at a lower plane, will contact other lower feed ramps and go right on in. Edited April 27, 2014 by Mark Gale I'm a machinist in the aerospace industry and lucky enough to have. The barrel Throat is the second most critical component after angles and should be polished with utmost care. I didnt think anything about it having M4 feed ramps. I have a non ramped barrel in a ramped upper, feeds fine. Just because you can, doesn't mean you should. Is one better than the other? The only other time it seems to help is if the mag is feeding the rounds with the bullet slightly angled lower than normal. 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). 2. I put together a second AR9 that is having a feeding issue, even if using similar parts as the first one. 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. i have the rifle barrel. This space is for pictures of "retro" Stoner rifles and completed or partial retro AR-15 builds, as well as discussions about either. For someone who is new at trying to understand feed ramps it helps to read a couple different explanations. Is getting it as part of the upper better? I have a 723 build (w/ C7 upper) and a 727 build (A2 upper) that use 14.5" Colt M4 barrels. By 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. check out the. hey bro nice to see you here!!! DSA has fat top, Mueller, non feed ramp uppers for $40. I wouldn't be concerned at all with any wear after modifying an upper receiver. 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. Add 3% to the total cost for credit card purchases. I read in Bravo company that there are 2 kinds of flat top upper. Is it kosher to add M4 feed ramps to a standard upper to match an m4 ramped barrel? 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. 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). Then you can get a regular rifle barrel for the upper with no ramps. Those ramps line up with the barrel, which are cut deeper than on a rifle barrel. We want you, our readers, to be able to make informed decisions. The magazine lips cannot move, so with these larger diameter cartridges, the bullet tips down lower about the centerline of the bore (half of the diameter increase to be exact). Feed ramps being m4 or. A feed ramp is a basic feature of many breech loading cartridge firearm designs. I'm planning on replacing my forearm with a Larue 13.5. Modern Series Barrels. 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. The angle is going to be key, alot of people attempt to mimic the angle of the barrel feed ramps, this is incorrect. Also, barrel life is relative. I think your mistaking that with adding ramps to the receiver. The barrel blanks available are made from 416 Stainless Steel. You wrote that much to make a point that should have taken about 100 words? I can still use the combination. 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. 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. AAC and anybody else that has any reasonable expectation of quality and reliability use an M4 feed ramp. Metal cases ammunition such as Wolf through an M4 clone? Avoid Polishing Too Lightly Or Too Roughly From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. All Rights Reserved. This has been my concern with modifying the aluminum parts. . For this test, I used a Colt upper with M4 feed ramps and a SOCOM heavy 14.5 barrel, just like what is used in the military. Description Genuine 14.5" SOCOM, carbine length gas system barrel from Colt. You are using an out of date browser. If you consider this article useful, share it with anyone in need! It has ran flawlessly (barring tuning of the gasblock when new) with several different brands of magazines and ammo. Full M4 feed ramps are on both the upper and barrel extension. All comments are held for moderation and will appear after approval. 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! One new winner* is announced every week! . #2. I notice that's a Gibbz (or Gibbz-type) upper. Absolutely nothing to do with casing diameter, or whatever other weird sht you guys imagine. 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 AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. again, Thanks. 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 . However, they do have M4 feed-ramps which is not clone correct. Single Action and Double Action Which One Is Better For You? Its highly recommended to put any AR-platform firearm together with a matching M4 barrel extension and upper receiver set. If your upper isn't showing signs of bullets rubbing on the aluminum under the barrel extension, you should be good with M4 ramps. It is milled out of 6061 T6. I've seen uppers with and without anodizing on M4 ramps . it seems to me to be about 50/50 with and without. It's best to have M4 ramps on both the upper and barrel. If I can correct an issue before it's an issue that is preferred. A4 Complete Upper Receiver. Thats an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. No feed ramps. 338 and others not the .308 76251 or 6.5 creedmore which o think should have a.30cal feed ramp.? I got my help from this thread, and thank you again to ORD. First of Im not a gunsmith or firearms professional. You must log in or register to reply here. I've modified barrel/receivers even before M4 cuts came out and done some receivers when the barrels had cuts. Barrel is medium SPR profiled barrel, threaded with a 1/2-28 thread for the AE brakes and collar. Barrel, sight and trigger work on most pistols and shotguns. Press J to jump to the feed. A couple of times I ended up with the OK set up from the picture above. What is the difference between Modern, Performance, and Premium Series Barrels? There is no way to make a carbine barrel extension out of a rifle barrel extension, period, full stop. Dec 17, 2020. Home Firearms Figuring Out Feed Ramps. You can post now and register later. Does it make a big difference? In short, if you have a Dremmel you can do it yourself. 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. so im thinking I might as well just get the unramp upper. 3. In general, all you need to understand is that the M4 feed ramps include the barrel extension and upper receiver. Buy AR 15 16" .350 Legend Nitride M4 Profile Barrel 1:16: GunBroker is the largest seller of AR15 Parts Gun Parts All: 974000728 . 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. Don't ever put non M4 ramped barrel on a M4 ramped upper receiver. Site towers are not "F" marked SPECS: Length- 14.5".