A couple of times I ended up with the OK set up from the picture above. Description. Konza Defender M-LOK 5.56 16" Rifle 1x7 FEATURES: 16" 4150 Nitride 1x7 5.56 Barrel T-Marked Upper with M4 Feed Ramps Steel Micro Gas Block, and Carbine Length Gas Tube 15" 7075 T6 Aluminum Free Float M-LOK Hand Guard A2 Muzzle Break BCG is an M16 Style Nitride QPQ Finish Charging Handle Mil-Spec 6 Position Mil-Spec Diameter Stock Buy AR 15 16" .350 Legend Nitride M4 Profile Barrel 1:16: GunBroker is the largest seller of AR15 Parts Gun Parts All: 974000728 . 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. The barrel Throat is the second most critical component after angles and should be polished with utmost care. All Rights Reserved. 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. and add them to non-m4 barrels.? Full M4 feed ramps start on the upper and continue onto the barrel extension. I guess it depends on what your relationship to the necessary shop activities is. All we do is dremmel it to match - we dont remove it and grind to any specific angle. Its highly recommended to put any AR-platform firearm together with a matching M4 barrel extension and upper receiver set. If you don't clean it but demand 3/4MOA you might get 1,500. Polishing the edges of the chamber mouth to remove the edges of that chamfer will. M4 extension with .350 M4 style feed ramps 11 Degree Target Crown Threaded Muzzle 5/8"x24 TPI Weight: 26.5 ounces Change the angle so that the ramp ends at the exact same point. Thats an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. this is the barrel designed and profiled for the Mark 12 Mod 0 uppers and rifles. 3. In general, all you need to understand is that the M4 feed ramps include the barrel extension and upper receiver. 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. Ideally both. The M4 receiver feed ramps are cut at a steeper angle and, as a result, extend down into the receiver wall. 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. Brevity matters. 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. One new winner* is announced every week! They . 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. Feeds flawlessly. 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. On AR9's, I understand the distance between the Mag Follower and the Feed Ramp is a known complication in the design. Clear editor. 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. 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. 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 I wont buy a barrel that isnt a wylde 223 556 but Im only now noticing. For someone who is new at trying to understand feed ramps it helps to read a couple different explanations. Everything that you have on your side to make any weapons more reliable and work when it absolutely needs to is a plus. 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? I didn't forsee that we'd ever see the day when replacement parts would be so hard to get. Thats receivers, bolts, and on down the list of the 100 or so parts that can make up an AR-15. Most of barrel assemblies and upper receivers on the market now have a present of M4 feed ramps. Your previous content has been restored. I have seen it done many, MANY times and if done right, it works/functions 100% without issue. 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. Required fields are marked *. As suggested, its best to match the upper and barrel extension no worries that way. This Kit is made to cut or polish the STEEL Feed Ramps on your Barrel Extension ONLY. The only other time it seems to help is if the mag is feeding the rounds with the bullet slightly angled lower than normal. Looking to spend $180-250 (depending on condition, forge mark and if a rear sight is included or not.) In most cases the ramps only help during full auto mode while cycling at a high rate. Looking for a black stripped A1 upper with non m4 feed ramps (just realized the upper I have wont work with my barrel). This is a big tip, by the way, for pistol-caliber ARs. 2. The upper is designed to have two levels of top rails for mounting of night vision in front of scopes. The difference between standard feed ramps and M4 ramps is easy to see. Good call. For the purposes of this chapter, we'll call the new one the M4, and the old one the AR. These units actually feature the NON-F-Marked (correct) front sight base. In this episode of Gun Stock Reviews, we look at the difference between M4 Ramps and the old standard ramps of the past. I'm a machinist in the aerospace industry and lucky enough to have unrestricted access to a really nice machine shop so the modification from rifle to M4 feed ramps is no sweat, I've done it once before a few years back with a .250" carbide cutter in the mill for a friend and it came out looking indistinguishable from a true M4 extension. The extension is the part at the end of the barrel that fits inside the upper. Product Details Douglas 18" Flat Dark Earth Cerakoted 416 stainless steel barrel with 1-7 twist and M4 feed ramps. By Some gun owners believe that the M4 ramps can help for some of the larger-diameter cartridges in use. It's best to have M4 ramps on both the upper and barrel. 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. Gas block area is .750 diameter. Thanks. Contents: 1 Diamond Burr (For Colt 2 Stage Ramps) 1 Cut Lube (For Diamond Burr) 1 Bullet Stone (For Reshaping . 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. 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. Thread: Adding M4 feedramps to A1/C7 upper. Other selections are available for upper, bolt and carrier, charging handle, handguards, flash hiders, and gas blocks. 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 ramps are in the barrel extension. The last is using the best and right ammo for the job. Feels like a silly question now that it makes sense. can you buy feed ramps individually? When I function tested it the first time with live half-jacketed rounds I had the worst FTF jam I have ever experienced. It's best to use rifle/rifle combo or M4/M4. What is the difference between Modern, Performance, and Premium Series Barrels? AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. Paste as plain text instead, For a better experience, please enable JavaScript in your browser before proceeding. I should have taken my own advice for once. What is an m4 feed ramp? But, as with anything else, this work can go too far. 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? which is bad combo. By the time you made it work you spent more time, money, and effort than if you just bought a new barrel or upper. M4 feed ramps are not an original design, they were designed for the M4 In fact, the . I bought a .458 upper to go with it, with the extra internal clearance cut before anodizing. I will attest that a rifle upper and a barrel with the M4 feedramps works just fine. *Must have a registered ARFCOM account to win. The tip of the cartridge rarely comes into contact with the upper receiver. They aid in feeding the round into the chamber from the magazine more easily, which make uppers and barrel extension matched. 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 Absolutely nothing to do with casing diameter, or whatever other weird sht you guys imagine. That is what I tell people when they try to convince me that they need a stainless barrel instead of chrome-moly. Here you can see an upper with "rifle" feedramps. A couple of times I ended up with the OK set up from the picture above. "A Bad Day At The Range Is Better Than A Great Day Working". AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. We have four combinations here: For a better experience, please enable JavaScript in your browser before proceeding. 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. By my estimates, the tip of the bullet first hits the barrel extension about 1/3 of the way up the respective feed ramp on the barrel extension. Semi autos run slower than full autos. so im thinking I might as well just get the unramp upper. He had more to say and added some more engineer and gun designer speak too. This 20" BCM barrel is machined from SS410 stainless steel. 2. 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. Most work performed while-you-wait, evening and saturday appointments available. So, an M4 feed ramp includes the barrel extension and the upper. Reddit and its partners use cookies and similar technologies to provide you with a better experience. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. I read in Bravo company that there are 2 kinds of flat top upper. The barrels also had to be modified. JavaScript is disabled. I've seen that pic, it is a good reference. Site towers are not "F" marked SPECS: Length- 14.5". 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. This gave it a longer point for the magazine to allow the rounds to come out of the magazine and feed into the chamber. again, Thanks. Dec 17, 2020. Press J to jump to the feed. Copyright 2016 - 2023 by AdventureFootstep.com. which is basicallly an m16a1 cut down. "It will last 5k rounds instead of 4k. Feed ramps being m4 or. -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! I've seen several places say you just need a 1/8" chainsaw sharpening bit and a Dremel to fix it. Copyright 1996-2023 AR15.COM LLC. 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. Machined from 4150 Chrome Moly Vanadium Steel and feature a QPQ corrosion resistant finish and QPQ coated M4 feed ramp extension. 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. #2. I've been thinking about doing sort of an "Early Diemaco C8 carbine" clone build with a C7 style upper receiver. 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. Modern Series Barrels. This space is for pictures of "retro" Stoner rifles and completed or partial retro AR-15 builds, as well as discussions about either. 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.) . Add M4 cuts to Barrel Ext $15.00 We can modify your rifle extension to match the M4 cuts in an upper receiver. The barrel is supposed to have the M4 feed ramps. Founded by Frank Galli in 2000, Snipers Hide has been offering informational videos, podcasts, and other support to its users in one location. 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. You want them to match. 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. Use this M4 Barrel extention with M4 feedramps. I have a 723 build (w/ C7 upper) and a 727 build (A2 upper) that use 14.5" Colt M4 barrels. 308 m5 using m4 feed ramps, which I belive are for the smaller round like. A closer look at uppers and barrel extensions. Display as a link instead, 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. Not all mil-spec features advertised on the product information are the real mil-specs. Since the M4 barrel is one and a half inches shorter than the minimum legal barrel you can install in an AR15, the M4 gas tube will be, of course, smaller. 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. I got my help from this thread, and thank you again to ORD. I've shot a good deal of rounds through 20" A2's and I realize they run but you are describing issues that the M4 feed ramps alleviate, that would probably be good to reduce on A2's as well. If you have a bolt that you would like to use you are welcome to ship it to us for accurate headspace. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. Then you can get a regular rifle barrel for the upper with no ramps. There's a 7 degree difference between standard and M4 ramps. A forum community dedicated to drag racing drivers and enthusiasts. An older-version (or A2-style) feed ramp is cut only on the barrel extension itself (top). Thank you for answering the question do well. 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! Description Genuine 14.5" SOCOM, carbine length gas system barrel from Colt. To measure just where the round makes impact on the feed ramps, I did not use any sort of micrometer to measure. It has ran flawlessly (barring tuning of the gasblock when new) with several different brands of magazines and ammo. In short, if you have a Dremmel you can do it yourself. Just put it in and shoot it. CARBON-15 Stripped Lower Receiver 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? By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. 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. Any use of this content without express written consent is prohibited. Is it worth the extra 50 bucks?" And that the M4s and M4A1s are issued M855 which has a slight difference in bullet shape vs. the older 55gr M193 BALL. The Shooter's Log, is to provide informationnot opinionsto our customers and the shooting community. Press J to jump to the feed. 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. Its a miracle! This USGI modification was done to both the barrel extension and the upper receiver, creating a longer and steeper feed ramp. A4 Complete Upper Receiver - 7075 Forged A4 Flat Top Upper Receiver - M4 Feed Ramps Includes: - Add to Cart. Some suggest taking a grinder to the extension area. Go back to writing school. Damaged Ak front end Barrel in Trunnion with or without sight bases. Please be respectful of others. Gun smith said , not head spaced properly. colt A1E1 733 uppers didn't have extended carbine feedramps ? From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. The barrel blanks available are made from 416 Stainless Steel. Insert the barrel and sharpie the cut area, then use the right bit on a dremel. Bullets tend to bump, snag, and stub on these guns. M4 barrel to non M4 receiver is fine, but not the other way around. Press question mark to learn the rest of the keyboard shortcuts. Our 6.5 Grendel Black Nitride rifle barrels are made from the finest 4150 Chrome Moly Vanadium and precisely rifled for high accuracy at a great price. 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 . So, lets glide down these lines below to erase your misconceptions about them. FFL Fax: 866-721-8691. I like all my guns to be reliable. These Mil-Spec M4 feed ramps are part of the original CNC manufacturing process. You wrote that much to make a point that should have taken about 100 words? 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. Ar-15 Manufacturers Should Be Avoided: Which Should You Buy? I use it for hunting dogs only. I put together a second AR9 that is having a feeding issue, even if using similar parts as the first one. The only one I found is LaRue's upper, but it won't work with the hand guard I'm using (Geissele MKIII). Would not feed to save its life! I'm lookin for a clear definition as to what they are, and what they do to enhance a given rifle's performance? The M4 style feed ramps and barrel extension provide consistent feeding and the matte black Manganese Phosphate finish resists external corrosion and oxidation. This can lead to a rare but odd situation; barrel and receiver mismatch. As a result, the factory machined M4 feed ramps on the receiver are hard coat anodized which adds significant strength to the aluminum. By The best case is to have both an upper and barrel that have the feed ramps. 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 found the article very informative. Costs about $40-50 to have the feed ramps reprofiled from what I can gather. 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. If your upper isn't showing signs of bullets rubbing on the aluminum under the barrel extension, you should be good with M4 ramps. 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. 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 Only took a few minutes. The angle is going to be key, alot of people attempt to mimic the angle of the barrel feed ramps, this is incorrect. I'd rather just pay the gunsmith to make it work than hunt down another barrel/upper if possible. Backing up a ton: Any and all AR-15 barrel extensions have feed ramps. The good idea is that the round, presented at a lower plane, will contact other lower feed ramps and go right on in. Just because you can, doesn't mean you should. Jams and misfires. 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. 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). 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. I think your mistaking that with adding ramps to the receiver. If you have an account, sign in now to post with your account. 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. Create Account; Log Out ; Log In ; Wishlist 0; Shopping Cart 0; Home; About I suggest you get a rifle receiver. There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. Snipers Hide is a community of Snipers of all kinds, focusing on long range shooting, accuracy, and ballistics. While I've got everything apart, I'm thinking I just want to put an M4 barrel extension on. Sorta. The ramps on the regular rifle-type extension are cut just to the edge of the extension. Installing a Luth-AR Rifle Buffer Tube and an A2 Stock #1041. However, its rare now to find an upper receiver or a ready-to-go barrel that doesnt have the M4 cuts. Full M4 feed ramps start on the upper and continue onto the barrel extension. BrianEnos.com upper recievers and barrels are hard to comeby. "C" stamp and CAGE code available. Then the manufacturer discontinued the barrel. Thanks! Caught a deal on a matched barrel and bolt. I wouldn't be concerned at all with any wear after modifying an upper receiver. Shorter length equates to much higher pressure in the upper receiver. M16s and M16-A1s run at 750 rounds per minute in full auto. is the m4 feedramp common in barrel extensions? Seems counter intuitive to recommend an M4 cut upper, especially if the barrel Im looking at has the rifle feed ramp (not M4 cut). Our 6mm ARC barrel come standard with 1-7.5 Twist, M4 Feed Ramps and gas tube. In case My barrel is rifle ramp it won't be so bad after all. Does anyone have a follow up that confirms or denies my claim? This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. from my service in the 70s to my personal weapons, all of my ARs are early 1970 slab sided Colt SP1s. 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. I'm a machinist in the aerospace industry and lucky enough to have. Anything else you want to share about M4 clones would be appreciated, especially when it comes to a reliable rifle. April 23, 2014 in Rifle - Technical. M4 can better explain their benefit, although they help with more reliable feeding. 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. I recommend putting any AR-platform firearm together with a matched M4 barrel extension and upper receiver set, just because you can. Check often for fit. Some barrels I see for sale say they include M4 feed ramps, and some uppers say they include them too. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. 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. Thanks for explaining the feed ramp topic in a couple of different ways. Will my A3 upper reciever work with my M4 barrel extention.According to some or your posts they will.Thanks Bill. Product Description Surplus Colt 14.5" SOCOM, carbine length gas system barrel from Colt. M4 ramps help in feeding in for carbine in full auto. Feedramps, proper staking of castle nuts, forward assist (yep went there)S-happens seen it. All things being equal and having used both weapons extensively, Id rather have the feed Ramps. 410 stainless is also harder and more corrosion resistant than conventional 416 stainless found in other commercially available precision barrels. 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! 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.