I recently built an AR9 (Glock Mags) that has been running flawlessly for about 3-400rds. The M4, and the CAR-15, before it have had similar problems like the ones you mentioned. When I function tested it the first time with live half-jacketed rounds I had the worst FTF jam I have ever experienced. Thats receivers, bolts, and on down the list of the 100 or so parts that can make up an AR-15. 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. How long your barrel "lasts" depends on what your accuracy threshold is before you decide it is too bad to keep using. 16" Pre-Ban M4 Profile Barrel Assembly CARBINE Gas System About Upper assembly comes completely head spaced and test fired. which is basicallly an m16a1 cut down. They are better! Your link has been automatically embedded. Those ramps line up with the barrel, which are cut deeper than on a rifle barrel. Rifle vs m4 feed ramps - AR15.COM I have seen it done many, MANY times and if done right, it works/functions 100% without issue. You must log in or register to reply here. AR-15 Barrel Extension Question - Sniper's Hide Forum As they are becoming more and more a standard, and certainly do not do any harm to us. Share it in the comments section. Only took a few minutes. And that the M4s and M4A1s are issued M855 which has a slight difference in bullet shape vs. the older 55gr M193 BALL. I have a non ramped barrel in a ramped upper, feeds fine. Looking for a black stripped A1 upper with non m4 feed ramps (just realized the upper I have wont work with my barrel). Should not be too hard. Theres a bit more to it than just polishing. 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. Metal cases ammunition such as Wolf through an M4 clone? So, an M4 feed ramp includes the barrel extension and the upper. The parts are interchangeable. They . 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. from my service in the 70s to my personal weapons, all of my ARs are early 1970 slab sided Colt SP1s. The first reason is that they are, indeed, better. 410 stainless is also harder and more corrosion resistant than conventional 416 stainless found in other commercially available precision barrels. CUTTING M4 RAMPS - YouTube The M4 style feed ramps and barrel extension provide consistent feeding and the matte black Manganese Phosphate finish resists external corrosion and oxidation. As a result, the factory machined M4 feed ramps on the receiver are hard coat anodized which adds significant strength to the aluminum. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. I think your mistaking that with adding ramps to the receiver. Some, me included, have said that the M4 ramps are a help to some of the larger-diameter cartridges in use, such as 6.5 Grendel or .22 Nosler. 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. Your email address will not be published. Description. 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 The Bullet ~ Handguns, Rifles and Shotguns, http://thearguys.com/ar-facts/m4-feed-ramps/. Display as a link instead, Both. This space is for pictures of "retro" Stoner rifles and completed or partial retro AR-15 builds, as well as discussions about either. Modern Series Barrels. A closer look at uppers and barrel extensions. M4 can better explain their benefit, although they help with more reliable feeding. Dec 17, 2020. Any body need a anchor for a very small boat? which is bad combo. By Yamil Sued August 6, 2021. I've been thinking about doing sort of an "Early Diemaco C8 carbine" clone build with a C7 style upper receiver. M4 ramps help in feeding in for carbine in full auto. Everything that you have on your side to make any weapons more reliable and work when it absolutely needs to is a plus. . 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. Also, barrel life is relative. Given that most of us dont always have perfect access to truly genuine Mil-Spec, mil-standard parts (those actually used in issued fighting tools), were shopping based on a little part trust and a bigger part knowledge. AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. What is the difference between Modern, Performance, and Premium Series Barrels? 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! 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. 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 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. Feels like a silly question now that it makes sense. If your mag catch is at Spec height, you should not have a problem with an M4 cut barrel in a rifle receiver. Clear editor. One new winner* is announced every week! Damaged Ak front end Barrel in Trunnion with or without sight bases. You wrote that much to make a point that should have taken about 100 words? The A2's are pretty reliable guns, but trashed mags can cause them to have malfunctions also. The ramps are in the barrel extension. 338 and others not the .308 76251 or 6.5 creedmore which o think should have a.30cal feed ramp.? 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. The information provided here does not represent the views of Cheaper Than Dirt! Jams and misfires. Its also recommended you polish the ramps once youve achieved the appropriate angle. Backing up a ton: Any and all AR-15 barrel extensions have feed ramps. Figuring Out Feed Ramps | Feed Ramp Tips | The Shooter's Log In short, if you have a Dremmel you can do it yourself. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. 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. 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. I would just make sure to order rifle upper with rifle barrel extension or M4 upper with M4 barrel extension. The Fora platform includes forum software by XenForo. 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. Barrel, sight and trigger work on most pistols and shotguns. 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. While I've got everything apart, I'm thinking I just want to put an M4 barrel extension on. 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). Anodized red parts. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. 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. can you buy feed ramps individually? Is getting it as part of the upper better? 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. The rifle-platform M16s dont use them. With the increased use of larger-diameter cased cartridges, the M4 feed ramps are proving their values when using them in those cartridges. RTS Bartlein: 6mm ARC 26" - Compass Lake Engineering, LLC All comments are held for moderation and will appear after approval. -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! BCM 16" M4 Carbine Upper Receiver Group | BravoCompanyUSA Experts advise on 31 degrees+30 minus-zip. BCM 14.5" MK2 Upper (Standard) w/ 13" MLOK Handguard - FDE I didn't forsee that we'd ever see the day when replacement parts would be so hard to get. You can post now and register later. By the time you made it work you spent more time, money, and effort than if you just bought a new barrel or upper. For someone who is new at trying to understand feed ramps it helps to read a couple different explanations. Please be respectful of others. Should M4 feed ramps come with the barrel or upper? : r/ar15 - reddit They aid in feeding the round into the chamber from the magazine more easily, which make uppers and barrel extension matched. The only one I found is LaRue's upper, but it won't work with the hand guard I'm using (Geissele MKIII). what I fear the most is having an m4 ramp upper and then getting a barrel with a rifle ramp. I got my help from this thread, and thank you again to ORD. But, as with anything else, this work can go too far. Previous. 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. Either way is good and both types work great with semi auto only guns. For use by barrel manufacturers. Married pretty well with my Seekins machined lower. 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. #2. 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. I built the upper using a Mega upper with a Compass Lake 18" barrel. For the purposes of this chapter, we'll call the new one the M4, and the old one the AR. Cutting M4 feed ramps - Calguns.net check out the. http://www.ar15fornoobs.com/wp-content/uploads/feedramps.jpg. Product Details Douglas 18" Flat Dark Earth Cerakoted 416 stainless steel barrel with 1-7 twist and M4 feed ramps. You need to match up barrels to receivers for optimum performance. Go back to writing school. I can probably get the upper reciever first. Description Genuine 14.5" SOCOM, carbine length gas system barrel from Colt. Please allow 5~10 days for assembly and testing before ship date. Will my A3 upper reciever work with my M4 barrel extention.According to some or your posts they will.Thanks Bill. Not saying a really good gunsmith cant do it, just that theres a bit of an involved process. . They were not intended to be super long range man killers. 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). If you don't clean it but demand 3/4MOA you might get 1,500. Which Model Colt 1911 is For Me? what does it do?? I have a 723 build (w/ C7 upper) and a 727 build (A2 upper) that use 14.5" Colt M4 barrels. There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. Avoid Polishing Too Lightly Or Too Roughly M4 Feedramps - AR-15 Pro pm me at BOG or PG, or get in touch with my number 09177542777 if you're interested. The Mission of Cheaper Than Dirt! The photo shows the dents and the bolt lugs line up perfectly. Founded by Frank Galli in 2000, Snipers Hide has been offering informational videos, podcasts, and other support to its users in one location. Del-Ton, Inc. AR-15 16" M4 Custom Upper Gas block area is .750 diameter. Your discussions, feedback and comments are welcome here as long as they are relevant and insightful. This USGI modification was done to both the barrel extension and the upper receiver, creating a longer and steeper feed ramp. AR15 20 inch Upper Receiver Group (SS) w/ Handguard | BCM I read in Bravo company that there are 2 kinds of flat top upper. CARBON-15 Stripped Lower Receiver Feed Ramps -300BlkTalk FFL Fax: 866-721-8691. Add 3% to the total cost for credit card purchases. So the engineers lowered the feed rampa into the receiver. I'm a machinist in the aerospace industry and lucky enough to have. You can put a M4 barrel and non-M4 receiver together, but you can't mismatch them the other way. Ar-15 Manufacturers Should Be Avoided: Which Should You Buy? Other selections are available for upper, bolt and carrier, charging handle, handguards, flash hiders, and gas blocks. I've seen several places say you just need a 1/8" chainsaw sharpening bit and a Dremel to fix it. If a barrel comes with the feed ramps could I take them off? Home Firearms Figuring Out Feed Ramps. A couple of times I ended up with the OK set up from the picture above. 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. For instance I was looking at the BCM upper receiver, and it said it had M4 feed ramps machined into the upper. We have four combinations here: BEFORE YOU GO MODIFYING IT, check your headspace.I have a Gibbz upper in my junk drawer because the upper -- for some reason -- wouldn't allow a perfectly good bolt (as checked by Criterion) to headspace correctly on a Criterion barrel, with the bolt installed in the carrier. May 17, 2008 in The Armorer. Some barrels I see for sale say they include M4 feed ramps, and some uppers say they include them too. Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? Feed Ramp Polishing - How To Do It Properly? - Homestead & Prepper AR9 - Help diagnosing feeding issue. Amazing what happens in a thread over a simple question. 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.
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