adding m4 feed ramps to barrel

So the engineers lowered the feed rampa into the receiver. 6.5 Grendel Type 2 | 16" Black Nitride | 1:8 Twist Carbine Length Gas . I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. This 20" BCM barrel is machined from SS410 stainless steel. BUT if you find someone to grind your feed ramps and they do a good job, post it up and let us know. 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. 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 barrel blanks available are made from 416 Stainless Steel. The tip of the cartridge rarely comes into contact with the upper receiver. Most work performed while-you-wait, evening and saturday appointments available. If a barrel comes with the feed ramps could I take them off? I have looked and looked and looked. colt A1E1 733 uppers didn't have extended carbine feedramps ? can you buy feed ramps individually? If it's happening regularly, check the magazines you are using for serviceability. [WTB] Black A1 carry handle upper NON-m4 feed ramp $200 Gas block area is .750 diameter. Change the angle so that the ramp ends at the exact same point. 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. Recommend using a gunsmith this route too if you are not comfortable. Feed Ramp Polishing - How To Do It Properly? - Homestead & Prepper ago Costs about $40-50 to have the feed ramps reprofiled from what I can gather. 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). Modify AR15 A2 barrel extension for M4 feed ramp? 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. Feed ramps being m4 or. Its also recommended you polish the ramps once youve achieved the appropriate angle. Copyright 1996-2023 AR15.COM LLC. 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. There is no way to make a carbine barrel extension out of a rifle barrel extension, period, full stop. 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. 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. However Ive built numerous ar15 and lr308 rifles and pistols. Should M4 feed ramps come with the barrel or upper? : r/ar15 - reddit Only took a few minutes. Create Account; Log Out ; Log In ; Wishlist 0; Shopping Cart 0; Home; About Watch a video about our Modern Series AR barrel: 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 may not display this or other websites correctly. M4 ramps help in feeding in for carbine in full auto. Thats why AR10s- And Scar heavies exist for. You want them to match. You can put a M4 barrel and non-M4 receiver together, but you can't mismatch them the other way. Some gun owners believe that the M4 ramps can help for some of the larger-diameter cartridges in use. I picked up a side charging upper from Sundevil last year. These Mil-Spec M4 feed ramps are part of the original CNC manufacturing process. In military situations, it is advantageous for rifles to function with damaged, worn, or less than ideally serviceable magazines. If you ever have an issue, then look at getting a correct barrel for the upper. 338 and others not the .308 76251 or 6.5 creedmore which o think should have a.30cal feed ramp.? These units actually feature the NON-F-Marked (correct) front sight base. So, an M4 feed ramp includes the barrel extension and the upper. Colt LE6920SOCOM M4 Carbine 5.56 16.1 Barrel SOCOM Sight 30-rd Using an upper with M4 feed ramps with a barrel that does not have them will lead to feed problems as it creates a ledge/lip that can catch the bullet tip as it tries to feed. For the purposes of this chapter, we'll call the new one the M4, and the old one the AR. Making a non M4 feed ramp barrel work in an M4 feed ramp upper. The extension is the part at the end of the barrel that fits inside the upper. I can assure you that most mods that deviate from the original design aren't 100% reliable. 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). Add M4 cuts to Barrel Ext $15.00 We can modify your rifle extension to match the M4 cuts in an upper receiver. AR15 20 inch Upper Receiver Group (SS) w/ Handguard | BCM M4 feed ramps. So I'm working on my first build, and I'm a little confused. Create an account to follow your favorite communities and start taking part in conversations. 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. Looking For Bear Creek Arsenal Barrels Review? To measure just where the round makes impact on the feed ramps, I did not use any sort of micrometer to measure. It has 2 ramps cut into the receiver to help the rounds feed into the chamber. If I have a rifle ramp upper and get the barrel later and coincidentally will have an m4 ramp. 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. What is the difference between Modern, Performance, and Premium Series Barrels? On AR9's, I understand the distance between the Mag Follower and the Feed Ramp is a known complication in the design. 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. It is milled out of 6061 T6. Press question mark to learn the rest of the keyboard shortcuts. The only other time it seems to help is if the mag is feeding the rounds with the bullet slightly angled lower than normal. Just put it in and shoot it. JavaScript is disabled. 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. 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. If you aren't 110% comfortable with doing the job, and you do not have all the tools and equipment to do it properly, then have a smith do it for you. How to Polish a Feedramp Quick and Easy | Firearms Talk I would just make sure to order rifle upper with rifle barrel extension or M4 upper with M4 barrel extension. CARBON-15 Stripped Lower Receiver 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. And it appears that the bolt is slamming into the top of the bullet. M4 Barrel Extension (M4 Feedramps) - Bravo Company USA Your previous content has been restored. Do you need an M4 feed ramp on your AR? Here is some info. They are better! 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. Product Description Surplus Colt 14.5" SOCOM, carbine length gas system barrel from Colt. You also repeated yourself. Barrels are Douglas 416 stainless steel with 1-7 twist with M4 feed ramps 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. Modern Series Barrels. 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 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. It's an interesting question. 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? It's best to use rifle/rifle combo or M4/M4. To conclude, the M4 feed ramps bring a lot of improvements to the AR-platform firearms. So like ORD says it is entirely 100% possible and plenty of people do it, but I would rather not do any work to this perfect barrel. BUT, I DO NOT TRUST MY LIFE TO THAT WEAPON. After two months of back and forth, cleaned up the feed ramps. I've been thinking about doing sort of an "Early Diemaco C8 carbine" clone build with a C7 style upper receiver. There is a picture of the various options, hopefully another poster can link them. 5. If you have an account, sign in now to post with your account. 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. An older-version (or A2-style) feed ramp is cut only on the barrel extension itself (top). Earlfillmore 13 hr. AR-15 feed ramp issues - Rifle - Technical - Brian Enos's Forums Thanks. Here you can see an upper with "rifle" feedramps. 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. Good call.