AR-15 feed ramp issues - Rifle - Technical - Brian Enos's Forums The ramp angles are different and changing the profile of the extension doesn't make it something it isn't. They . Edited April 27, 2014 by Mark Gale Any use of this content without express written consent is prohibited. How long your barrel "lasts" depends on what your accuracy threshold is before you decide it is too bad to keep using. You also repeated yourself. 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 will last 5k rounds instead of 4k. ago Costs about $40-50 to have the feed ramps reprofiled from what I can gather. Colt LE6920SOCOM M4 Carbine 5.56 16.1 Barrel SOCOM Sight 30-rd There's a 7 degree difference between standard and M4 ramps. Feed ramps being m4 or. You have the option of barrel type, thread, fluting, finish type and to add a match bolt. Will my A3 upper reciever work with my M4 barrel extention.According to some or your posts they will.Thanks Bill. The rifle-platform M16s dont use them. 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. These units actually feature the NON-F-Marked (correct) front sight base. Either way is good and both types work great with semi auto only guns. *Must have a registered ARFCOM account to win. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. A4 Complete Upper Receiver. Thats receivers, bolts, and on down the list of the 100 or so parts that can make up an AR-15. First of Im not a gunsmith or firearms professional. Editors Note: This article was originally published in January of 2019. The extension is the part at the end of the barrel that fits inside the upper. 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.
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