The Firing Line Forums - View Single Post - AR-15 w/ an abnormal F to F problem

BMSMA · November 14, 2009, 05:52 PM

I picked up an Bushmaster AR-15 today. It seems to have a failure-to-feed problem with twist that is strange to me. The bullets of the rounds seem to be getting scratch marks from the lugs after the feed ramp.

It appears the rounds are binding up on the lugs. I am unfamiliar with what could cause this.

I have tied various mags, ammo, and swiching uppers and lower, but with no avail.

Any ideas would be helpful.

November 14, 2009, 05:52 PM	#1
BMSMA Member Join Date: March 18, 2009 Location: Here Posts: 51	AR-15 w/ an abnormal F to F problem I picked up an Bushmaster AR-15 today. It seems to have a failure-to-feed problem with twist that is strange to me. The bullets of the rounds seem to be getting scratch marks from the lugs after the feed ramp. It appears the rounds are binding up on the lugs. I am unfamiliar with what could cause this. I have tied various mags, ammo, and swiching uppers and lower, but with no avail. Any ideas would be helpful.