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9/19/2017 7:27:10 PM
Posted: 3/24/2006 4:42:41 PM EDT
I have a Bushmaster 16" A1 upper with AK brake I've had since 2003, it is now mounted on a Century arms lower I built last December. I was at the range today and the rifle was firing fine with Wolf 55gr HP, WWB 45gr HP Varmit, and some M855PD as it always has. Then it started to not hold the bolt open after the last round. Shortly after that it started to FTE. On all rounds, with all ammo and mags. I thought I had broken an extracter, but it seems fine. I tried snap caps when I got home and they are ejecting strongly when I pull the charging handle. Any ideas?

Thanks in advance.
Link Posted: 3/24/2006 5:18:56 PM EDT
short stroking sounds like.

check the carrier gas key.

make sure it's tight.

check and make sure the gas tube roll pin is still present in the FSB.
Link Posted: 3/24/2006 5:28:21 PM EDT
Link Posted: 3/24/2006 6:03:38 PM EDT
Checked the gas tube pin and the carrier key is still tight. I also just cleaned the rifle real well (as I always do) but just to be sure did it again. I also noticed that the buffer spring is really tight, so I replaced it with another that feels slightly softer. I noticed quite a bit of wear on the buffer face, my Colt HBAR is the only other I have with this wear on the face. Could the buffer be a problem?

Thanks guys, I'll try it on Sunday.
Link Posted: 3/24/2006 6:52:14 PM EDT
Link Posted: 3/24/2006 8:50:16 PM EDT
I'll check the carrier for a bur. I always remove any burs or other sharp edges from the buffer spring. I've never lubed my buffer or spring as I thought it wasn't needed. Should I do that?
Link Posted: 3/24/2006 9:02:15 PM EDT
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