Ah, thanks. I didn't get my DD BCG from smartgunner, I already had one from Grant and it came with the O-ring installed. I removed it straight away but now I'm going to test it installed.
Just ordered the BCM SOPMOD bolt upgrade kit and a 3-pack extractor spring upgrade kit, they're good to have on hand. It's one of those things I kept forgetting to add to previous orders.
The biggest issue with assembling an AR isn't so much getting the parts together right - it's getting the right parts together.
US Army 1966-69, VFW Life Member, Retired Geek
Last edited by Quentin; 09-01-2011 at 05:33 PM.