BCM Gunfighter Grip Screws
I installed a couple of them, and they have all been "difficult" to get tight. To the point where I worried that I may be cross-threading them, but I am not upon inspection. Last night, I installed one on my Daniel Defense SBR. It was VERY difficult, in fact, I mangled the screw head (using a large-blade that filled the slot, too!) and took it out. I was very worried, but the lower was fine. I then used the Daniel Defense sourced screw that came with the gun, and everything installed just fine. Snugged it down at the "bottom", and used the star washer, and she was good. No goop on the BCM threads.
Do they use a larger screw, and have others experienced this? Is this normal, was I doing it wrong, etc...?