thanks for the reply rob!. I did not cross thread (looked and study it for awhile, extremely clean lines). BCM gun fighter comes with the exact same screw as the original A2 screw with no loctite so I decided to just use the original the first time. If it passes a function test and the grip is in tight, anything I should look for as a operational issue?
*I will now be cleaning out areas like that before installing something*