L1A1 Frame-Body Lock

[Peter Laidler]

Had to remove the return spring tube and drill it out in a specially made jig. I think it was a 5mm thread too! If the drill wandered off course, the TMH was scrapped. In the commercial world I would imagine that as it was the long shaft part of the screw that was important, if the drill veered off course you could just thread oversize.

That was really a Far East area problem really.