Quote Originally Posted by philcbr View Post
Hi all

as requested more pictures added.
While polishing the piston I did not do the end of the rod that inserts in to the trigger block, it does not have any noticable wear marrks on the end.

http://i513.photobucket.com/albums/t...pswuqbdecn.jpg

http://i513.photobucket.com/albums/t...psu09r4vzm.jpg

I will assemble the gun tomorrow minus the spring and try suggestions from the group.

Regards

Phil.
In one of your photos, you are showing the trigger cocked and the sear engagement part of the piston rod well behind the main sear, so that part of the geometry is correct. Therefore, when the spring is in it is either becoming coil bound, or the end of the piston rod is not long enough to bear on the back end of the main sear in order to cock the trigger, or the cocking lever/slot is mis-matched, such that the piston is not being pushed back far enough.