Originally Posted by
Garvin
Part no. 16.134.1. It's called the end cap screw - helps secure the end cap.
This screw passes through the end cap & is secured in the under side of the cylinder. The screw itself is shouldered with the thread on the end so obviously any thread lock will take affect in the area obscured from your vision by the "sledge".
I would suggest you remove the rear sight & place the gun in a spring compressor or sash cramp to prevent any movement internally (I have known these screws to sheer off inside the gun) remove the screw & degrease in the usual way then apply a thread lock that can be broken using ordinary hand tools as this screw needs to be removed for servicing & re springing.
IF IT'S NOT BROKE.........DON'T FIX IT!