Bastogne71 covered the key points on these screws - 3/8 by 1 1/8" slotted head - same for both.

A few comments. The screws are fairly rare and too often the wrong screwdriver messes them up, affecting the looks and value of an otherwise mint to near mint piece. That is why I have kept a few original screws in new condition. I have recommended that the brake be removed and replaced with the False muzzle to protect the bbl tip and to save the Brake as it is no help to accuracy and cruds up quickly and is generally damaged (finish) in cleaning. The screw is best replaced with a hex head screw to save the original and damage to the brake or false muzzle.

I used to sell a kit of 3 hex screws and hex wrench to provide the suggested protection. The demand has since dropped off, so I have not offered them in some years, as with other 41/46 parts.

__________________
TOMBECK