Quote Originally Posted by evert View Post
IF iI remember correctly, my own bastard Mercury has a piston milled for a sight rail. That might help a bit?
Yes, evert.

The late Airsporter/Mercuries had a cutout in the top of the piston skirt to clear the Maxgrip scope rail lugs.
I'd prefer to keep the full skirt to retain the option of fitting a bearing if I feel the gun needs one.



All the best Mick