Sight shown is for the Parker Hale 1200TX. If you want to fit this to a commerical Mauser you have to drill and tap 2 8-32 holes. Holes on a commerical mauser will be 6-48. This sight was also used on the C3 ....same action as 1200TX...execpt it had a quick removal base that mounted on the rear scope bracket. Front sight was mounted higher to compensate for the bracket height. Just a note...C3A1 was a scoped rifle only....just being phased out of the Canadianicon military.