This is a full-circle Sig P6 story. I acquired both a Sig P225 and its specialty variant the P6 in pristine form many years ago. The P6 was imported by Century Arms International ("C.A.I") in Georgia, Vermont of all places. C.A.I. was a subsidiary of Century International Arms ("C.I.A"), however, importing German arms with a C.I.A. inscription was asking for too much attention, so the company word-smithed the inscription to C.A.I.....that is what mine has emblazoned on the side.
The P6 was a specialty German "Polezei" request for improving and distinguishing the popular single stack P225:
1. Increase the double-action pull weight to 12 lbs, from 10 lbs.
2. Modify the barrel feed ramp to improve hollow-point ammo feeding, as it was becoming popular in early'90's.
3. A unique "notched" hammer profile, i.e. "deformation hammer" that German armorers would inspect to perceive if the pistol had been dropped and landed on its hammer. IF so, the armorer would replace the hammer, hammer strut and firing pin as their integrity could all have been negatively affected by such a direct impact on the hammer.
4. "P6" roll mark on the slide
The period German holsters for the P225 / P6 were common thumb strap affairs which could easily launch their pistol with just the wrong momentum vector. Thus, the tell-tale deformation hammer as described in the P6 Manual.
I just acquired a new-old-stock Sig factory sight pusher specifically for the P225 / P6 which was the impetus for this long-winded account. It seems well made, in particular it has graduations to discern the extent of sight movement.......dah......just what the MGW Pro sight pusher does not have which I fabricated some movement graduations on their sight pusher, with the precision of the mill. The factory sight tool also has two screws to impart tension to the pawl of the slide underside to stabilize it against forces during the process. The MGW pro sight has specific "shoes" that accomplish the same task in a more comprehensive manner.
Finally, legacy forum member RCModel had a thread on improving the P6 with a substitution of a P225 hammer spring, which I did
contemporaneously.