Career ULTRA 9mm
More velocity and a more consistent shot curve. The power wheel feature allows you to back it off to the factory performance if needed. The following chrony results were with a 3000 psi fill using .360 round ball ammo in FPS:
Factory 917 912 901 898 884 871
Tuned 981 995 1006 999 984 973
Price $275 plus shipping includes power tune, new seals, trigger job.
I can custom fit a new bolt to your gun if it is worn and cutting bolt o-rings, add $150.