1992 22/45 Mk II. Clarke trigger, Volq. sear/spring, lightened hammer, titanium FP and muzzle brake (adds weight up front; longer sight plane). Screw in trigger adjusted so it "breaks plus a little more". Skateboard tape added to grip makes it "stick" to the hand, sweat or no sweat! Doesn't recoil up much in the hand. Just kinda' "pops" with a little push straight back/vibration on firing. Way, way better than I am at this point in time.