Timney Trigger CZ 452 LR and 17 mach2 ** This is not a drop in trigger - requires gunsmithing **

Timney Trigger CZ 452 L Item #452 (Fits 17 Mach II and .22 Long Rifle) Adjustable from 2- 3.5lbs 

This is not a drop in trigger, take approx 1.5 hours to fit and trigger is set at 3.5lbs factory and is not advised to be adjusted or it may bugger the trigger.

Timney website says 2lb to 3.5lb but this depends on how firm your mainspring/firing pin spring is in your bolt, the weaker your mainspring, the closer to 2lb we can get, so its dependent on your firearm.