This kit produces a trigger pull of around 2-1/2 lbs. Kit is for the 10/22 only and will not fit the 10/22 Magnum. Power Custom Adjustable Kit is adjustable to eliminate pre-travel. Requires disassembly of the trigger assembly for installation. Notes: Some Ruger 10/22 models will require the use of two Ruger hammer bushings for proper installation (product 510559). 10/22's that already have separate hammer bushings will not need new ones as the factory ones can be re-used.