This is an informational post for J-Frame owners.   I just installed the Apex Tactical Duty/Carry Spring kit in my S&W 442. The total time to install took about 15min, and that was going slow. 1st time I ever took apart a revolver. Required skill level is minimal. Any DIY'er should have no problem. I measured the trigger pull on my Lyman digital scale. Trigger pull before was OVER 12lbs (the scale only goes up to 12lbs and couldn't measure it). Trigger pull after is 9lbs. 9lbs is e