Crimson Trace Lasergrip LG403R for Ruger Mark II and Mark III Crimson Trace LG-403R, Red Laser Dual Side Activation Fits all steel frame Ruger Mark II and Mark III models excluding 22/45. Red Laser Replacement Grip This laser is in conformance with and complies with 21 CFR 1040.10 with a maximum power output of "5mW" for a "Class IIIA" laser.