The recoil master is designed for one purpose - to reduce felt recoil. It decelerates the slide before full stroke with a secondary spring. This allows a softer felt recoil helping you to shoot faster follow up shots.
The light system is designed for 1911/2011 3.9" 9mm and open pistols with bull barrels. For proper use, you must be able to remove the guide rod from the rear of the slide.
