Get your hands on the Stratus Support System all new Shockwave 590 Pin Combo. It replaces the rear trigger pin on the Shockwave 590 12-gauge. (Also works on any 500 series or 800 series 12 gauge Mossberg) The knuckle can be attached to the left or right side of weapon. The GEN2 Holster attaches to MOLLE or via belt. The holster accepts the knuckle and keeps the weapon secure while your hands free and is instantly deployable. A breachers favourite or from home defence. Reduces fatigue and improves weapon control while hands are free. Most effective with a sling for double connection to your weapon.