Holosun LS117R Class IIIa Collimated Red Laser Sight with QD Release Mount. The LS117G is a class IIIa green laser aiming device designed for long gun applications. The LS117G features a 7075-aluminum matte black anodized housing with a quick release Picatinny rail mount. The LS117G is powered by two included CR2 lithium batteries which can provide up to 5000 hours of battery life. The rear facing selector switch lets the user select between constant ON, OFF, or activation using the included remote pressure switch. The LS117G also include tactile windage and elevation adjustments for a precision zero. This part can be used with bolt-action rifles.