the ncstar ultimate sighting system gen 2 3-9x42 p4 sniper with micro dot is a tactical scope for mid to long range and features zoom magnification for further target acquisition.It also has dual blue and green illumination for different lighting conditions.It includes a gen 2 red micro dot optic for quick target acquisition for close range engagements.The scope is at the proper height for m4/m16 and ar15 rifles and carbines.It features bullet drop compensation for 55 grain fmj 5.56 nato ammo and a locking quick release mount.