The design for the EOTECH On-Gun Laser (OGL) focuses on human performance factors under extreme stress creating the premium choice for professional users. The machined aluminum housing provides extreme durability in a compact package roughly the size of a standard deck of playing cards.Features :All Aluminum Housing for Extreme DurabilityShared Optical Bench for Visible Green and IR Aiming Lasers"Modlite ModButton Lite 7" Switch Included"Crane-Type Laser Port