Includes 4 Sets of Cross-Rail Inserts (2 inserts each to fit GLOCK®, 1913, TSW/99, 90two), 4 Cross-Rail Mounting Cap Head Screws, Allen Wrench, and 2 CR-123 Lithium batteries. 3M PELTOR A-ZOOM AIMPOINT ATI BENCHMADE BERETTA BIRCHWOOD CASEY BLACKHAWK!