All aluminum construction, the S-Thunder Modular Gun Rack System - Wall Mount Gun Rack is one meter in length and can accommodate up to a maximum of 16 gun holders. Wall mounting holes are spaced 6 inches apart, center to center. Gun holders are available for M4, MP5, AK47, and G36 real guns or replicas and each of them can hold a gun weighing up to 10 Kg. The Wall Mount Gun Rack is shipped with no gun holders. Gun holders are available for order separately.