Pull through design offering quick deployment Advanced steel hinge design locks in both folded and extended positions US veteran designed and proudly made in the USA A low-profile, left side-folding, strut design compatible with all platforms utilizing an M1913 interface at the rear of the receiver. The FS1913 is a complete assembly offering pull-through opening and a solid lock-up when extended.table.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }