The SB Tactical TF1913-01-SB is a low-profile, left-side-folding brace assembly engineered for platforms with a rear M1913 Picatinny interface. Its strut-style profile preserves a compact configuration while providing a solid, dependable lock-up when extended.Designed for straightforward integration, the complete assembly combines an advanced steel hinge with a rigid polymer substrate and flexible arm cuff. Dual-position locking supports secure folded storage and stable extension across compatible systems.Complete assembly, ready to install.Steel hinge locks in folded and extended positions.Fits rear M1913 interfaces, including SIG MPX, MCX, Rattler, and Rock River LAR-PDS.Verify receiver interface compatibility carefully before installation.