SIG MCX LVAW ‘Black Mamba’ 300 Blackout (300BLK) Piston AR SBR/PDW Features Demo: Subsonic/Supersonic Ammo Adjustment, Slimline Folding Stock, Tactical Handguard/Rail Removal (Video!) SIG SAUER SIGTac SB15 Pistol Stabilizing Brace for One-Handed ...