Safariland 6004 Glock 21 w Surefire X200/X300 Tactical Holster, Left Hand, STX Black SLS (Self Locking System) allows for a smoother single motion draw-and greater protection against a weapon takeaway Suede Lined to Protect Handgun Finish Standard double strap leg shroud with mounting holes for optional accessories Safari laminate Thermal Molded construction protects the handgun and sights Features the SLS (Self Locking System) rotating hood system SLS allows for a smoother, single-motion draw and greater protection against attempted weapon takeaways Thermal-molded SAFARILAMINATE construction protects handgun and sights Standard double leg strap and leg shroud with mounting holes for optional accessories.