Custom Viridian matched fit Your S&W M&P 9mm/.40 S&W with 3 or 4 Barrel for smoother holstering faster drawing - Automatically secures your weapon when you holster it (Level two retention) - Optimum button pressure for positive retention extreme draw speed - TacLoc button places finger in ideal postion to activate laser/light - Pro preferred mid ride position - Proven Kydex construction - Includes adjustable belt loop - compatible with BLACKHAWK! 3 bolt platform for customization opportunities