This is a SB Tactical Stabilizing Brace known as the CZ PDW, model CZPDW-01-SB.
Designed for the CZ Scorpion Evo pistol" the CZPDW Pistol Stabilizing Brace is 3-position adjustable and features a pull-through design allowing you to quickly extend the brace without having to depress the button.
Features:
Black finish
3-position adjustable
Product includes complete assembly and adjustable nylon strap
