The UAS-VZP Tactical Folding Buttstock w/ Cheek Piece,incorporates a Polymer Joint and provides you with a supreme tactical upgrade for your VZ 58. Advantages: Imbedded Adjustable Cheek Piece Design Will Allow Appropriate Clearance for Trigger in Folded Position Tough and Robust Design Slim and Low Profile Rubber Butt Plate for Reducing Recoil and Slipping TACTICAL KNUCKLE FEATURES: Push Button to Release locking, when Open, Spring lock on folded position, Pull to open and Lock from the Folded Position May be Mounted to Fold Left Side or Right Side (designate during purchase)