This is a genuine CZ-USA part#19992. One in stock $69.99
SCORPION EVO 3 S1 PISTOL ARM BRACE KIT
ENABLES THE ADDITION OF AN AFTERMARKET ARM BRACE OR
OTHER PISTOL BUFFER TUBE ACCESSORY
ADAPTER IS MADE OF 6061 T6 ALUMINUM, FLAT BLACK ANODIZED
BUFFER TUBE MADE BY KAK INDUSTRIES SPECIFICALLY FOR FITMENT
OF AN AFTERMARKET ARM BRACE
THREADS ON ADAPTER (1-3/16x16) ARE STANDARD TO ACCEPT ALL
AR-15 BUFFER TUBES/RECEIVER EXTENSIONS