Q Ar-15 Shorty Stock Wrench Castle Nut, TOOL-WRENCH-SHORTYSTOCK. Here is the tool you need to take off your Shorty Stock. Specifications for Q Ar15 Shorty Stock Wrench Castle Nut: Manufacturer: Q Condition: New Gun Make: AR Platform Gun Type: Rifle Gun Model: AR-15 Package Contents: Q Ar15 Shorty Stock Wrench Castle Nut Q TOOL-WRENCH-SHORTYSTOCK: Ar-15 Shorty Stock Wrench Castle Nut