Home / hide-from-search / Parts Custom Quote USC Stock Parts Custom Quote USC Stock$5000 Category: hide-from-search Product ID: 8348 Used HK USC buttstock assembly. Product is out of stock Notify me when this product is back. Please enter a valid email! Subscribe Description Description Used HK USC buttstock assembly. You may also like… Out of stock B&T Type HK MP5 Removable Top Rail $6900 Out of stock HK MP5 A3 Factory Collapsible Stock $89900 Out of stock HK MP5 40/10 Factory Duel Mag Clamp/Coupler $8900 Related products Sale! HK UMP 10mm Conversion Kit Bolt and Barrel from: $69900$49900