Home / Accessory-Stocks / Heckler and Koch (HK USA) FOLDING STOCK SP5K BLACK You cannot add "SIG SAUER MPX STOCK ADAPTER ASSEMBLY" to the cart because the product is out of stock. Sale! Heckler and Koch (HK USA) FOLDING STOCK SP5K BLACK$38700 Original price was: $38700.$33784Current price is: $33784. Out of stock SKU: 261249 Category: Accessory-Stocks Product ID: 60296 Description Description All NFA Rules Apply Related products Sale! Heckler and Koch (HK USA) VP9 OR SLIDE WITH TALL SIGHTS $40500 Original price was: $40500.$35320Current price is: $35320. Sale! Heckler and Koch (HK USA) VP9 MATCH OR LONG SLIDE $54900 Original price was: $54900.$47490Current price is: $47490. Sale! B&T TELESCOPIC STOCK HK SP5 $60000 Original price was: $60000.$55138Current price is: $55138. Wilson Combat SUPERSTOC CARB BUTTSTOCK BLK $5995