Home / Accessory-Barrels / Heckler and Koch (HK USA) THREAD CAP MARK 23 View cart “Shadow Systems BARREL 9MM FS BRZ FLT” has been added to your cart. Heckler and Koch (HK USA) THREAD CAP MARK 23$3099 Only 1 left in stock Heckler and Koch (HK USA) THREAD CAP MARK 23 quantity Add to cart SKU: 970174 Category: Accessory-Barrels Product ID: 41553 Description Description Related products Sale! SilencerCo BARREL HK VP9 9MM 1/2X28 TPI $16900 Original price was: $16900.$14408Current price is: $14408. Sale! Shadow Systems BARREL 9MM CPT BRZ FLT TB $23400 Original price was: $23400.$19156Current price is: $19156. Sale! FN BBL AR-15 5.56MM 16″ M16 MID $29900 Original price was: $29900.$27441Current price is: $27441. Sale! Shadow Systems BARREL 9MM FS BLK FLT $21100 Original price was: $21100.$17348Current price is: $17348.