Home / Accessory-Barrels / Heckler and Koch (HK USA) THREAD CAP MARK 23 View cart “Shadow Systems BARREL 9MM FS BRZ FLT TB” 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! Shadow Systems BARREL 9MM FS BLK FLT $21100 Original price was: $21100.$17348Current price is: $17348. Sale! FN BBL AR-15 5.56MM 16″ M16 MID $29900 Original price was: $29900.$27441Current price is: $27441. Sale! FN BBL AR-15 5.56MM 14.7″ M16 MID $29900 Original price was: $29900.$27441Current price is: $27441. Sale! CANIK BARREL TP9 SF 9MM BLK TB $9599 Original price was: $9599.$8299Current price is: $8299.