Home / Accessory-Barrels / Heckler and Koch (HK USA) THREAD CAP MARK 23 View cart “CANIK BARREL TP9 SF 9MM BLK 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 BARREL AR-15 5.56MM 14.5″ $39900 Original price was: $39900.$35395Current price is: $35395. Sale! Springfield Armory XDM 10MM 4.5″ THREADED BARREL $15999 Original price was: $15999.$11882Current price is: $11882.