Home / Accessory-Barrels / Heckler and Koch (HK USA) THREAD CAP MARK 23 View cart “SilencerCo BARREL HK VP9 9MM 1/2X28 TPI” 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 CPT BRZ FLT TB $23400 Original price was: $23400.$19156Current price is: $19156. Sale! Springfield Armory XDM 9MM 4.5″ THREADED BARREL $15999 Original price was: $15999.$11882Current price is: $11882. Wilson Combat BARREL GLOCK 19 9MM 4.02″ SS $19595 Walther Arms BARREL Q5 SF 9MM 5.5″ THREADED $24900