Home / Accessory-Barrels / Heckler and Koch (HK USA) THREAD CAP MARK 23 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 Wilson Combat BARREL GLOCK 19 9MM 4.02″ SS $19595 Sale! FN BBL AR-15 5.56MM 18″ M16 RIFLE $29900 Original price was: $29900.$27441Current price is: $27441. Sale! SilencerCo BARREL HK VP9 9MM 1/2X28 TPI $16900 Original price was: $16900.$14408Current price is: $14408. Sale! FN BARREL AR-15 5.56MM 14.5″ $39900 Original price was: $39900.$35395Current price is: $35395.