The CVA Blackhorn QR Breech Plug is specifically designed for use with Blackhorn or other loose powder muzzleloading propellants. Nothing affects performance of your muzzleloader more than a clean breech plug for consistent ignition and better overall accuracy. This stainless steel replacement breech plug is designed to work with all CVA Accura V2, Optima and Wolf models, 2010 or newer. This plug is optimal for whatever type of propellant you choose to use, either loose or pelletized. The CVA 209 breech plug allows the flash-hole to remain debris free after repeated shots with finer, loose powder propellants. You no longer need to continually clean out the flash-hole after each shot. NOTE: Breech plug will not work on the CVA Apex Models. *Only Compatible with models made 2010 and Newer*. CVA Replacement QRBP Breech Plug - 2010+ Accura, Optima, Wolf - Blackhorn - .50 and .45 caliber only AC1611BH