Bushmaster has decided to throw its hat in the ring with the release of the Bravo Zulu 11.5” 300BLK complete upper receiver assembly. With ammunition available starting at 110gr through 220gr subsonic, 300BLK has emerged over the years as a versatile cartridge, popular amongst shooters, especially in short-barreled and suppressed applications. While the entry into this cartridge comes a little late in the game, any addition from Bushmaster is always a welcome contribution.