ThunderCan Integrally Suppressed uppers, the perfect marriage of form and function. Our Integrally suppressed uppers offer fully serviceable configuration, proprietary free float gas blocks and unparalleled sound reduction. Fully complete systems come paired with Aero Precision uppers and forearms just waiting for your lower. Our integral platforms are shorter OAL than a standard barrel mounted suppressed rifle, meaning the suppressor volume is increased by using over the barrel air space. Decibel reduction is typically improved by 15-20% compared to a standard barrel mounted suppressor.