THE PERFECT BALANCE: Browning Iridium sound moderators were developed to provide hunters and shooters with the perfect balance between size and performance. You will benefit from a reliable, high performance and accurate product that allows you to keep your movements fluid and simple to use. -30 dBc. Monolithic high-performance design. Perfect precision. Collision baffles. Main material: aluminium. Perfect sizing. Over-barrel design. Streamlined transition design. Anti-reflex surface. First baffle with stainless steel thread. Gas counter core.