Radien 300 is designed for .300 Win Mag and other 7 mm – .30 magnum calibers. Superior recoil reduction and sound suppression in non-magnum .30 calibers. Like other products in the Radien series, the suppressor is made of hard anodized aluminum. The muzzle brake is made of steel. Sound suppression 31–33 dB (.300 Win Mag).