The SSP18 Rectangular Amplifier in red is designed to amplify the sound emitted from the gun barrel through a conical opening at the muzzle end. This feature can be utilized to intimidate opponents or keep them concealed. It boasts a full CNC hard-anodized construction and is holster-friendly. The amplifier is compatible with all ~16mm OD thread covers, although a thread protector is required for mounting on the SSR90.