13 Silencers for firearms; Sights, other than telescopic sights, for firearms; Accessories for firearms, namely, silencers, sound moderation devices, and noise suppressors; Accessories for firearms, namely, silencer components, namely muzzle brakes, flash hiders, pistons, piston housings, fixed mounts, barrel spacers, spacers, adapters, thread inserts, thread protectors, front caps, and front cap tools; Accessories for firearms, namely, flash moderation components, namely muzzle brakes, flash hiders, pistons, piston housings, fixed mounts, barrel spacers, spacers, adapters, thread inserts, thread protectors, front caps, and front cap tools