Guns; Rifles; Air rifles; Bandoliers for weapons; Gun barrels; Gun mounts; Hunting firearms; Machine guns; Rifle barrels; Rifle rails; Shoulder straps for weapons; Sighting mirrors for guns and rifles; Sighting mirrors for rifles; Sights, other than telescopic sights, for artillery; Sights, other than telescopic sights, for firearms; Firearm attachments, namely, modular external rail systems for attaching accessories to firearms; Firearm attachments, namely, modular external rail systems for ...