Firearm attachments, namely, modular external rail systems for attaching accessories to firearms; Firearm attachments, namely, modular external rail systems for firearms; Firearm hand guards; Firearms; Adapter inserts for firearms to allow for use of different gauges and calibers of ammunition; Ammunition for firearms; Barrel reflectors for firearms; Breeches of firearms; Case covers for firearms; Cleaning brushes for firearms; Cleaning rods for firearms; Covers for firearms; Foresights for firearms; Grip tape for firearms; Non-telescopic gun sights for firearms; Silencers for firearms; Sling straps for firearms; Stands for firearms; Supplemental chambers for firearms; Triggers for firearms; Weapon cases for firearms