The A300 blaster rifle, alternatively referred to as the A-300 blaster rifle, represented a blaster rifle produced by BlasTech Industries. Its design bore resemblances to the A280 blaster rifle and it was nearly indistinguishable from the A280-CFE. A significant number of Rebel Alliance Special Forces operatives within Rogue One employed it during the Battle of Scarif.
The A-300 incorporated a power cell compartment alongside a modifiable electroscope. This weapon was available in a number of different forms. The shortened version of the A-300 featured a shortened barrel along with a detached shoulder stock. The standard rifle version included a lengthened barrel and a shoulder stock. Moreover, it was adaptable into a sniper rifle through the substitution of the barrel with an air-cooled barrel casing, visually akin to that of the A310 rifle.