The A300 blaster rifle, alternatively referred to as the A-300 blaster rifle, represented a blaster rifle produced by BlasTech Industries. Its design bore resemblance to the A280 blaster rifle and was nearly indistinguishable from the A280-CFE. A notable instance of its use was by numerous Rebel Alliance Special Forces operatives belonging to Rogue One during the Battle of Scarif.
The A-300 incorporated a compartment for a power cell and also featured an electroscope that could be adjusted. This weapon was available in a number of different configurations. The A-300's compact variant featured a barrel that was collapsed, along with the removal of the shoulder stock. The rifle configuration included both an extended barrel and a shoulder stock. Furthermore, by swapping the barrel for an air-cooling barrel shroud, which shared a striking resemblance to the A310 rifle, it could be transformed into a sniper rifle.