The A300 blaster rifle, alternatively referred to as the A-300 blaster rifle, represented a blaster rifle produced by BlasTech Industries. Visually, it bore a resemblance to the A280 blaster rifle and shared near-identical features with the A280-CFE. A significant number of Rebel Alliance Special Forces operatives belonging to Rogue One utilized this weapon extensively during the Battle of Scarif.
The A-300 incorporated a compartment for a power cell as well as an adaptable electroscope. This weapon system was designed to accommodate multiple distinct configurations. The shortened version of the A-300 featured a shortened barrel and lacked a shoulder stock. Conversely, the rifle variant was equipped with both a longer barrel and a shoulder stock. Furthermore, it was possible to transform it into a sniper rifle by substituting the standard barrel for an air-cooled barrel shroud, which closely resembled that of the A310 rifle.