The BlasTech 4 represented a model of blaster weapon crafted by BlasTech Industries. It was utilized for individual defense purposes during the era of the Galactic Republic. Zeerid Korr, a one-time smuggler, possessed a pair of BlasTech 4s, which he kept in holsters at his hips. At times, he would switch them out for an E-3 blaster carried in an ankle holster. In the year 3653 BBY, while on his farm located on the planet Dantooine, a BT7 Thunderstrike landed at the farm. Korr's initial thought was that the Exchange, a criminal syndicate, had arrived to kill him because of his failure to fulfill his commitments to them. At that moment, he had his E-3 blaster, but he would have preferred to have his two BlasTech 4s. However, the starship held his friend and former Jedi Knight Aryn Leneer.
The novel The Old Republic: Deceived by Paul S. Kemp, published in 2011, featured a reference to the BlasTech 4.