LJ-50 concussion rifle

The LJ-50 concussion rifle was a model of powerful and deadly blaster rifle produced by Arakyd Industries. After a shipment of LJ-50s was accidentally sent to a squad in the 92nd Coruscant Engineers, the squad's armorer saw their potential for breaching walls and scattering enemy troopers and so stripped them down into blaster carbines.

The modified weapons proved undeniably effective and after the squad's superior officer was impressed by them. Word then reached Arakyd, who immediately put them into production alongside the LJ-50s as the LJ-40 concussion carbine.

Behind the scenes
The LJ-50 concussion rifle was first mentioned in the new Star Wars canon in Fully Operational, a 2018 supplement for Fantasy Flight Games' Star Wars: Age of Rebellion. The weapons originated in the Star Wars Legends continuity, where they first appeared in the 2005 video game Star Wars: Republic Commando.