The Scout Trooper only has one weapon, according to the movies: the holdout blaster pistol that he/she carries in their boot holster.
You can find replicas or makes of this blaster from different sources. Mine is a KS. It's made of wood and strong rubber. I added a coat of mat varnish to avoid any unwanted stains due to its paint.
It looks like it can be handled with either hand but I found that being left-handed just for this weapon makes more sense. See how the scope is placed strategically on the right?
The KS blaster sitting in the SC holster.
Other versions:
Polymer Armory:
The trigger is not screen-accurate.
Kenner:
Resin cast of the Kenner toy, which is a copy of the movie stunt weapons but will not fit into your holster.