SSR Special Weapons
The weapon does have powered systems as well as a sturdy frame to ensure that the plasma bolt does not overwhelm the hardened carbide steel barral and distroy the weapon, killing the user in the process.
The plasma rounds themselves are small, but contain a massive amount of energy within them. Encased within a tritainum/duranium shell, the plasma energy is ignited by the subspace accelerator as it flung out of the rifle muzzle at near C. Upon impacting the target, the combination of the kinetic impact of shell and plasma mass, as well as the plasma's energy itself is devastating upon both unshielded and lightly shielded human size targets.