The tale follows Carter, a quiet person with a shady past, now making an honest living. A suspicious message tips him off about a crack in the mix of things, and upon turning a new leaf, finds a few skeletons in the closet.
An updated Basisk.
It was made smaller, to be more obviously concealable. The iron sight was removed to denote its primary use as a very close range weapon.
Took out the 'magazine' style grip as that implied it used ballistic ammo.
Seems pretty fitting now, as it is much further away from its modern counterpart.
Old Basisk: Moddb.com