3 magazine
(1 that shorten the mag for increased concealment, 1 that lengthen the mag for increased capacity, 1 that houses 9mm caliber for increased damage)
muzzle shroud
rail-less body modification
This mod also changes the vanilla 'extended mag' into "Dual Mag" that instead confer speed reload bonus.
This mod also gave Akimbo Skorpion SMG access to 2 stock attachment, that are usable by the single-secondary version of the gun.