The SMG or Sub-Machine-Gun is a secondary weapon in Sanctum 2, unlocked for reaching Rank 14.
The SMG is a full-auto sub-machine-gun with an 80 round clip. It deals moderate damage. The secondary fire shoots a cluster of poison darts that deal damage over time to enemies that consumes 20 rounds per use. The poison damage stacks for each poison dart in the enemy, allowing for massive damage over time.