The FSA-12G Shotgun unlocks at level 30 and appears as the AA-12 (Steakout 12G Shotgun).
Balance/Stat-wise it's faithfully recreated from PAYDAY 3's version of the weapon. Certain stats not present in PD3 were taken from the IZHMA 12G Shotgun with slight alterations.
KNOWN ISSUE:The magazine clips into the magwell/receiver during reload animations, as well as being slightly delayed during an empty reload. And the left hand doesn't align with the charging handle during an empty reload. Doesn't affect gameplay. Just a slight eyesore. Sorry.