Tactical Shotgun (Terraria)

Information
The Tactical Shotgun is a Hardmode, post-Plantera ranged weapon. It is an upgraded version of the Shotgun, auto-firing six spread shots per bullet consumed (against the Shotgun's average of four), for a possible combined base damage of 174 per bullet spent (not including bullet damage stats which are then added). It has a 7.64% / 11.46% (1/13 / 1/9 ) chance to drop from Tactical Skeletons in the post-Plantera Dungeon.

Despite appearing to have a scope, the Tactical Shotgun has no inherent zoom capability like the Sniper Rifle. While the Tactical Shotgun is fully automatic, the Tactical Skeleton enemy that drops it seems to wield a significantly slower, semi-automatic version. The drum magazine on the sprite perhaps alludes the fact that it has a high capacity. The Tactical Shotgun bears similarity to the Shotgun, but with more cosmetic attachments and a more metallic structure.

Source

 * 1) Tactical Shotgun (Terraria Official Wiki)