The Mossberg 590T FLEX is a 12 gauge pump-action tactical shotgun built on the 590 platform, with a 20-inch barrel and 8+1 capacity. The 3-inch chamber takes both 2 3/4-inch and 3-inch shells. A synthetic adjustable stock, recoil pad and forend can be changed without tools through the FLEX Tool-less Locking System. A tang-mounted manual safety works for right- or left-handed shooters, and a bead sight provides the aiming reference. Overall length is 41 inches.

In Indiana the statewide firearms deer season runs November 14 to 29, 2026, and the muzzleloader season follows from December 5 to 20, 2026. Shotguns from 10 to 28 gauge firing slugs are legal for deer, and hunter orange is required. The tool-less changes to stock, recoil pad and forend suit a buyer who sets one shotgun up for different users or uses. Check the Indiana DNR regulations before you hunt.

Key features

• 12 gauge pump action, 8+1 capacity
• 20-inch barrel, 3-inch chamber
• Tool-less adjustable synthetic stock and forend
• Tang-mounted manual safety, usable by either hand
• Blue/black finish with bead sight

Firearms ship to an Indiana FFL dealer, where you complete Form 4473 and pass the NICS check before pickup.