Mossberg 590 9-Shot 12 Gauge 20″ Barrel 8+1

Mossberg 590 9‑Shot Tactical – 12 Gauge, 20″ Heavy Barrel, 8+1

Key Specifications

• Caliber & Capacity: 12 gauge; 8 rounds in tube + 1 in chamber; accepts 2¾″ and 3″ shells
• Barrel: Heavy-walled, 20″ cylinder-bore with heat shield option
• Stock: Adjustable FLEX 6-position synthetic or optionally pistol grip; includes side saddle shell carrier
• Sights & Safety: Single bead front; some variants include ghost-ring rear; ambidextrous tang-mounted safety
• Action & Lock-Up: Dual extractors, twin action bars, steel-to-steel lockup, anti-jam elevator
• Length/Weight: ~41″ overall, ~7.75 lb

Top Features

• Mil-spec durability: Trusted by US military and law enforcement for reliability under adverse conditions
• Adjustability: FLEX stock allows shooters to tailor length-of-pull or switch to compact configuration
• Tactical versatility: Extended capacity, ghost-ring/heat-shield variants, and M-LOK options available
• Maintenance-friendly design: Nut-and-tube magazine allows easy barrel swaps and cleaning

Performance & Use Cases

• Home Defense & Tactical: 20″ barrel provides manageable length with improved pattern density and sight radius; ideal for home defense or patrol use.
• Field & Slug Performance: Virtually no recoil surprises—at 7.75 lb, it’s stable for buckshot and slugs; reliably hits steel at 100+ yards.
• Customizable platform: Widespread aftermarket support for stocks, sights, lights, rails, and choke tubes