Mossberg 590RM 12 Gauge 2-3/4in Phosphate - 18.5in - The 590RM Rotary Safety Selector shotguns utilize the first production double-stack magazines made for pump-actions - providing more efficient capacity vs. length than competitive designs. Plus, they combine time-tested Mossberg durability with ground-breaking new features like a rotary safety selector; a compact, ergonomically-designed forend, and an integrated barrel/heat shield combination. Features: Ambidextrous AR-Style Rotary Safety Selector 10-Round Detachable Magazine 18.5" Barrel with Integrated Heat Shield Enlarged, Beveled Loading Port with Exposed Follower Flat Profile Trigger with smooth, crisp break 5-Position Adjustable Stock withMOE Pistol Grip, Interchangeable Recoil Pad, 2 QD Ports Top Picatinny Rail for AR-Style Optics