Description

The Mossberg 590A1 M‑LOK is a tactical 12 gauge pump‑action shotgun built to Mil‑Spec durability standards with a forend featuring integrated M‑LOK slots for mounting accessories like lights, grips, or lasers. It’s part of the long‑running 590A1 family of rugged utility/design‑tested shotguns used by military, law enforcement, and civilian shooters. The M‑LOK forearm enhances modularity compared with traditional “corncob” style forearms.

Specifications

• Model: Mossberg 590A1 M‑LOK (Black synthetic furniture)
• Type: Pump‑action shotgun (manual)
• Gauge: 12 gauge
• Chamber: 3″ shotshells (accepts 2 ¾″ & 3″)
• Barrel Length: ~18.5 inches
• Barrel Finish: Parkerized steel (matte black)
• Capacity: 6 + 1 
• Action: Pump, with dual action bars and steel‑to‑steel lockup 
• Forearm / Forend: M‑LOK‑compatible synthetic (slots on sides and bottom for modular attachment)
• Stock / Furniture: Black synthetic stock and M‑LOK forend
• Sights:
  • Standard models: Bead front sight
  • Some variants: Ghost ring rear and bright front sight setup

• Safety: Top‑mounted ambidextrous tang safety
• Magazine Tube: Fixed tubular magazine; clean‑out cap for maintenance
• Overall Length: ~39.5 inches
• Length‑of‑Pull: ~13.87 inches
• Weight: ~7 lbs unloaded
• Finish: Black synthetic furniture with parkerized metal parts

Key Features

Modular M‑LOK Forend

• Integrated M‑LOK slots on the forearm allow easy attachment of accessories such as rail sections, lights, vertical grips, or sling mounts without adding bulky tri‑rails.

Duty‑Grade Construction

• Built with a heavy‑walled barrel, metal trigger guard and safety, and dual extractors for enhanced reliability.

Tactical/Utility Ergonomics

• Black synthetic stock and forend are designed for durability and use in varied conditions; top safety is easily reached by right or left‑handed users.

Accessory‑Ready Design

• The M‑LOK forearm and drilled/tapped receiver enable users to add lights, optics, grips, or other gear (with appropriate mounts) without extensive gunsmithing

Usage

• The 590A1 M‑LOK blends the long‑established Mossberg pump‑action reliability with modern modular features, making it suitable for tactical, home defense, security, and range use, or as a base for customized configurations.