Mossberg 590M Shockwave Breacher 12 Gauge, M-LOK

The Mossberg 590M Shockwave Breacher is a compact, magazine-fed 12 gauge pump-action shotgun built for close-quarters and security-oriented roles where maneuverability is a priority. It pairs a heavy-walled short barrel with a shockwave-style grip and M-LOK forend to deliver a compact, utilitarian package. Standard pump-action components such as dual extractors, steel-to-steel lockup, and a top-mounted ambidextrous safety are included in the design.

Key Specifications

• The gauge is listed as 12 Gauge across source data.
• The action type is specified as Pump-Action.
• The maximum chamber is listed as 2.75 inches in source specifications.
• The barrel is described as heavy-walled in product details.
• The barrel length is reported inconsistently across sources and is not presented here as a single definitive value.
• The forend is specified as an M-LOK forend for accessory mounting.
• The magazine is identified as a detachable box magazine, though reported capacity varies between sources.
• The receiver is noted as drilled and tapped in some product text, but this is not consistent across all source fields.
• The safety is described as a top-mounted ambidextrous control.
• The unloaded weight is given as 6.3 lbs in source attributes.

This Mossberg 590M Shockwave Breacher combines compact handling and a magazine-fed layout with proven pump-action reliability for users who need a short, maneuverable 12 gauge platform. Its heavy-walled barrel, M-LOK-compatible forend, and ambidextrous controls provide a practical feature set for close-range security and utility roles, while the detachable magazine format supports rapid reloads and capacity options as reported by the manufacturer.