Item #:
873750008530
UPC: #:
873750008530
availability:
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Magpul SGA Stock MAG490-FDE Mossberg 500/590/590A1 12GA Flat Dark Earth

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The Magpul SGA Stock transforms standard Mossberg shotguns into precision platforms with enhanced ergonomics and adjustability. This drop-in replacement stock addresses the shortcomings of factory furniture through modern polymer construction and user-configurable geometry.

What Makes This Different

Unlike traditional fixed stocks, the SGA features a modular cheek riser system and length-of-pull spacers for custom fit across different body types and shooting positions. The stock's reinforced polymer construction weighs 40% less than comparable wood alternatives while maintaining structural integrity under heavy use. Internal steel reinforcement plates distribute recoil forces across the receiver interface, reducing stress concentrations that can crack standard stocks.

Key Features

  • Drop-in installation for Mossberg 500, 590, and 590A1 12-gauge shotguns
  • Adjustable cheek riser with 0.25" and 0.50" height options
  • Three length-of-pull configurations: 12.625", 13.125", and 13.625"
  • Flat Dark Earth finish matches military and law enforcement color schemes
  • QD sling swivel socket compatible with push-button slings
  • Textured grip surfaces provide secure hold in wet conditions
  • Steel reinforcement inserts at critical stress points
Field performance demonstrates the SGA's versatility across tactical and sporting applications. The adjustable comb height accommodates both iron sights and optic configurations without requiring permanent modifications. Competition shooters benefit from the consistent cheek weld, while law enforcement users appreciate the quick length adjustment for different gear configurations. The stock maintains zero shift through temperature cycles from -30°F to 140°F, meeting military durability standards.

Technical Specs

  • Weight: 1.6 pounds
  • Overall length: 8.75 inches
  • Material: Glass-filled nylon polymer with steel reinforcements
  • Finish: Flat Dark Earth (FDE) Cerakote-style coating
  • Compatibility: Mossberg 500, 590, 590A1 12-gauge only
  • Includes: Stock, cheek riser kit, LOP spacers, installation hardware
  • Country of origin: United States
  • Manufacturer warranty: Limited lifetime against defects
The SGA Stock represents a significant upgrade over factory components without requiring gunsmithing or permanent modifications. Professional armorers and recreational shooters achieve identical installation results using basic hand tools. This combination of performance enhancement and user-friendly installation makes the SGA an immediate improvement for any Mossberg platform.