Magpul SGA Stock for Mossberg 500/590/590A1 12 Gauge Shotguns

The shotgun stock that finally fits — Magpul's SGA transforms how a Mossberg 500-series mounts, points and recoils.

The Magpul SGA Stock for Mossberg 500/590/590A1 (MAG490) replaces the factory stock with a purpose-engineered design built around adjustable fit. Spacer-based length-of-pull adjustment tailors the stock to your build and your outerwear — shorter for armour or winter kit, longer for slighter frames in shirtsleeves — while the recoil-reducing buttpad takes the sting out of full-power 12-gauge loads.

The grip geometry is closer to vertical than a traditional field stock, giving better trigger control and a more natural wrist angle for defensive and working guns. Reinforced polymer construction, optional cheek risers for optics and sling mounting points complete a stock that turns a rattly factory pump into a fitted tool.

Why shooters choose the SGA (Mossberg)

• Spacer-adjustable length of pull — fit the gun to you, not vice versa
• Recoil-reducing buttpad — tames full-power 12-gauge loads
• Improved grip geometry — better trigger control and wrist angle
• Riser & sling compatible — supports optics and carry setups
• Four finishes — Black, Flat Dark Earth, Stealth Gray, Orange

Fit & installation

Fits Mossberg 500, 590 and 590A1 12-gauge shotguns using standard stock hardware — a straightforward bench job with basic tools. Set spacers before final torque.

Specifications

• Model: MAG490
• Platform: Mossberg 500, 590 & 590A1 (12 gauge)
• Adjustment: Spacer-based length of pull
• Material: Reinforced polymer
• Finishes: Black, Flat Dark Earth, Stealth Gray, Orange

Make the shotgun yours. Order the SGA for Mossberg today — in stock at Xtreme Tactical Gun Parts with free UK delivery.

Explore more: Magpul Shotgun Stocks & Forends, Rifle & Shotgun Stocks or browse all Magpul.