FAB Defense AGM-500 FK M4-Style Collapsible Buttstock Mossberg 500/590/Maverick 88

The FAB Defense AGM-500 FK is an M4-style collapsible buttstock purpose-built for 12 gauge Mossberg 500, Mossberg 590, and Maverick 88 pump-action shotguns. Designed as a tactical aftermarket replacement stock, it brings AR-pattern ergonomics and an adjustable platform to the Mossberg pump line, making the host shotgun faster to shoulder, easier to manipulate, and more adaptable to body armor or different shooter sizes.

Construction centers on a rugged black polymer build with an integrated ergonomic grip interface and a recoil-absorbing buttpad for improved comfort under sustained fire. The M4-style design collapses down to a compact 11.14 in (283mm) and extends to 13.74 in (349mm) when deployed, allowing the user to dial in length of pull on the fly. At approximately 560 grams, the stock adds modest weight to the host shotgun without upsetting balance.

Sold as a brand new aftermarket buttstock, ready to install on a compatible Mossberg-pattern receiver. Ideal for tactical, defensive, home-defense, and competition shotgun applications where AR-style ergonomics are desired on a pump-action platform.

• Fits Mossberg 500, Mossberg 590, and Maverick 88 12 gauge shotguns
• M4-style collapsible design with adjustable length of pull
• Rugged black polymer construction with recoil-absorbing buttpad
• Length: 11.14 in collapsed / 13.74 in extended (283mm / 349mm)
• Width: 49mm, Height: 142mm, Weight: approximately 560 grams
• Made by FAB Defense, Israel