Mossberg 990 Aftershock SPX 12 Gauge
This guide details the operation and optic mounting for the Mossberg 940 Pro Aftershock SPX 12 Gauge shotgun. It covers retrieving the firearm from storage, understanding its gas-operated action, and utilizing the bird's head grip. The process of mounting an optic like the Holosun EPS Carry to the receiver's Shield RMSc footprint is highlighted, emphasizing the firearm's optic-ready capability. The guide concludes with a reminder of the available color variants and essential safety precautions.










