Mossberg 930 Hunting All Purpose Field Blued/Walnut 12 Gauge 3in Semi Automatic Shotgun - 28in -930 models feature a "quick empty" magazine button for easy unloading, a cocking indicator that protrude from inside the trigger guard, and a drilled and tapped receiver for convenient scope base installation. Dual gas-vent system Ported barrels Quick-empty magazine release button for easy unloading Drilled and tapped receiver Adjustable drop at comb with stock drop spacer system on synthetic models