12 ga., with Dot Sight, with Second (Browning) Barrel, 2 3/4" Chambers, Adjustable Chokes, Semi-Auto. Did You Know ? The "gauging" system dates back to muzzle-loading days. Gauge was determined by the number of lead balls matching the diameter of the bore, that it took to equal one pound in weight. If it took 12 balls of a given bore diameter to equal one pound,that bore was said to be a 12 gauge.
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