My first semi auto shotgun so i had to choose the best. Benelli m4 : r/ Shotguns
Browning A5: A History | Split Reed
Sage & Braker Mercantile - CARE OF THE BROWNING AUTO 5 The Browning Auto 5 is legendary. Holding the title as the first semi automatic shotgun, it was designed by none other
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A Look Into The History Of Semi-Auto Shotguns - Wildfowl