3 .351winchester Moderator Nov 12, 2006 #2 Dunno the M2. M1 is auto, M3 is a pump/auto convertable like a practical sized SPAS 12 Main advantage being auto firepower but the ability to manually cycle via slide/pump action, loads that would be too light for the auto
Dunno the M2. M1 is auto, M3 is a pump/auto convertable like a practical sized SPAS 12 Main advantage being auto firepower but the ability to manually cycle via slide/pump action, loads that would be too light for the auto