This is a Adaptive Tactical known as the Sidewinder Venom chambered in 12 Gauge 2.75", model AT-00101.
The Sidewinder Venom(TM) pre-configured magazine-fed shotgun system combines Adaptive Tactical's state-of-the-art 5 round Box magazine with the Maverick 88(TM) security model shotgun. Its lightning-fast reload action cycles 12 gauge rounds consistently and reliably for the ultimate in performance for defense" range or competition.
Features:
Rapid Reloads and Increased Ammunition Capacity
Durable Polymer and Alloy Construction
Ambidextrous Design