This is a Nordic Components Shotgun Magazine Tube Components known as the MXT, model MXT-BR1301TAC-PKG.
The Beretta 1301 extension increases magazine capacity to 7 rounds (capacity determined with 2 3/4" shells and may vary with shells of differing length). Barrel clamp kit includes 1301 Tactical-exclusive clamp" Picatinny rail" and QDA swivel attachment.
Features:
Spare Generic Spring Included
Increases Magazine Capacity to 7 rounds with 2-3/4 Shells;QD Sling Attachment
