Beretta 1301 extension kit in a single package for Tactical model. Features MXT magazine extension designed exclusively for the 1301 Tactical Beretta 1301 extension increases magazine capacity to 7 rounds (capacity determined with 2 3/4a ^2 shells and may vary with shells of differing length) Barrel clamp kit includes 1301 Tactical-exclusive clamp, Picatinny rail, and QDA swivel attachment Utilizes factory magazine spring (spare generic spring included)