The 12ga ( 3" - 3.5" ) Retay Masai Mara is a lightweight high performance semi-automatic shotgun that features the Patented Inertia Plus (TM). The Masai Mara is world's most advanced kinetic energy driven rotating bolt design shotgun and offers unsurpassed reliability in all conditions. The Retay Inertia Plus(TM) is capable of effectively cycling lightweight and low recoil shotgun shell loads as well as heavy hunting loads and eliminates misfires by ensuring the system's rotating bolt locks into the battery with the chamber under all conditions.