BSA AIR3-9X40AOTB. 40mm objective, Mil-Dot, Adjustable objective, trapped blister. The new OUTLOOK series air rifle scopes were specifically designed to withstand the reverse recoil found in the most-powerful air rifles. This series offers fully multi-coated lenses, fast focus, an adjustable objective, low profile zero-reset turrets and a Mil-Dot reticle. This series comes standard with two-piece dovetail rings. Matte black finish. Waterproof, Shockproof and Fogproof.