The 2-7x32mm AO Airgun Riflescope from Barska is constructed to withstand the additional reverse recoil produced by airguns. The AO Airgun Riflescope features an adjustable objective (AO) to adjust for multi-range parallax error. The AO allows the scope to deliver continuous accuracy and precision. There are fully coated optics and a ranging Mil-Dot reticle. The 1 Inch tube comes with scope caps. It is waterproof, fogproof and shockproof. This scope is ideal for competition and recreational shooting and is backed by Barska's Limited Lifetime Warranty.