BSA 2239X40AOW: The BSA Sweet series of scopes incorporates trajectory compensation technology, a feature originally developed for use in military snipers. These scopes come equipped with a quick-change turret system that is specifically calibrated for multiple grain weights for a variety of calibers, including .17HMR, .22LR, .223, .243, and .270. The BSA Sweet 22 AO Compact is specifically designed to optimize performance for the Ruger 10/22 and other small-frame .22 rifles. This scope boasts a long eye relief for comfortable viewing and an adjustable objective. Additionally, it is fitted with our sought-after 30/30 reticle. Included standard are 2pc dovetail rings and fully coated anti-reflective lenses, all encased in a seamless one-piece aluminum housing for enhanced durability and performance.