The Crimson Trace Brushline 3-9x40mm scope with the BDC Rimfire reticle has been optimized for the small-game hunter. This scope boasts a 1" tube made of aerospace-grade aluminum, making it lightweight yet durable. It has passed extensive environmental testing and is nitrogen-purged, waterproof, shockproof. It boasts MOC-coated ELD glass, and the aggressive knurling on the magnification ring and turret ensures effortless adjustments. All Crimson Trace® scopes are covered under a Lifetime Warranty.