CT Brushline 4-12x40 Brushline BDCPeak Performance in any enviorment Consistent lifelong reliability Boresight Retention Battery Immersion Testing The Crimson Trace Brushline 4 12x40mm scope with Crimson Trace's custom BDC Reticle is the classic higher power hunting scope with a modernized BDC reticle. The diamond shapes in the reticle allow for three distinct aiming points per diamond. This scope boasts a 1 tube made of aerospace grade aluminum, making it lightweight yet durable. It