The Browning X-Bolt X-Lock Scope Mount System features precision-engineered aluminum construction with a matte black finish designed specifically for 1-inch scope tubes and low-profile mounting.Browning 12501 X-Bolt X-Lock Scope Mount System1-inch scope tube compatibilityLow ring height with 0.400-inch mount height2-piece base system with rings includedDurable matte black aluminum constructionX-Lock mounting technology for secure attachmentEngineered for Browning X-Bolt rifles this mounting system provides a stable reliable platform for your optics with the convenience of included rings for complete scope installation.