Designed and developed expressly for Mauser's 98 and M 12 actions, the Hexalock mount series incorporates six locking lugs to enable a scope to be mounted and removed without losing zero, additionally providing maximum shooting stability. A very reliable, yet simple, mount! What else would you expect from Mauser? Note: As of 2021, any Mauser M12 with a serial number greater than 3000 uses the Remington 700 mounting contour. Mauser M12 Hexalock 30mm Scope Mount 80214942