Abstract: A single shot falling breech block rifle action with features to allow takedown and barrel changes to accommodate different rifle caliber and chambers. The action incorporates an automatic safety which blocks the internal striker. The compact design utilizes a small number of individual components. Maximum use is made of parts which may be obtained commercially with high precision at reasonable cost. The trigger mechanism and striker share a common pivot point and reduce the requirements for external adjustments. The extractor is effective with rimmed or rimless belted cases in present use.