Rotary magazine and bolt catch

A firearm, comprising:

• a receiver;
• a bolt mounted within said receiver for reciprocal motion relatively thereto between and open and a closed position;
• a finger extending from said bolt;
• a magazine well positioned within said receiver;
• an ammunition magazine positioned within said well, said magazine comprising:
• a housing for receiving said ammunition;
• a cartridge rotor mounted within said housing, said cartridge rotor being rotatable relatively to said housing about an axis for advancing said ammunition through said housing;
• a spring positioned within said housing for rotating said cartridge rotor about said axis;
• a cam attached to said cartridge rotor and rotating therewith about said axis;
• a body mounted on said housing proximate to said cam, said body being slidably movable into an extended position wherein a portion of said body projects from said housing;
• a cam follower mounted on said body, said cam follower being engageable with said cam, rotation of said cam sliding said body into said extended position upon engagement of said cam and said cam follower;
• said firearm further comprising a bolt catch movably mounted within said receiver, said bolt catch comprising:
• a first surface engageable with said portion of said body;
• a second surface engageable with said bolt, said second surface comprising a hook;
• wherein
• when said body moves into said extended position, said bolt catch is moved into a position wherein said second surface engages said bolt such that said hook captures said finger, the hook and finger having non-parallel engagement surfaces that prevent movement of the bolt catch away from the bolt to allow release of said bolt into said closed position until said bolt is moved toward said open position away from said hook.