Firearm housing with heavy-duty locking mechanism

A housing for securing a firearm, comprising:

• a) a door assembly including a door and at least one lever arm, wherein the door pivots about a pivot axis and between a closed position preventing the firearm from being withdrawn from the housing and an open position permitting the firearm to be withdrawn from the housing;
• b) a fixed frame assembly including at least one support element for supporting the firearm in the housing;
• c) a slide assembly that slides relative to the frame assembly between a closed position and an open position, wherein the slide assembly includes at least one slide-locking member, wherein the door is pivotally coupled to the slide assembly at the pivot axis;
• d) at least one set of first and second cooperating stop surfaces with the second stop surface defined by the lever arm of the door assembly and with the first stop surface defined by the frame assembly, wherein the stop surfaces engage to lock the door in the closed position when the slide assembly is locked in the closed position and disengage to release the door from the closed position when the slide assembly is moved to the open position;
• e) at least one set of first and second cooperating drive surfaces that engage to move the door to the open position in response to the slide assembly moving to the open position, wherein the second drive surface is defined by the lever arm of the door assembly and the first drive surface is defined by the fixed frame assembly, wherein as the slide assembly moves from the closed position toward the open position the second drive surface is moved into contact with the first drive surface at a location offset from the pivot axis, and wherein as the slide assembly moves farther toward the open position and the first drive surface remains fixed then the resulting lever force of the first drive surface on the second drive surface pivots the door to the open position;
• f) at least one retainer that moves between a locked position engaging the slide-locking member to lock the slide assembly in the closed position and an unlocked position disengaged from the slide-locking member to release the slide assembly from the closed position;
• g) an access authentication device adapted to move the retainer from the locked position to the unlocked position upon authenticating an authorized user of the firearm;
• and
• h) a spring element that moves the slide assembly towards the open position upon release of the slide assembly from the locked closed position.