Abstract: A door assembly for selectively interlocking opposing doors each pivotably mounted at a hinge side thereof to a door frame so as to both open and close in the same direction includes a door handle assembly mounted to one door at a latch side thereof opposite the hinge side and carrying a first plurality of magnets, and another door handle assembly mounted to the other door at a latch side thereof opposite the hinge side and carrying a second plurality of magnets. The door handle assemblies are arranged relative to each other with the first and second pluralities of magnets aligned such each aligned pair of the first and second pluralities of magnets have opposite magnetic polarities, and the aligned first and second pluralities of magnets magnetically couple to each other as the door handle assemblies are brought into contact with each other.

Abstract: An apparatus for the cleaning of firearms comprise a rack dimensioned to support a plurality of disassembled firearm elements within a tank. A cleaning fluid surrounds the firearm elements for the removal of ignition residue and other unwanted particles from the surfaces of the elements and placing the removed particles in suspension within the fluid. The fluid is agitated, such as by an ultrasonic source mounted to the tank, to enhance the contact between said cleaning fluid and said firearm elements. A pump provides for the flow of fluid within said tank, from the tank to an external filter, and from the filter back to the tank. The filter is adapted to remove the suspended particles from said solution and onto a replaceable filter media. The fluid can be heated to further improve cleaning performance.