the hammer 130 until the pawl 132 is moved away from the locking bar plate 134 and returns to its position underneath the locking bar plate 134 the cylinder 120 provides a slim profile to aid in concealment as can be seen in fig6 and 7 the cylinder is uniquely shaped there are limited lines of symmetry with the design of the cylinder and the outside surface of the cylinder proximate each chamber is not consistant relative to the axis of rotation of the cylinder for purposes of this application i term this relation to be u201c non radially symmetric u201d as any symmetry in the cylinder is not necessarily tied to all of the radii of the cylinder though some lines of symmetry may coincide with certain diameters this design is intentional and ideally presents two opposing flat sides so that when stowed the flat sides are presented outward it is of course possible for three fig1 or even four sides to be flattened the flattened profile crates four corners in which the four chambers 122 should ideally reside accordingly the cylinder position lock grooves 126 should also ideally be located in each corner arrangement of the cylinder however is determined by choice of the designer and the chambers 122 and cylinder position lock grooves.