spring 70 push it out the pin moves back into its first rest position 150 via the two remaining straight sections during this return stroke the cam shaped cut on retention lever 62 is moved by the follower area 112 of the lock lever resulting in the retraction of the stop without the stop in place the spring 70 can push the cartridge out of the magazine by about five eighths of an inch toward the end of the return stroke the front end 67 of the slot 63 in the plate 66 pushes the tab 78 of the shutter 64 thus pulling the flag into the empty cell position it should be noted that the shutter 64 includes a notched hole 80 fig1 which restricts the flag to one of three definite positions it is important that the loader not be interacting with the magazine when it is removed from the receiver as can be seen in fig1 this condition is satisfied by providing an automated receiver opening mechanism that is actuated when the loader cartridge transfer mechanism 168 is in a docked position and out of the way of the cartridges and the magazine at the lowermost position the transfer mechanism presses forward against the first bar 170 of the release linkage 118 this causes the second bar 172 to pull on the third bar 174 rotating the fluted shaft 114 rotation of this fluted shaft causes the attached resilient pawls 116 to be pulled from their locked positions in the catches 120 a first spring 122 causes the receiver to rotate into an open position this spring may be a coil spring as shown in fig1 or it may be a leaf spring mounted under the receiver if a.