Semiautomatic hand gun having an elongated take down pin

In a hand gun having a frame and a slide assembly movable on said frame, the slide assembly including the barrel of the gun and a camming lug, the frame having a pair of side walls which define a space therebetween, the slide assembly camming lug extending into the space between the frame side walls, an improved means for assembling the slide assembly to the frame and disassembling the slide assembly from the frame comprising:

• a pair of aligned apertures in the frame side walls;
• an aperture in the slide assembly camming lug, said slide assembly being movable on said frame to align said camming lug aperture with said frame apertures;
• an elongated take down pin, said take down pin having a body portion with an axis and a head at one end of said body portion, said take down pin having a cross-sectional shape and area commensurate with said aligned frame apertures, said take down pin further being provided with notches in a first side thereof adjacent the opposite ends thereof, said take down pin being of constant cross-sectional area in the region between said notches, said take down pin being inserted in said aligned frame and slide assembly camming lug apertures to attach the slide assembly to the frame;
• elongated lever means mounted on a first side wall of the frame for movement in a direction generally transverse to the said take down pin axis, said lever means being engagable with said take down pin notches whereby said lever means may engage a first take down pin notch to retain the pin in position and the slide assembly mounted on the frame and may engage the other of said take down pin notches to prevent unintended separation of said take down pin from the frame when the slide assembly is removed;
• and
• means resiliently biasing said lever means toward said take down pin.