Patent ID: 7937876

Claim:
A pin for use in engaging an upper receiver of a firearm to a lower receiver of the firearm and for disengaging the upper receiver from the lower receiver, comprising: an elongated body having a proximal end opposite to a distal end, wherein when the pin is positioned on the firearm, the body extends between the upper receiver and the lower receiver; a positioning member disposed on the proximal end of the body, wherein when the pin is positioned on the firearm, the positioning member extends outwardly from a first side of a main frame of the lower receiver, wherein the positioning member comprises a knob comprising an underside, a base portion, and a middle portion disposed between the underside and the base portion, and further wherein the base portion is disposed on the proximal end of the body, and the middle portion is recessed between the underside and the base portion; and a push member disposed on the distal end of the body, wherein the push member facilitates removal of the pin from the upper receiver by hand without the need for any tools, wherein when the pin is positioned on the firearm, the push member extends outwardly from a second side of the main frame of the lower receiver, wherein the first side of the main frame is opposite to the second side of the main frame.