Modular handgun

A universal trigger frame for a modular handgun system, said universal trigger frame adapted to be used with a plurality of grip frames and with a plurality of slide and barrel assemblies, wherein each of the plurality of grip frames has a different hand grip length and/or a different hand grip circumference and each of the slide and barrel assemblies has a different slide and barrel length, said universal trigger frame comprising:

• an elongated frame having a barrel locking block, a pair of slide rails, and an accessory rail, said frame adapted to have a trigger assembly mounted thereto,
• a first rearward extension adapted to be received in a first recess of the grip frame,
• a second rearward extension, spaced below said first rearward extension, and adapted to be received in a second recess in the grip frame,
• a ramp surface adapted to cooperate with a ramp surface on the grip frame for camming said frame rearwardly relative to the grip frame after said first rearward extension has been inserted into the first recess and as said frame is pivoted downwardly into the channel of the grip frame,
• an outwardly extending lug on each lateral side of said frame, each said lug being adapted to be received in a respective notch in each lateral side of the channel of the grip frame, and
• an opening adapted to be aligned with an opening in the grip frame for removably receiving a pin.

A method of assembling a handgun comprising the steps of:

• providing a grip frame having an elongated channel and a hand grip extending downwardly from the elongated channel,
• providing an elongated trigger frame having a barrel locking block, a pair of slide rails, and an accessory rail,
• providing a trigger assembly comprising a trigger and a trigger mechanism housing,
• positioning the trigger and the trigger mechanism housing in the trigger frame,
• pinning the trigger to the trigger frame with a trigger pin,
• pinning the trigger mechanism housing to the trigger frame with a trigger mechanism housing pin,
• positioning the trigger frame in the grip frame channel, and
• pinning the trigger frame to the grip frame with a trigger frame pin.

A universal trigger module for a handgun comprising:

• an elongated unitary trigger frame having a barrel locking block, a pair of slide rails, and an accessory rail, said barrel locking block, pair of slide rails, and accessory rail all formed integrally with said trigger frame,
• a trigger and a trigger mechanism housing removably secured to said trigger frame,
• a slide release lever removably secured to said trigger frame, and
• a slide takedown lever removably secured to said trigger frame.