The Trigger, Three Fingered Mainspring, Safety, Hammer, Hammer Strut and Hammer Spring, all are taken from the 1911 design.
Hammer Spring Enclosure is very similar in concept to the 1911.
The Chamber Locking Block is an element taken from later Cz Designs such as the P07, P09, Phantom, and Cz97B.
The Barrel Underlug however, looks to be derived from the Browning Hi-Power.