Hi-Point semi-automatic pistols are polymer framed handguns based on the blowback design.
Different from other blowback design pistols such as the Walther PPK, the P-64, and the Astra 600 which use a heavy slide combined with a stiff recoil spring to hold the breech closed, these pistols use a heavier slide so they can use a softer recoil spring.
As with most blowback handguns, this pistol has fewer moving parts to clean and lubricate than its locked breech counterparts.
Zamak is a zinc alloy which is often used in low cost firearms; previous manufacturers using this technique included Lorcin Engineering Company and Raven Arms.
They are very inexpensive, constructed using polymers and alloyed metals as much as possible, resulting in a reduction of production costs and sale price.