Llewellyn,
It comes with 2-17 round magazines and they are compatible with the CZ75.

it comes with 2 17 round mags see ******TriStar's P-120 features a steel frame and slide with a chrome finish. The frame has a Picatinny rail and black polymer checkered grips. Its slide has a rear dovetail sight and a fixed blade front sight. This 9mm model comes packaged in a hard plastic case with ********two Mec Gar magazines, cleaning kit, and a gun lock.
Type
Pistol
Grips
Black Polymer
Action
Single/Double
Safety
Manual
Series
Steel
Weight
30 oz
Caliber
9mm luger
Capacity
17+1
Case Type
Hard
Barrel Type
Steel
Sight Style
Contrast
Weight Range
16.00 oz to 31.99 oz
Barrel Length
4.7"
Frame Material
Steel
Slide Description
Chromed
Barrel Length Range
4.00" to 4.99"
Sight Configuration
Fixed Front, Dovetail Rear

Liewellyn, this UPC code 9mm model comes packaged in a hard plastic case with two Mec Gar 17rd magazines.