The CZ 750 M1 S1 is the standard tactical rifle in the CZ 750 lineup. It features a heavy barrel and a bipod is fitted as standard. While accuracy is good, other elements such as the adjustable stock and trigger mechanism are prone to wear.
The CZ 750 M1 S2 is a silenced version of the CZ 750 M1 S1 tactical rifle. It features a shorter frame and barrel. Unlike most short and silenced sniper rifles it can be fired without the silencer attached to the barrel. The S2 model is very light and compact for a rifle with integrated silencer. While the silencer is smaller it is more audible than the long silencer of the CZ 700S.