The Scorpion EVO 3 is a 9mm carbine manufactured by Česká zbrojovka Uherský Brod, the select-fire submachine gun variant is designated A1, and the semi-automatic variant is designated S1. The EVO 3 designation denotes that the firearm is a third generation of CZ's line of small submachine guns started by the Škorpion vz. 61, which is mechanically unrelated.

The Scorpion Evo 3 is a blowback operated carbine evolved from a Slovak prototype submachine gun developed by Laugo.^[1][2] Chambered in 9×19mm Parabellum, the Scorpion EVO 3 is mostly polymer, making it a lightweight, compact submachine gun designed to be easily maneuvered in confined spaces. The A1 variant features a standard left-side non-reciprocating charging handle, although it is ambidextrous and can be switched from side-to-side. It also has an ambidextrous select fire switch, giving the operator the choice of "safe", semi-automatic, three-round burst, or fully automatic fire, while the S1's switch only features "safe" and semi-automatic fire. The standard version comes equipped with a folding, adjustable and fully removable stock for transport. The handguard is lined with multiple Picatinny rails for the addition of attachments such as grips, sights, flashlights, and lasers.^[3] The handguard on the American semi-automatic offering features M-LOK attachment points, with a single Picatinny rail on top.^[4]