This is a Apex Tactical Specialties , model APX116-110.
The Apex Optimized Grip for the CZ Scorpion EVO 3 S1 fits both the pistol and carbine and optimized grip angle improves overall ergonomics when compared to the factory grip. It is designed so the trigger assembly can be removed without removing the grip. It requires a 3mm Allen wrench for installation. (Not included).
Features:
Fits the CZ Scorpion EVO 3 S1 pistols and carbines
Improves ergonomics
Designed so trigger assembly can be removed w/o removing the grip