FRAC OCP Scorpion Crye Precision G4 Combat ShirtFlame Resistant Operational Camouflage Pattern Scorpion Crye Precision G4 Combat Shirt Designed for wear underneath body armor, the G4 Combat Shirt is ready to serve those who need a light efficient shirt, as the G4 offers a flame resistant torso, a slim cut with maximum mobility, and low profile zippered shoulder pockets designed to reduce bulkiness while still leaving room for essential gear. In short, the G4 Combat Shirt is a dream come true for