How to Build the SBR M4 in Gray Zone Warfare To build the Short-Barrel Rifle M4 in Gray Zone Warfare, you must first unlock Gunny level 2, which will unlock additional weapon attachments.

This rifle is much, much cooler, though! Related: How to Build an M4 Shorty in Gray Zone Warfare Besides the iconic factor of using this weapon, the recreated CAR-15, built around an M4 in Gray ...

While insurgent forces and militias favor the AK-47, professional armies lean toward the M4’s technological edge. With Ukraine adopting NATO-standard weapons, its shift to the M4 signifies a deeper ...