Compared to the M4 , the M4A1 has full auto capability, a consistent trigger pull, and a slightly heavier barrel. The heavier barrel is more durable and has greater capacity to maintain accuracy ...

Here’s one of my favorites. It’s the M4 Shorty in Gray Zone Warfare—a short-barrel rifle that saw me through the early-game quests for cheap. How to Build the M4 Shorty in Gray Zone Warfare ...

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 ...