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.

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 ...

Endlessly customizable, the US-made M4 is a highly capable AR, suitable for short, medium ... To that end, we've opted for the QWC Marksman barrel and 3X Tactical Scope - the two most important ...