My most recent obsession in Gray Zone Warfare is this close-quarters SBR M4A1. It’s compact, ideal for close-range gunfights, and packs a punch with M855 ammunition in each magazine. Here’s ...

The M4/M4A1 5.56mm Carbine is a lightweight, gas operated, air cooled, magazine fed, selective rate, shoulder fired weapon with a collapsible stock. It is now the standard issue firearm for most ...