"A well rounded assault rifle, decent at most ranges."-in-game description
The M16 Assault Rifle is a common tier weapon that can be unboxed at Guns R Us or utilized by the player upon beginning a career in War Games. For a starter weapon, it's actually quite overpowered depending on how best the user uses it and what tactics they adapt and apply.
The M16 Assault Rifle was an anticipated-by-user common firearm in Guns R Us until January 31st, 2016 when it replaced the G3A3 as the first-unlockable firearm. Both the predecessor and the successor guns are available at Guns R Us.