Counter Strike Online Wiki

For its Terrorist counterpart, see AK-74U.

The M16A1 is the first generation of the M16 rifles in Counter-Strike Online.


This is the main U.S. military rifle that holds 31 5.56 NATO rounds (including 1 preloaded bullet). You can select auto/semi-auto mode. Its accuracy and damage will increase slightly in semi-auto mode. It became the main U.S. rifle during the Vietnam War.


  • Able to switch between semi-auto and full auto
  • Good accuracy, especially semi-automatic mode
  • Cheap ($2900)
  • High rate of fire
  • Holds 1 extra ammo when compared to most assault rifles
  • Purchasable by game points
  • High damage for an assault rifle
  • Decent recoil
  • Higher damage when fired in semi-automatic


  • Purchasable only by the Counter-Terrorists
  • Heavy for an assault rifle
  • Low stun to zombies

Tips and tricks[]

  • Switch to automatic mode for close range combat.
  • Switch to semi-automatic mode for long range combat.
  • This weapon does higher damage than the M4A1 but not as high as the AK-47.
  • This weapon outpowers the StG 44 in almost all aspects.
  • In Zombie Escape, M16A1 can deal a decent knockback power in A mode.



Release date[]

  • South Korea: 11 October 2012.
  • Taiwan/Hong Kong & China: 24 October 2012.
  • Singapore/Malaysia: 12 February 2014.
  • Indonesia: 3 June 2014.
  • CSN:Z: 23 September 2014 (Craft).
  • Vietnam: 26 March 2015 (Craft).



  • Higher damage (+3)
  • Higher accuracy (+5%)
  • Lighter (-3%)
  • Higher magazine size (+1)
  • Can switch between semi-auto and full auto firing mode
  • Same ammunition type (5.56 NATO)
  • Used by Counter-Terrorists only
  • Purchasable by points
  • More expensive (+$100)
  • Higher recoil (+5%)

M4a1 icon

  • Higher damage (+1)
  • Higher magazine size (+1)
  • Can switch between semi-auto and full auto firing mode
  • Cheaper (-$200)
  • Same rate of fire in automatic mode (91%)
  • Same knockback power
  • Can only be purchased by Counter-Terrorists
  • Same ammunition type (5.56 NATO)
  • Higher recoil (+6% in automatic and +2% in semi automatic)
  • Heavier (+2%)
  • Lower rate of fire in semi automatic mode (-9%)
  • Cannot attach silencer


Firing Sound


Reload sound

Draw Sound

Switching firing mode


  • M16A1 reuses most of M4A1's assets, mostly with its animations.
  • It is the only weapon described to have a round already in the chamber. However, said round will still be present even after reloading an empty gun.
  • Both fire modes has different muzzle flashes and firing sounds.
  • This is the first weapon to emit clicking sounds whenever the user switches firing modes. The second is HK G11.
  • Before the Free Update patch, this weapon used to have level restriction. The players must achieve level 15 (11 for Taiwan/Hong Kong) or higher to purchase it.