Counter Strike Online Wiki

For the original version, see M249.

SKULL-7 or M249EX is a machine gun built by the Government in Counter-Strike Online based on the M249.


SKULL-7 holds 120 rounds each round with special 5.56mm Anti-zombie. To improve its accuracy in mid-long range, it is designed based on a structure that can reduce recoil while firing. The chambered bullets deal critical damage to zombies due to its high penetration rate and firepower.


  • High damage to both humans and zombies
  • Large magazine capacity
  • High reserved ammunition
  • Equipped with a usable scope
  • Better accuracy when zoomed
  • Short reload time
  • Can be enhanced
  • High stun to zombies


  • Expensive in match
  • Heavy weight
  • Expensive ammunition
  • Low rate of fire
  • Low knockback power

Release date[]

  • Taiwan/Hong Kong: 13 July 2010
  • South Korea & China: 14 July 2010
  • Japan: 22 July 2010.
  • Singapore/Malaysia: 8 September 2011.
  • Indonesia: 21 December 2011.
  • Turkey: 24 October 2013.
  • CSN:Z: 23 September 2014.
  • Vietnam: 26 March 2015.
  • South Korea: 4 December 2014


Range 0m
Armor Yes No
Head 96 100+
Chest 24 32
Gut 24 32
Leg 24 24
Part (Zombie) Damage (+ Kevlar) 120 shots (1 mag)
Head & Chest 89 10860
Gut 22 2640
Leg 22 2640


  • Wait for the zombies to get nearby to fire accurately. Otherwise, use the scope to engage medium to long range enemies.
  • Make sure everything is clear before reloading SKULL-7.
  • Try to get to near the Zombie while using SKULL-7 as it has a higher chance of performing headshot.
  • 120 rounds of SKULL-7 can inflict 3720 damage to a zombie, and around 60,000 damage to bosses.


  • Charge SKULL-7 user while he/she is reloading.
  • Avoid direct combat with the user.


SKULL-7 World Championship


This is a special edition of SKULL-7 released during CSO World Championship 2014 in Seoul. It is given to the participants of the tournament. It is covered with a layer of chrome and does not possess any statistical differences.


Icon m249 cso
  • Higher damage to humans (+2)
  • Higher damage to zombies (+33)
  • Lower recoil (-1%)
  • Higher magazine size (+20)
  • Higher reserve ammunition (+20)
  • Higher accuracy (+6%)
  • Usable scope
  • Same rate of fire (90%)
  • Same weight (14% speed reduction)
  • Same reloading time (4.5s)
  • Obtainable during events only
  • More expensive (+$3250)
  • More expensive ammunition ($200 per 30 rounds)

  • Lower recoil (-1%)
  • Higher penetration power
  • Lighter (-2%)
  • Same damage to humans (31)
  • Same accuracy (84%)
  • Same rate of fire (90%)
  • Same price ($9000)
  • Same magazine size (120)
  • Usable scope
  • Same ammo cost ($200 for 30 rounds)
  • No explosive ammunition
  • Longer reloading time (+0.5s)

JANUS7 icon
  • Higher Damage in A mode (+2)
  • Higher accuracy in A mode (+1%)
  • Lighter (+2%)
  • Higher reserve magazine size
  • Can be scoped
  • Same rate of fire
  • Same knockback power
  • Same stun power
  • Same reloading time (4.5s)
  • No Janus Transformation System
  • Higher recoil for both A (+2%) and B (+20%) mode
  • Lower magazine size (-80)


Firing sound (South Korea, Taiwan/Hong Kong and Japan - Old)

Ditto (Currently all regions)

Reloading sound


  • The optical sight mounted on the SKULL-7 is the ELCAN M145 MGO.
  • This is the first Anti-Zombie weapons released.
  • This is the first weapon in game which is chambered with 5.56mm Anti-zombie rounds.
  • This is the first machine gun in-game with zoom function
  • There is a skull engraving on the side of the ammunition box.
  • The words "KS-501" can be clearly seen printed on the receiver.
  • China, Singapore/Malaysia, Indonesia, Thailand and Turkey regions used to have a different shooting sound for the SKULL-7 similar to the M249, but a little deeper in the end due to lower rate of fire.
  • The chrome texture of the SKULL-7 CSOWC version does not apply in D3D graphics setting, this also happens to the SKULL-5 CSOWC version.
  • SKULL-7's texture is realigned in Blood Paint update. The reload animation is also changed a bit and the the reload time is now 4.5 seconds, instead of 4.0 seconds before.