Counter Strike Online Wiki

For original version, see PJ MK3A1.

Room restrict shotgun.png Flame Jackhammer is a Unique grade automatic shotgun in Counter-Strike Online.


Empty slot.png This weapon has Part System installed.

Flame Jackhammer holds 15 rounds of 12 Gauge Incendiary. Its damage was improved by increasing the number of magazines and replacing the ammunition type, complementing the existing weakness of the gun. It gives burn effect to the victim, giving damage over time for several seconds.


  • Moderate damage
  • High rate of fire
  • Light weight
  • Short reload time
  • Large magazine size
  • Can be enhanced
  • Can be attached with Parts


  • Cannot be fired while reloading
  • Expensive price
  • Obtainable at low chance from decoder

Release dates

  • South Korea & China: 22 September 2016.
  • Taiwan/Hong Kong: 27 September 2016.
  • Japan: 12 October 2016.
  • Indonesia: 22 February 2017.
  • CSN:Z: 2 October 2019.

Weapon Enhancement

This weapon can undergo Weapon Enhancement to enhance its damage and magazine size.

Comparison to PJ MK3A1


  • Higher damage in all modes (Human +24, Zombie: +50, Scenario: +256)
  • Lighter
  • Larger magazine size (+5)
  • Has Part System
  • More expensive (+$500)


Shoot sound

CSO_MK3A1_Flame_(JACKHAMMER)_Review CSO_카스온라인_초강력_신규총_플레임_잭_해머_리뷰_(Flame_Jack_Hammer)_료핸


  • This weapon was first released in Bingo and later sold directly in Shop for a short period of time. It is currently obtainable from the Unique Decoder.
  • The incendiary rounds are likely based off of the Dragon's breath, although it doesn't burn while traveling through the air and only burns flesh.