Counter Strike Online Wiki

Brick Piece S1451 or Brick Piece BM-21 Grad is a Unique Brick Piece submachine gun in Counter-Strike Online.


Empty slot This weapon has Part System installed.

This is the modified version of Dual Uzi with 80 rounds of plastic bullets. It can be recombined to be a mini rocket launcher for a splash attack. It fires 3 grenades at a time and can do massive damage per hit.


  • Massive damage for an SMG
  • High accuracy
  • Stable recoil
  • Superb rate of fire
  • Does not affect moving speed
  • Large magazine size for an SMG
  • B mode can perform headshot for zombie (even without Deadly Shot)
  • Can be obtained from Part Weapon Selection Box
  • Can be enhanced


  • Expensive
  • Available at limited time in Top 50 Decoder
  • Long reload time

Release date[]

  • South Korea: 2 March 2017.
  • Taiwan/Hong Kong: 7 March 2017.
  • China & Japan: 8 March 2017.
  • Indonesia: 12 July 2017.
  • CSN:Z: 6 September 2017.

Comparison to Dual Uzi[]


  • Higher damage to zombies (+3) and scenario (+6)
  • Can be recombined to fire a rocket launcher
  • Very high splash damage in rocket mode
  • Has Part System
  • Same recoil (9%)
  • Same rate of fire (92%)
  • Same weight (0% speed reduction)
  • Same ammo size (80)
  • Lower damage to humans (-1)
  • More expensive (+$500)
  • Lower accuracy (-2%)
  • Longer reload time (+0.5 seconds)


Shoot sound


  • The B mode is based on BM-21, a Soviet truck-mounted 122 mm multiple rocket launcher.
  • The damage in normal modes have been reduced from 16 to 14 since Team Deathmatch Revive Update (14% reduction).

External links[]