They have a translucent body allowing you to see how many BB’s remaining

M-Lok slots are present in more locations in this 2

18" is standard length for V2 kits in F2

an inner and outer barrel

Valken Thunder V2 CO2 Sound Simulation Grenade Shells Style:Standard They have a translucent bodyThe Valken Thunder V2 Co2 Sound Simulation Grenade Shells are the next generation of Valken Thunder V sound grenades. This airsoft simulation grenade shell and emits noise only when used in conjunction with the Valken Thunder V2 Core (sold separately). Designed to mimic the loud bang of a tactical flash bang grenade, these replacement shells are compatible with 12gram Co2 cartridges that, when the cores pin is pulled, fill the shell with Co2 and then