When using Blank TPAKs, the UNIT4 cycles the bolt carrier group with every trigger pull, resetting the trigger group and delivering a realistic recoil impulse. In a room temperature environment, each CO2 cylinder delivers approximately 45 to 50 cycles of CO2.
(1) Pre-Filled Re-Usable Blank TPAK with 50 charges
(9) Additional CO2 cylinders
(2) Pre-Filled Re-Usable Blank TPAKs with 50 Charges each