CO2 Inserts Model:CGS 33g Velocity: 550fps w/

Velocity: 550fps w/

A&K/JG SR-25 (V2

ROF: 30rps The maximum cyclic rate of the JACK™ is affected by several factors such as the operating pressure as well as quality of the magazine and BB's used

Black: Nozzle (not used for JACK/F1)

CO2 Inserts Model:CGS 33g Velocity: 550fps w/Our CO2 inserts are manufactured for both the UGS and CGS stocks and have models for both the 12g and 33g disposable CO2 cartridges in either variant. However, the inserts have more uses than just being paired with one of these stocks. Since they are equipped with the same standard ASA threads that are on a HPA tank, they can also be threaded into a conventional regulator to make an extremely compact air rig. The only difference between the UGS and