Zius BK1S/BK2S

Inspired by the MP5K, this kit changes your BK1S/BK2S into an ultra compact CQB blaster using this kit. Battery is stored on the compartment above the receiver. Able to take buffer tube size battery.Battery compartment area: 195mm x 24mm x 21mmAvailable in black, yellow and silver. Please contact us..

Replacement BK1S and BK2S gearbox switch set with wiring..

Stock BK1S barrel, for those who want to upgrade from the shorter ones...

Replacement BK1S and BK2S dart gate with breech return spring...

Replacement BK1S and BK2S T238 MOSFET..

Replacement BK1S and BK2S 480 motor..

Replacement BK1S and BK2S plunger rod and plunger tube assembly..

Replacement BK1S and BK2S complete gearbox set with motor cage. Includes trigger and trigger spring..

BK1S buffer tube and buttstock for those who wish to swap their BK2S PDW buttstock to a standard stock that takes standard AEG buttstock.Available in Yellow and Grey..