20mm STRATOS CNC steel bolt for Tokyo Marui AKM GBBR
Patented telescopic dual stage blow back system
20mm cylinder bore x 55mm nozzle travel (original 19mm x 44mm)
Full bolt carrier travel
steel CNC made bolt and cylinder
steel cast made recoil spring holder
high ROF buffer spring standard
steel outer shell optional
PA12 nozzle
2nd batch performs better than below video
Additional information
Outer shell | Included, Not included |
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