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M5 Buffer tube screw 1x #23 HSS Drill Bit Grip screw pilot holes 1x Compression Spring Pusher piece — keeps engine seated forward 2x Bullet Valve Lead
F1 or JACK systems
What sets this system apart from other mechanical systems is the design of its trigger
Standard V2 Kythera SA trigger link
JACK / F2 BV309A Bullet Valve Beanie M5 Buffer tube screw 1xThe BV309A Bullet Valve is the solenoid used in all current production F2 and JACK HPA systems and it is backwards compatible with all F2 and JACK systems previously made. Power lead is included with the valve and also available separately. (Power Lead part # 10000479)
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