A&K Systema Clone M3 Spider STW Airsoft Professional Training Weapon The A&K STW is a solid Airsoft AEG utilizing the Systema PTW engine design for features such as stop firing when magazine is empty and quick swap of various FPS cylinders to be possible. This special edition features crisp trigger pull, reinforced internal from the stock A&K, internal mosfet system, adjustable hopup, 400+ FPS cylinder and more of what you will normally only find on a Systema PTW. Features:
Solid internal design, based on the Systema PTW
120rd magazine with automatic cutoff when rounds run out
Crisp trigger pull
Realistic, heavyweight build quality
Internal MOSFET system
Full metal receiver, stock tube, and barrel assembly