A&K Metal STW System M4A1 (Black) (AK-STW-M4A1)

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. The A&K PTW features crisp trigger pull, reinforced internal from the stock A&K, internal mosfet system, adjustable hop up, USA warranty, 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 cut off when rounds run out
Crisp trigger pull
Realistic, heavyweight build quality
Internal MOSFET system
Full metal receiver, stock tube, and barrel assembly
Fully adjustable hop up
Quick swap Cylinder design

Length: 805mm - 905mm, Adjustable
Weight: 3540g
Inner Barrel: 360mm
Magazine Capacity: 120rds. Works with Systema, Celcius, Matrix and other compatible PTW / CTW M4 Series Airsoft AEG Magazines
Muzzle Velocity: 300~350 FPS (Measured with 0.20g BBs)
Thread Direction: 14mm Negative
Gearbox: PTW Style
Motor: PTW
Fire Modes: Semi/Full-Auto, Safety
Battery: 9.6v Small Butterfly Type / 7.4v LiPo recommended (Battery not included. Wired to the stock with a Large Tamiya connector)
Hopup: Yes, Adjustable
Package Includes: Gun, Magazine, Manual