The Huntsman Tactical M4 PDW M-Lok AEG (Full Metal with Mosfet - HMT22) is an entry to intermediate level airsoft replica known for its durable full metal construction and integrated electronic trigger unit and MOSFET. 
 
Key Features and Specifications
Construction: The replica features a full metal upper and lower receiver and handguard, with a durable polymer stock and grip.
Internals: It includes a full metal gearbox with 8mm solid bushings, 18:1 ratio steel gears, a 14-tooth steel piston, and a red anodized cylinder for improved air seal.
Electronics: A built-in MOSFET and electronic trigger unit provide a crisp, reliable trigger response, which is a feature usually found on higher-value replicas.
Hop-up: The AEG is equipped with a rotary hop unit for easy adjustment.
Power & Battery: It has a quick spring change (QD) system and includes a 9.6v 1200 MaH NiMH battery and charger in some packages. 
Specification 
Detail
Fire Mode
Safe/Single/Auto
FPS
301 - 350
Magazine Capacity
300 Rounds Hi-Cap
Flash Hider
Metal with 14mm CCW Screw Pitch
Sights
Fixed front sight, adjustable/detachable nylon fiber rear sight