The G&G CM16 SRS BATTLESHIP GREY is a high-performance, lightweight airsoft rifle known for its durable polymer body, integrated MOSFET, and Electronic Trigger Unit (ETU).
 
Specifications
According to the manufacturer G&G Armament and various retailers, the G&G CM16 SRS has the following specifications: 
Overall Length: 750 mm (adjustable).
Weight: 2255 g.
Inner Barrel Length: 205 mm.
Inner Barrel Bore: 6.08 mm.
Main Materials: Glass fibre reinforced polymer body with a CNC aluminum KeyMod handguard.
Fire Modes: Safe, Semi-Automatic, and Full-Automatic, with the full-auto mode programmable to a 3-round burst via the ETU.
Muzzle Velocity: Approximately 330–350 fps with 0.20g BBs.
Magazine Capacity: 300 Rounds Hi-Cap magazine included.
Motor: Long-type standard/high-torque (~18,000 rpm).
Battery: Requires a 9.6v NiMH or 11.1v LiPo nunchuck battery (not included). 
Key Features and User Opinion
Integrated Electronics: The pre-installed MOSFET and Electronic Trigger Unit (ETU) provide a crisp, fast trigger response and protect the trigger contacts.
Build Quality: Reviewers praise the combination of a rugged, lightweight polymer receiver and metal handguard.
Customization: The 7-inch KeyMod rail system and full-length top rail allow for extensive accessory attachment, such as optics, grips, and lights.
User-Friendly Design: It features ambidextrous magazine release and charging handle, along with a non-slip textured selector switch, making it friendly for left-handed users.
Performance: One user review on Evike.com noted "amazing internals" and great RPM on semi and auto with an 11.1v LiPo battery.
Potential Issues: Some users have reported issues with the stock MOSFET/ETU failing after high round counts, suggesting an upgrade might be necessary for heavy use