The 
WE-Tech TA-2015 GBB P90
 is a highly detailed gas blowback airsoft submachine gun known for its realistic bullpup design, ambidextrous controls, and hard-kicking recoil system. 
Muzzle Velocity: Approximately 300–390 FPS (gas and region-dependent).
Magazine Capacity: 50 rounds (RealCap) with a large gas reservoir.
Weight: Approximately 2.4 kg to 2.5 kg.
Construction: Fibre-reinforced polymer body with aluminium alloy internals and rails.
Firing Modes: Safe, Semi-Auto, and Full-Auto (featuring a two-stage trigger).
Hop-Up: Easily adjustable rotary style.
Thread: 14mm right-hand (CCW) for suppressors or flash hiders. 
Bespoke Airsoft +7
Key Features and Performance
Realistic Operation: Features a Bolt No Hold (BNH) system where the gun stops firing when the magazine is empty. It includes a dry-fire switch on the magazine for training.
Ambidextrous Design: True to the real firearm, the charging handle, magazine release, and fire selector are accessible from both sides.
Internal Gas System: Unlike some other GBBs, it has an internal gas reservoir in the stock that feeds from the magazine, which some users on Reddit have noted provides consistent performance.
Field Stripping: Can be disassembled without tools, similar to the real P90, by pressing a single button above the thumb hole.