Pheas Airsoft unboxes the Specna Arms SA-FX01 FLEX AR-9, a lightweight airsoft rifle that includes the HAL Electronic Trigger Unit (ETU). The rifle’s noticeable feature is its extreme lightness, weighing under two kilograms due to its primarily polymer construction, making it highly comfortable and non-fatiguing for all-day play.

Internally, the platform is based on the airsoft M4, ensuring excellent parts compatibility. Its performance is significantly enhanced by the programmable HAL ETU MOSFET, which delivers a high rate of fire—over 20 rounds per second on an 11.1v battery—along with a responsive flat trigger and a consistent roll-down hop unit.

Despite its budget price, the SA-FX01 FLEX is noted for its good build quality and ergonomics. He says that the combination of its advanced internal features and strong performance makes it a superb, high-value airsoft package that punches well above its class.