SA-F03 FLEX Light Ops Stock HAL ETU V2 airsoft rifle

Specna Arms SA-F03 FLEX™ Light Ops Stock HAL ETU Gen.2 – a premium, upgrade-ready airsoft carbine built for professionals and serious players alike. This GEN.2 FLEX model combines a lightweight, compact design with cutting-edge internal systems to deliver consistent performance on the field, whether you’re running CQB engagements or late-night milsim missions across Europe. Based on the proven Specna Arms platform, the FLEX Gen.2 has been redesigned to outpace standard factory variants right out of the box.

Overview

The SA-F03 FLEX™ Light Ops Stock HAL ETU Gen.2 sets a new benchmark for value and capability in its class. From the reinforced Ather™ gearbox to the HAL ETU Gen.2 trigger system, you gain precision, reliability and programmable fire control in a single, field-ready package. Its Light Ops Stock delivers a minimalist, ergonomic shoulder fit with non-slip cheek area for repeatable aiming, while the rugged M-LOK front supports a wide range of accessories for practical field setups.

Key Features

• HAL™ ETU Gen.2 with magnetic sensor-based fire control, active brake, and adjustable trigger sensitivity (5 levels, 20–100%). Auto programmable fire modes (full auto, semi, 3-round burst, 5-round burst) plus a SEMI/BINARY/AUG/SNIPER menu and low battery alarm.
• Auto Burst Technology fires a 3-round burst before switching to full auto for controlled, predictable rapid-fire sequences.
• TDC Magnus™ Rotary Hop-Up Chamber (Top Down Center) for precise, stable adjustments and improved consistency across the field (patent protection under European patent 015052069-0001).
• Helium™ Flat Hop Eraser enhancing BB stability through the hop unit’s undercurve, reducing inconsistencies at range.
• Sealed Aluminium Nozzle and Ather™ Gearbox with reinforced frame, built to withstand aggressive play and pre-cocking while maintaining durability.
• ESA™ Quick-Change Spring System for rapid power tweaks on the fly without tools, adapting to field conditions and local games without a workshop visit.
• Light Ops Stock – minimalist, lightweight stock with rubber non-slip cheek stickers for secure shoulder contact and rapid target reacquisition.
• 6.03mm Precision Inner Barrel paired with a robust steel gears drive train and a polycarbonate piston with full steel teeth for long-term reliability.
• 8mm Slide Bearings for smooth, consistent cycling and reduced wear over time; reinforced frame with AoE inspection windows for easy maintenance.
• M-LOK Front and ergonomic grip for rapid customization with accessories and slings common to tactical setups.
• Ready for M140 Springs and compatible with a wide range of performance upgrades, giving players room to evolve their replica as skills grow.

Design, Build and Real-World Performance

The SA-F03 FLEX Gen.2 is crafted from a nylon fibre-reinforced polymer body with aluminium and ZnAl alloy components applied where strength and heat resistance matter most (barrel/flash hider and moving hardware). The result is a rugged carbine that remains light enough for all-day wear while delivering stable, repeatable accuracy on the field. The Light Ops Stock keeps profile low without sacrificing shoulder comfort, and the overall layout is optimized for fast handling in CQB, as well as controlled, deliberate shots in milsim environments.

Field-ready performance is underpinned by the combination of the TDC Magnus Rotary Hop-Up and the Helium Flat Hop Eraser, ensuring consistent trajectory even at longer ranges. The internal components—8mm slide bearings, steel gears, and a high-quality 6.03mm barrel—provide smooth cycling and reliable power transfer, while the quick-change ESA system gives players the flexibility to adapt to game formats and field rules quickly.

Specna Arms continues to build a reputation for value-forward, technically advanced replicas designed to perform right out of the box. For players seeking similar performance, explore other options in our airsoft rifles collection or learn more about Evolution Airsoft offerings in Evolution Airsoft.

To expand your kit, browse other essentials in tactical gear and consider compatible batteries and chargers from batteries and chargers to keep you field-ready longer. For ammunition and shooting accuracy upgrades, check airsoft BB selections to optimize performance with the SA-F03 FLEX™ platform.

Specifications