Specna Arms SA-FH07 FLEX™ Gen.2 M4 AEG – Black

The Specna Arms SA-FH07 FLEX™ Gen.2 is a feature-rich M4 platform AEG engineered for reliability and customisation. Built around Specna Arms’ proven V2 gearbox and ETU™ programmable electronic trigger unit, this rifle bridges performance and affordability, making it ideal for skirmishers stepping up from entry-level platforms or experienced players seeking a dependable secondary.

Key Features

• ETU™ programmable gearbox – adjust fire rate, burst length, and trigger response without opening the gearbox
• Rotary hop-up system – precise, stable spin adjustment for consistent accuracy across engagement distances
• High-capacity 380-round magazine – minimal reload breaks during skirmish play
• 20mm RIS/RAS rail system – front and top rail ready for scopes, reflex sights, and tactical accessories
• Sliding multi-position stock – adjust length of pull for comfort in body armour or lightweight kit
• Hybrid construction – alloy barrel and trim, steel buffer tube and sling mounts, polymer receiver for weight and durability balance
• Included 7.4V Deans battery – ready to deploy from the box

Real-World Use Cases

The SA-FH07 FLEX™ excels in woodland skirmish, urban CQB, and milsim events. Its 310fps (.20g) output sits comfortably within most UK site limits, whilst the rotary hop-up handles long-range engagements with minimal adjustment drift. The programmable ETU™ lets you dial in burst fire for MILSIM WEST-style play or sustained semi-auto for precision target work. Field-strippable design supports mid-game maintenance and hop-up tweaks – no gunsmith needed.

Technical Specifications

• Muzzle velocity: 310fps (with .20g BB)
• Gearbox: V2 with ETU™ electronics
• Motor: Standard torque
• Hop-up: Rotary, user-adjustable
• Magazine capacity: 380 rounds (high-capacity wheel-wound)
• Magazine compatibility: AEG, high-capacity, and wheel-wound mags
• Battery: 7.4V Deans connector (included)
• Overall length: 810mm (stock fully extended)
• Weight: 2.85kg (with battery and magazine)
• Rail system: 20mm RIS/RAS (Picatinny top and handguard)
• Firing modes: Safe, semi-automatic, full-automatic, programmable
• Construction: Alloy outer barrel and trim; steel buffer tube and QD sling mounts; high-density polymer receiver, handguard, stock, and pistol grip; rubber butt plate
• Colour: Black

Compatibility & Upgrades

The SA-FH07 FLEX™ accepts standard AEG components: upgrade the motor for faster rate-of-fire, swap the hop-up rubber for enhanced range, or install a reinforced piston for heavy-use skirmish schedules. The 20mm rail interface supports any Picatinny-mount optic or laser unit. Deans batteries are widely stocked across UK retailers, and the ETU™ is field-programmable – no external mosfet needed.

UK Legal & Site Notes

This AEG is UK legal under the Airsoft Tempering Act (fitted with an ETU™-controlled mosfet and lower than 2.5 joules). Most UK skirmish and milsim sites accept 310fps rifles without issue; always check site chronograph limits before attending. The rifle is supplied in a compliant carrying case and includes magazine and battery. Two-tone colour variants may be held in stock – enquire for availability.

Upgrade your mid-range arsenal with the Specna Arms SA-FH07 FLEX™ Gen.2. Order now from Airsoftdirect UK and receive your rifle with full magazine and battery ready to skirmish.