Specna Arms SA-C05 CORE Gen.2 HAL ETU M4 AEG – Black

The Specna Arms SA-C05 CORE Gen.2 HAL ETU M4 AEG combines proven platform reliability with modern convenience. Built around a solid V2 gearbox and standard motor, this rifle handles competitive play, site skirmishes, and mil-sim operations with confidence. The integrated HAL¹ ETU (Electronic Trigger Unit) unlocks programmable fire modes, giving you semi-auto precision or full-auto suppression on demand.

Key Features

• HAL¹ ETU with programmable firing modes – configure semi-auto, full-auto, burst, or safety to suit your playstyle
• CNC aluminium handguard and alloy outer barrel – lightweight yet rigid for rail-mounted optics and accessories
• Multi-position M4 crane stock – adjust length of pull for body armour, plate carriers, or open play
• Rotary hop-up unit – precision hop adjustment for consistent grouping at range
• V2 gearbox with standard motor – proven durability and reliable trigger response
• 300-round high-capacity magazine included – fewer reloads between engagements

Real-World Use Cases

This is an outstanding choice for mid-to-advanced players. Skirmishers benefit from the 310 fps output and programmable trigger, which lets you dial in semi-auto for accuracy drills or switch to full-auto for room entries. Mil-sim operators appreciate the M4/AR-15 platform familiarity and adjustable stock for wearing plate carriers or load-bearing kit. Its modest 2.1 kg weight and 645 mm length make it nimble in CQB sites while remaining capable at medium range thanks to the solid inner barrel and hop-up setup.

Technical Specifications

• Muzzle Velocity: 310 fps (0.20 g BBs)
• Gearbox: V2 (motor pinion-compatible, standard upgrade path)
• Motor: Standard (long-type)
• Hop-Up: Rotary (adjustment dial, stable performance)
• Fire Modes: Safe, semi-auto, full-auto, programmable via HAL¹ ETU
• Magazine Capacity: 300 rounds (high-capacity, included)
• Battery: 7.4V LiPo with Deans connector
• Overall Length: 645 mm (compact M4 carbine profile)
• Weight: 2.1 kg (ready-to-play)
• Rail System: 20 mm RIS/RAS receiver and handguard – accepts standard AR-pattern optics and accessories
• Construction: CNC aluminium handguard, alloy suppressor and outer barrel, high-density polymer receiver and stock, steel dust cover
• Colour: Black

Compatibility & Upgrades

The V2 gearbox is one of the most supported platforms in airsoft. You can upgrade the motor to a high-torque or high-speed variant, swap in a higher-ratio gearset for increased rate of fire, or tune the spring for fps tweaks – all without major disassembly. The 20 mm RIS/RAS receiver and handguard accept any standard Picatinny rail-mount optic, laser, or vertical foregrip. M4-pattern stocks, buffers, and grip panels are widely available. Magazine compatibility with standard AEG and high-capacity mags (like the included 300-rounder) gives you flexibility on the field.

UK Legal & Site Notes

At 310 fps, this rifle falls within the typical site limit for assault rifles (usually 500 fps max at 2 joules). Always chrono before play and confirm your site’s rules on fire modes – some venues restrict full-auto indoors. The integrated ETU allows you to lock out full-auto if needed. Two-tone finish is not applied; the black finish meets current UK airsoft guidelines for over-18 ownership and play at insured sites.

The Specna Arms SA-C05 CORE Gen.2 is in stock now. Grab yours and enjoy a reliable, feature-packed platform that grows with your skills and preferences.