Why Choose M4A1 RIS CORE™ Gen2 from Specna Arms?

Specna Arms M4A1 RIS Gen2 (SA-C03 CORE™ HAL ETU™) is built around a lightweight yet durable CORE™ series nylon body reinforced with glass fiber, offering a realistic matte finish and high resistance to wear, even compared to cheaper alloy bodies. The metal outer barrel with a 14 mm CCW thread and steel components such as pins, screws, and ejection port provide strength where it matters most. The result is an extremely lightweight yet solid AEG rifle with excellent handling. Controls are based on the AR15 (M4) platform, making operation intuitive and easy to learn. It features an ambidextrous charging handle, clear fire selector, and quick hop-up adjustment via the ejection port. The RIS handguard allows mounting accessories such as a foregrip, tactical flashlight, or PEQ box. The spacious Crane stock with QD sling points provides stable support for accurate shooting. The battery is stored in the stock, allowing the use of buffer stick, nunchuk, or crane batteries. Overall, this rifle combines low weight, proven design, and upgraded Gen2 internals in one accessible platform. The CORE™ Gen2 series stands out with durable construction and upgraded internals such as the Æther™ gearbox with HAL ETU™, metal nozzle, TDC hop-up chamber with Helium™ flat bucking, and a 6.03 mm precision inner barrel.

Key Features of Specna Arms M4A1 RIS CORE™ Gen2

Technical Specifications

• Platform: M4 / AR15
• Series: CORE™ Gen2
• Length: 800-890 mm
• Weight: 2675 g
• Power Source: AEG
• Unit: HAL ETU™
• Gearbox: Æther™ V2 QSC (reinforced)
• Quick Spring Change: Yes (ESA™)
• Hop-up: TDC
• Inner Barrel: 6.03 mm
• Velocity: 115 m/s
• Bearings: 8 mm (ball bearings)
• Connector: T-Dean
• Body Material: Fiber-reinforced nylon
• Handguard Material: Metal
• Handguard Type: RIS
• Thread: 14 mm CCW

Package Contents

• Specna Arms M4A1 RIS CORE™ Gen2
• 2× S-MAG mid-cap magazine (125 BBs)
• Flip-up rear sight
• M90 spring
• Speedloader
• Vertical RIS grip
• Specna Arms stickers
• User manual

Important Setup Instructions

To use the rifle, you must activate the HAL ETU unit by following these steps, otherwise the gun will not respond:

1. Set the fire selector to Safe
2. Connect the battery and wait 3 seconds until you hear a beep
3. Pull and hold the trigger for 5 seconds until another beep is heard
4. The rifle is now ready to use