SA M4 Carbine RL M-LOK Gen2 (SA-F05-RL FLEX™ HAL ETU™) – Green

Why Choose M4 Carbine RL M-LOK FLEX™ Gen2 from Specna Arms?

Specna Arms M4 Carbine RL M-LOK Gen2 (SA-F05-RL FLEX™ HAL ETU™) is built on a lightweight yet durable FLEX™ series RL AR15 nylon body reinforced with glass fiber, offering a realistic matte finish and high durability, outperforming cheaper alloy receivers. This model belongs to the RL SAAS (Specna Arms Accessory System) line, featuring a more aggressive design that visually stands out from standard AR15 receivers. The outer barrel with a 14 mm CCW thread and steel components such as pins, screws, and the ejection port add strength where needed. The result is a lightweight yet durable assault rifle that handles excellently and is perfect for CQB gameplay and dynamic movement. The AR15 (M4) platform ensures intuitive controls, including an ambidextrous charging handle, fire selector, and easy hop-up adjustment via the ejection port. The M-LOK handguard allows mounting accessories such as a foregrip, tactical flashlight, or PEQ box. The Light Ops stock with rubberized cheek rest and QD sling points keeps the setup lightweight and stable. The battery is housed in the buffer tube, requiring a buffer stick battery. Overall, this rifle combines low weight, modern construction, and high-quality Gen2 internals in one accessible platform. The FLEX™ Gen2 series stands out with components such as the Æther™ gearbox, HAL ETU™, metal nozzle, TDC hop-up chamber, Helium™ flat bucking, and a 6.03 mm precision inner barrel.

Key Features of Specna Arms M4 Carbine RL M-LOK FLEX™ Gen2

Technical Specifications

• Platform: M4 / AR-15
• Series: FLEX™ Gen2
• Length: 760-850 mm
• Weight: 2270 g
• Power Source: AEG
• Unit: HAL ETU™
• Gearbox: Æther™ V2 QSC
• Quick Spring Change: Yes (ESA™)
• Hop-up: TDC
• Inner Barrel: 6.03 mm
• Velocity: 115 m/s
• Bearings: 8 mm
• Connector: T-Dean
• Body Material: Fiber-reinforced nylon
• Handguard: M-LOK
• Thread: 14 mm CCW

Package Contents

• Specna Arms M4 Carbine RL M-LOK FLEX™ Gen2
• Hi-cap magazine (300 BBs)
• Flip-up sights
• M90 spring
• Specna Arms stickers
• User manual

Important Notice Before First Use

To start using the rifle, it is necessary to activate the HAL ETU unit by following this exact procedure, otherwise the rifle will not respond to the connected battery:

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 you hear another beep
4. The rifle is now ready to use