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SA M4 CQB M-LOK Gen2 (SA-F08 FLEX™ HAL ETU™) – Half-Tan
Specna Arms M4 CQB M-LOK Gen2 (SA-F08 FLEX™ HAL ETU™) in black & tan finish is a high-performance airsoft rifle with 115 m/s power and upgraded internals. It features a HAL ETU™ processor unit with pre-cocking and trigger sensitivity adjustment. The nylon body and M-LOK handguard ensure excellent handling, while the TDC hop-up chamber with Helium™ flat bucking delivers great accuracy.
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Why Choose M4 CQB M-LOK FLEX™ Gen2 from Specna Arms?
Specna Arms M4 CQB M-LOK Gen2 (SA-F08 FLEX™ HAL ETU™) is built around a lightweight yet durable FLEX™ series nylon body reinforced with glass fiber, offering a realistic matte finish and long-term durability even under heavy use. Compared to cheaper alloy bodies, it provides better resistance to impacts and wear. The nylon outer barrel with a 14 mm CCW thread and steel components such as pins, screws, and the ejection port add strength where it matters most. The result is an extremely lightweight yet durable assault rifle platform, ideal for CQB environments and fast-paced gameplay. Controls follow the familiar AR15 (M4) platform, making handling intuitive. It features an ambidextrous charging handle, a clear fire selector, and easy hop-up adjustment through the ejection port. The M-LOK 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 precise shooting. The battery is stored in the stock, allowing use of buffer stick, nunchuk, or crane batteries. Overall, this rifle combines low weight, modern construction, and upgraded Gen2 internals in one affordable platform. The FLEX™ Gen2 series stands out with durable construction and internal components 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 M4 CQB M-LOK FLEX™ Gen2
Technical Specifications
- Platform: M4 / AR-15
- Series: FLEX™ Gen2
- Length: 680-760 mm
- Weight: 2210 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: Fiber-reinforced nylon
- Handguard Type: M-LOK
- Thread: 14 mm CCW
Package Contents
- Specna Arms M4 CQB M-LOK FLEX™ Gen2
- Hi-cap magazine (300 BBs)
- Flip-up sights
- M90 spring
- Specna Arms stickers
- User manual
Important Setup Instructions
To use the rifle, you must activate the HAL ETU unit by following these steps:
- Set the fire selector to Safe
- Connect the battery and wait 3 seconds for a beep
- Pull and hold the trigger for 5 seconds until another beep is heard
- The rifle is now ready to use
| Variants | FLEX™ Gen2 |
| Color | Half - Tan |
| Muzzle velocity (m/s) | 115 (m/s) |
| Recommended weight of ammunition | 0,25g - 0,28g |
| Thread (mm) | 14- (mm) |
| Outer length MINIMAL (mm) | 680 (mm) |
| Outer length MAXIMAL (mm) | 760 (mm) |
| Inner barrel length (mm) | 255 (mm) |
| Weight (g) | 2220 (g) |
| Body/receiver material | ABS / Plastic |
| Mounting System | M-LOK |
| Gearbox version | V2 - ESA™ |
| Amount of piston teeth | 14 |
| Bearings (mm) | 8 (mm) |
| Bearings (material) | Metal |
| Piston head | Plastic |
| Nozzle | Metal |
| Spring guide | Plastic |
| Hop-Up chamber material | Plastic |
| Battery type | Buffer stick |
| Connector type | T-Dean |
| Magazine material | Plastic |
| High-cap / Mid-cap | High-cap |
| Magazine capacity | 300 |
| Processor unit | YES |
| Blowback | NO |
| Battery included | NO |
| Battery Charger | NO |
| Weapon accessories | Yes |