Replica Airsoft M4 Flex SA-F19 FLEX HAL Gen 2 ETU MK18 Daniel Defense (Specna Arms)

This 10.5" AEG rifle from manufacturer Specna Arms features branding from Daniel Defense, an American manufacturer of firearms and accessories.

The Specna Arms FLEX Gen.2 series of rifles was designed to provide the best possible user experience at an attractive price point. Built on a foundation of experience, passion, and commitment, this series has been refined to deliver even better performance—offering a product that is ready to use straight out of the box and capable of handling any challenge on the airsoft field. To this end, the Flex Gen.2 replicas are equipped with:
- A Magnus™ TDC (Top Down Center) rotary hop-up chamber, allowing for highly precise and stable adjustment (protected by European patent no. 015052069-0001)
- An Helium™ Flat Hop bucking, which improves BB flight stability
- An airtight aluminum nozzle
- An Æther™ gearbox—a reinforced shell featuring:
a main spring release function
inspection windows for checking pre-cocking and AoE (Angle of Engagement)
a reinforced front section
inspection windows to facilitate gear shimming
a trigger adjustment function
screw holes for precise alignment of the gearbox shell
Compatibility with M140 springs

Features of the HAL™ system:
- Trigger detection based on magnetic sensors and the Hall effect
- Active braking
- Binary trigger
- Adjustable trigger sensitivity (5 levels, from 20% to 100%)
- Adjustable pre-cocking (6 levels)
- Programmable AUTO firing modes (automatic, semi-automatic, 3-round burst, 5-round burst)
- Programmable SEMI firing modes (semi-automatic, binary, AUG, sniper)
- Easy programming via the trigger
- Low battery warning
- Compatibility with brushless motors

**The AUTO function fires a 3-round burst first, then switches to full-auto mode.

The Daniel Defense MK18 SA-F19 FLEX Gen.2 AEG 10.5" is a lightweight and compact 10.5-inch airsoft assault rifle, manufactured by Specna Arms. The model features the "MK18" marking on the upper receiver and "Daniel Defense" on the magazine well. This rifle is lightweight, compact, and robust.
The receiver and the RIS handguard are constructed from nylon fiber-reinforced polymer. The RIS system allows for the attachment of various accessories, such as grips, flashlights, or lasers.
Only the outer barrel, muzzle device, charging handle, controls, mock bolt carrier, ejection port cover, and all pins and screws are made of metal.
At the rear of the rifle is a comfortable SF-style stock, equipped with a rubber butt pad.

Due to its compact design, this model is perfectly suited for CQB (Close Quarters Battle) engagements. The ESA™ Quick Spring Change (QSC) system allows for easy and rapid spring replacement, enabling the SA-F19 to be adapted to specific scenarios.
This feature will be appreciated both by newcomers starting their journey into the world of airsoft and by experienced players looking for robust replicas that feature licensed markings. In addition to the internal components already mentioned (Magnus™ TDC hop-up chamber, Æther™ gearbox shell, flat-type Helium™ hop-up bucking, and an air-sealed aluminum nozzle), the replica also features:
- 8mm bushings
- Steel gears
- A polycarbonate piston with a full-length steel rack
- A high-quality 6.03mm precision inner barrel

The box includes:
Cleaning rod
High-capacity (Hi-Cap) magazine
Replica
Allen key
Small Tamiya to Deans adapter
Additional M90 spring
Not included:
The kit does not include a battery or a battery charger.
ATTENTION!!

When powering on the replica for the first time—immediately after connecting the battery—you must hold down the trigger for approximately 5 seconds while the selector is set to "SAFE" in order to initialize the HAL™ module.

Note: To prevent potential malfunctions, we recommend using a 7.4V battery when using an M90 spring.