SA Daniel Defence® MK18 (SA-C19 CORE™ HAL ETU™ Gen2) - Black

Specna Arms MK18 CORE™ Gen.2 under Daniel Defence® license

The Daniel Defence® MK18 (SA‑C19 CORE™ HAL ETU™ Gen2) is equipped with the HAL ETU™ electronic processor unit, which takes the rifle’s performance to a whole new level. With this upgrade, Specna Arms moves from mid‑range into the elite company of brands offering the latest technological features as standard. The name HAL comes from the principle of the Hall effect sensor, which detects trigger sensitivity. It also increases the rate of fire and allows safe use of 7.4 V and 11.1 V Li‑Po batteries. They’ve also installed a fully redesigned reinforced gearbox called ÆTHER, capable of handling AEG springs up to M140. Accuracy is ensured by a 6.03 mm inner barrel fitted with a Helium Flat‑Hop bucking in an upgraded MAGNUS™ chamber with TDC pressure system. They’ve also included the QSC ESA quick‑spring change system, which allows you to install stronger or lighter springs at will. No need to remove the gearbox from the receiver—the spring change is done easily via the stock tube.

HAL ETU™ electronic unit features

• Trigger sensing based on magnetic Hall‑effect sensor
• Active brake
• Binary trigger (shot on pull and on release)
• Adjustable trigger sensitivity (5 levels: 20–100 %)
• Precocking pressure adjustment (6 levels)
• Programmable firing modes – SEMI (semi, binary, AUG, sniper‑delay)
• Programmable firing modes – AUTO (auto, semi, 3‑rnd burst, 5‑rnd burst)
• Easy programming via trigger
• Battery‑low warning
• Ready for use with brushless motors (e.g. Specna Arms Dark Matter or Warhead)

Exterior rifle design

The Specna Arms Daniel Defence® MK18 (SA‑C19 CORE™ HAL ETU™ Gen2) replica shines with a high‑quality external finish of its nylon body, featuring a matte texture that gives a very realistic feel. Reinforced with glass fibers, it remains strong yet lightweight. The outer barrel is metal, and the screws, ejection port, and pins are actually steel. The ergonomic AR‑15 design and modern construction ensure comfortable handling and easy operation. This rifle simply fits the hand! The CNC metal RIS handguard MK18 allows attachment of accessories like a grip, AN/PEQ box, flashlight, etc. With the adjustable Crane‑type stock, the rifle adapts to various gameplay situations and accommodates batteries (Buffer‑Stick, Nunchuck, or Crane). Overall, it’s a rifle combining lightweight build and excellent internals at an attractive price.

Technical Specifications

• Drive type: AEG
• Material: Nylon, metal, polymer
• Length: 700–780 mm
• Weight: 2405 g
• Velocity: 115 m/s (1.40 J)
• Inner barrel length: 270 mm
• Inner barrel diameter: 6.03 mm
• Hop‑up: Adjustable, TDC
• Firing modes: Semi, Full‑Auto
• Barrel thread: 14‑mm CCW (left‑hand)
• Handguard: RIS
• Battery: 11.1 V Li‑Po (not included)
• Connector: T‑Dean
• Suitable stock types: Crane (Buffer‑Stick, Nunchuck)
• Magazine capacity: 125 BBs (Mid‑Cap)
• Motor type: Carbon brush

Package Includes

• Specna Arms MK18 AEG rifle
• 2x S‑MAG magazine (125 BBs)
• Flip‑up sights
• RIS grip
• T‑Dean to small Tamiya adapter
• Spare weaker spring (M90) for CQB
• Specna Arms stickers
• User manual

Warnings

• Some aftermarket springs are overpowered (e.g. M130 ≈ M140‑150), potentially exceeding gearbox limits. Use only Specna Arms springs. If using other brands, stick to M120 springs to avoid damage.
• When installing progressive‑wound springs, ensure the end with tighter coils faces outward from the gearbox.
• Never store the rifle with the battery connected.

How to Activate the Rifle

To fire the rifle, you must activate the HAL ETU™ unit following this exact procedure, otherwise it won’t respond to the battery:

1. Switch the fire selector to Safe.
2. Insert the battery and wait 3 seconds for the beep.
3. Hold the trigger for 5 seconds until the second beep.
4. Now the rifle is ready to use.