SA M4 CQB M-LOK Rifle (RRA SA-E25 EDGE™ 2) - Chaos Bronze

Specna Arms RRA SA-E25 EDGE™ HAL² Gen.2

Looking for a fully upgraded M4 airsoft rifle with a metal body? Want a model equipped with a top-tier internal setup and the HAL² ETU electronic control unit? Need a ready-to-play set with a powerful battery and smart charger included? Then the M4 EDGE™ 2 rifle is the right choice for you. This is an improved EDGE™ Gen.2 series by Specna Arms, focusing on durability and precision-engineered metal construction of receiver with the markings of the real Rock River Arms (RRA) firearms factory. The M4 CQB M-LOK (RRA SA-E25 EDGE™ 2) replica features a completely redesigned Æther gearbox capable of handling springs up to M140. Inside, you’ll find steel 16:1 gears on 8 mm bearings, providing high rate of fire and reliability. The reinforced polycarbonate piston with 14 teeth ensures ideal AoE (Angle of Engagement) and prevents jamming. A CNC aluminum nozzle mounted on a reinforced tappet plate ensures stable air compression. The HAL² ETU control unit utilizes Hall sensors and magnetic trigger detection, featuring active brake, binary trigger, trigger sensitivity adjustment, pre-cocking, programmable fire modes and low battery alert. The newest version also allows configuration via the Specna Link™ mobile app for both iOS and Android. Precision is ensured by the 6.03 mm inner barrel combined with a Helium™ Flat-Hop bucking in the redesigned MAGNUS™ hop-up chamber with a TDC pressure system. Spring replacement is quick and easy thanks to the ESA™ quick-change system. This rifle comes with a Specna Arms 11.1V 1000 mAh Li-Po battery (20C) and a Specna Arms EASY LIPO Charger included in the set.

HAL² ETU UNIT AND ITS FUNCTIONS

• Easy configuration via the Specna Link™ mobile app (iOS / Android)
• Magnetic trigger detection based on Hall effect sensors
• Active brake
• Binary trigger (fires on press and release)
• Adjustable trigger sensitivity (5 levels from 20% to 100%)
• Adjustable pre-cocking (6 levels)
• Programmable SEMI modes: Semi, Binary, AUG, Sniper (delay)
• Programmable AUTO modes: Auto, Semi, 3-round burst, 5-round burst
• Quick trigger-based programming
• Low battery alarm
• Optimized for brushless motors (included in the rifle)
• Real-time system status monitoring via the app

Important Notes for First Use

Before firing, you must activate the HAL² ETU unit by following these steps exactly — otherwise, the rifle will not respond to a connected battery:

1. Switch the selector to SAFE.
2. Connect the battery and wait 3 seconds until you hear a beep.
3. Press and hold the trigger for 5 seconds until another beep sounds.
4. The rifle is now ready for use.

Technical Specifications

• Power type: AEG
• Material: Metal, polymer
• Length: 680–770 mm
• Weight: 2440 g
• Velocity: 115 m/s (1.4 J)
• Inner barrel length: 250 mm
• Inner barrel diameter: 6.03 mm
• Hop-up: Yes (TDC system)
• Fire modes: Semi, Full Auto, Binary, Pre-Cocking, and others
• Thread: 14 mm CCW
• Handguard: M-LOK
• Battery: 11.1V Li-Po (included with charger)
• Connector: T-Dean
• Battery type: Crane / Buffer Stick
• Magazine capacity: 125 BBs (Mid-Cap)
• Motor type: Brush-type

Package Includes

• Specna Arms RRA SA-E25 EDGE™ 2 Rifle
• 2× S-MAG Mid-Cap Magazine (125 BBs)
• Cleaning rod
• T-Dean to Small Tamiya adapter
• Speedloader
• Spare M90 spring
• Specna Arms 11.1V 1000 mAh Li-Po battery (20C)
• Specna Arms EASY Li-Po Charger

Warnings

• Some manufacturers’ springs are overrated (e.g. M130 performs like M140–150), which may exceed gearbox tolerance. Use only Specna Arms springs. For other brands, use up to M120 for safety.
• When replacing a progressive (irregular) spring, ensure the tighter coil end faces outward from the gearbox.
• Never store the rifle with a connected battery.
• Never store the rifle with pre-cocking activated. Always release the piston before storage to prevent spring damage.