Specna Arms SA-F19 Flex Gen2 Hal ETU Black

Specna Arms Daniel Defense MK18 SA-F19 FLEX Gen.2 AEG Assault Rifle 10.5" – Black

Specna Arms presents the Daniel Defense MK18 SA-F19 FLEX Gen.2, an electric AEG assault rifle built around a V2 gearbox and fed by a 300-round mid-cap style Hi-Cap magazine included in the box. The replica integrates a MOSFET/ETU unit for electronic trigger response and switch protection, along with an adjustable hop-up chamber acting on a 270 mm inner barrel for consistent trajectory control. Its 10.5" compact profile makes it suited to players who need a manoeuvrable platform without sacrificing internal performance.

This model belongs to the FLEX Gen.2 line, Specna Arms' range built to deliver factory-ready performance out of the box. It carries official Daniel Defense markings, including 'MK18' on the upper receiver and 'Daniel Defense' near the magazine well, referencing the real firearm the replica is based on. The line integrates the TDC Magnus rotary hop-up chamber, a Helium Flat Hop rubber ring, a sealed aluminium nozzle, and the reinforced Ather gearbox shell with pre-cocking and AoE inspection windows.

Build and materials

• Body and RIS rail system in nylon fibre-reinforced polymer
• Metal outer barrel, muzzle device, reloading handle, controls, dummy feed ramp, ejection port cover, pins and screws
• SF-style stock with rubber buttplate
• Precision barrel with 6.03 mm bore
• Polycarbonate piston with steel strip and steel gears
• 8 mm plain bearings
• Overall length 77.50 cm, minimum length 695 mm, weight 2185 g

HAL trigger system

• Magnetic sensor and Hall-effect trigger detection
• Active brake and binary trigger function
• Adjustable trigger sensitivity (5 levels, 20–100%)
• Adjustable pre-cocking (6 levels)
• Programmable AUTO modes: full auto, semi, 3-round burst, 5-round burst
• Programmable SEMI modes: semi, binary, AUG, sniper
• Low battery warning, compatible with brushless motors

Key features and performance

• Muzzle velocity: 380 FPS
• Fire mode: semi-auto (plus HAL-programmable patterns)
• ESA Quick Spring Change system for fast spring replacement
• 14mm CCW barrel thread
• DEANS / T-connect plug

What's in the box

• Replica
• Hi-Cap magazine (300 rounds)
• Cleaning rod
• Allen key
• Small Tamiya - Deans adapter
• M90 additional spring