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Rossi Neptune DEVGRU 9″ M4 AEG (ETU- Black)

Original price was: £279.99.Current price is: £249.99.

The Rossi Neptune DEVGRU 9″ M4 AEG (ETU – Black) combines a CNC-built gearbox with a high-speed 25,000rpm motor, which results in fast trigger response and reliable performance during high-intensity airsoft skirmishes. Its ETU with active brake improves shot consistency since it eliminates gearbox overspin and enhances control.

With a 6.02mm precision barrel and QD spring system, this M4 replica offers accuracy and adaptability — making it ideal for both CQB and open-field use.

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Description

Rossi Neptune DEVGRU 9″ M4 AEG (ETU – Black)

The Rossi Neptune DEVGRU 9″ M4 AEG (ETU – Black) delivers high-performance, precision-engineered internals within a robust, tactical carbine configuration — ideal for CQB dominance and urban combat scenarios. Its advanced electronic trigger unit enables rapid response times, which directly improves reaction speed under pressure, giving the edge in high-tempo skirmishes.

This AEG platform from Rossi integrates a reinforced gearbox setup with CNC machined components that sustain prolonged use without degradation. As a result of its high-speed 25,000rpm motor and ultra-tight 6.02mm precision barrel, players benefit from enhanced accuracy and consistent shot placement even during rapid semi-auto engagement.

The Neptune DEVGRU is not just about internal performance — its external construction combines lightweight durability with operational realism. A CNC-machined light bronze M-LOK handguard offers custom accessory mounting, while a functional bolt catch and one-piece outer barrel enhance mechanical integrity and realism alike.

Key Features:

  • Electronic Trigger Unit with Active Brake: Enables crisp trigger response and eliminates overspin.

  • 25,000rpm Hi-Speed Motor: Delivers rapid rate of fire and faster cycling, which aids in aggressive push tactics.

  • 6.02mm Precision Barrel: Increases projectile stability, leading to tighter groupings at mid-range.

  • CNC Light Bronze Handguard: M-LOK compatibility for modular accessory attachment.

  • Functional Bolt Catch: Simplifies hop-up access and adds authentic handling dynamics.

  • Reinforced Gearbox Assembly: CNC gears, steel-tooth piston and 8mm bearings ensure drivetrain longevity.

  • QD Spring System: Facilitates fast spring swaps to adapt muzzle energy across different sites.

  • Durable Exterior Build: Metal sights, outer barrel, stock tube, and high-strength nylon fibre stock.

  • Mid-Cap Magazines (x2): Polymer design for weight reduction and reliable feeding.

This Rossi M4 AEG measures 730mm when collapsed and extends to 810mm, offering optimal manoeuvrability in tight quarters while retaining control for longer-range shots. Its total weight of 2.95kg contributes to realistic handling, which can improve positional awareness during dynamic movements.

By combining reliable internals with a versatile, mission-ready chassis, the Rossi Neptune DEVGRU 9″ M4 AEG (ETU – Black) positions itself as a top-tier choice for players operating in varied terrain — whether clearing rooms or holding flanks.

PLEASE NOTE: The use of an 11.1v or higher battery will void any warranty unless it is specified as our recommended battery for that particular AEG. Most quality airsoft guns do not come supplied with a battery or a charger.  On the rare occasion that they do have them included this is specifically mentioned in the product listing.   If they are included they are considered free gifts supplied by the manufacturer and batteries/chargers cannot be returned if faulty. We recommend that when purchasing an airsoft gun you also purchase a new quality LiPo battery and charger for maximum reliability.

Defcon Airsoft is an Introducer Appointed Representative of Social Money Ltd t/a Dopple, a company registered in England under company number 08054296, and is authorised and regulated by the Financial Conduct Authority and is entered on the Financial Services Register under reference number 675283. Registered with the Information Commissioner’s Office under reference number ZA026178

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