Description
Rossi M4 Sentinal Zeta 8.5″ Black
Rossi M4 Sentinal Zeta 8.5″ Black
Construction & Aesthetics
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Hybrid Build: Features a polymer receiver blended with a CNC-machined M‑LOK handguard—balancing lightness with rugged resilience
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Compact Profile: With its 8.5″ barrel, this CQB‑oriented platform is short, nimble, and ideal for tight skirmish environments.
Internals & Performance
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Gearbox: Version 2 with an 18:1 steel gearset, steel‑tooth piston (14.5 teeth), 8 mm bearing bushings, and a quick‑change spring guide—supporting durability and maintenance ease
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Trigger System: ETU Ver.1 with an electronic active brake for crisp, responsive semi/full-auto fire control
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Barrel & Hop-Up: Precision 6.02 mm inner barrel housed within metal outer barrel; equipped with adjustable hop-up for trajectory tuning
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Velocity: Delivers roughly 300–320 fps using 0.20 g BBs—well-suited for UK field standards
Ergonomics & Handling
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Size & Weight: Compact and wieldy; length varies depending on stock type, and weight typically around 2.0–2.2 kg (without battery) .
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Fire Selector: Features safe, semi, and full-auto modes for versatile engagement options
Ideal Use & Highlights
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CQB Specialist: Its 8.5″ barrel and lightweight construction make it an excellent pick for indoor or close-quarters play.
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Upgradeable Core: High-quality internal components and ETU electronics provide a strong platform for future upgrades, like mid-caps, optics, or suppressors.
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User-Friendly Maintenance: The quick-detach spring guide simplifies FPS adjustments and compliance with game rules or field limits.
Quick Specs Table
| Feature | Specification |
|---|---|
| Body | Polymer receiver; CNC M‑LOK handguard |
| Gearbox & Gearing | V2 gearbox, 18:1 steel gears, steel piston |
| Bearings | 8 mm bushing |
| Trigger System | ETU Ver.1 with active brake |
| Barrel Inner | 6.02 mm precision |
| FPS | ~300–320 fps (0.20 g) |
| Fire Modes | Safe / Semi / Full-auto |
| Weight | ~2.0–2.2 kg (no battery) |
| Length | Compact CQB length (~adjustable stock) |
The Sentinel ZETA 8.5″ is a balanced, compact AEG combining lightweight handling, reliable internals, and modern modular features—all at an attractive price point. Whether you’re focused on CQB performance or seeking a foundation for upgrades, this model is well-suited to both roles.