Rossi M4 Sentinel 5,5″ TAU (Tan)

Construction & Aesthetics

• Build: Reinforced polymer receiver paired with a 5.5″ CNC-machined metal handguard featuring M‑LOK slots—a perfect mix of durability and lightweight handling.

• Finish: Two-tone malleable in tan and black, showcasing a tactical, stealthy look ideal for CQB environments.

Internals & Performance

• Gearbox: Version 2 gearbox equipped with robust 18:1 steel gears, steel-tooth piston (approx. 14.5 teeth), 8 mm metal bushings, quick-detach spring guide, and a programmable ETU with active brake—ensuring crisp response and segmenting fast shooting capabilities

• Barrel & Hop-up: Precision 6.02 mm inner barrel (≈229 mm length) inside a sturdy outer barrel—enhances accuracy. Adjustable hop-up lets you fine-tune for different ranges

• Velocity & FPS: Shoots between 300–330 fps using 0.20 g BBs—well-suited for UK indoor/outdoor field limits

Ergonomics & Adaptability

• Length & Weight: Compact CQB-ready size—approximately 700–780 mm overall, weighing ~2.07 kg (without battery)

• Stock & Sights: Equipped with an adjustable (crane-style) buttstock and flip-up polymer iron sights—quickly deployable and zero-able

• Battery/Cabling: MOSFET-equipped wiring allows use with 7.4 V LiPo (7.4 or higher recommended), though battery and charger are not included

Mags & Extras

• Magazine: Supplied with a tan 300‑round hi‑cap magazine—ample ammo capacity for rapid engagements

• QD Spring Guide: Enables fast spring swaps to keep FPS within field or regulatory limits.

Spec Summary