Description
The FPS Tune‑Up Kit for M4/M16 (KITM4E1) is a high‑performance internal upgrade set designed to improve air seal, consistency and overall efficiency in any Version 2 AEG platform. Fully CNC‑machined from ERGAL aluminium and 100% made in Italy, this kit delivers a reliable, measurable boost to your rifle’s performance.
Inside the kit you’ll find three precision‑engineered components:
- ERGAL Air Nozzle for M4/M16 (SPM4E) — lightweight, durable and machined for a perfect seal to maximise compression.
- ERGAL Cylinder Head V2 (TC02A) — reinforced construction with optimal impact cushioning for smoother piston contact and improved longevity.
- CNC ERGAL Double O‑Ring Ball Bearing Piston Head (TPAE) — dual O‑rings ensure maximum air seal, while the ball‑bearing core reduces spring stress and enhances gearbox cycling.
This combination significantly improves FPS stability, air efficiency and overall gearbox smoothness.
100% Marui‑compatible and 100% made in Italy, it’s an ideal upgrade for players who want dependable, high‑quality components without unnecessary complexity.





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