G&G HOP UP PRECISION ROTARY STYLE CHAMBER M4-M16 series
Set of small parts for MASADA Hopup chamber. Except spring made of plastic. Compatible with the original A&K, CyberGun, PJ or AirsoftPro chambers.
Hop-up group, Model Precision Chamber VER.2 M4, SHS brand
VFC hop up chamber HK 417, 416, M4, M16 VFC V2
The second generation of AirsoftPro Hop-Up chamber for M249 machine guns. It's made entirely from one piece of 6061-T6 aluminum alloy with a red anodised finish. This material excels in high strength, yet it's lightweight.