1x CNC Aluminum Hopup Chamber M4EI
Body Material: Aluminum alloy
JST-XH plug for safe balance charging
Polished inner surface for reduced friction and smooth piston operation
and improved wear resistance under high-stress builds
Waldo Dynamics Snappy Boi Recoil Spring (VFC / GHK / G&P / VT M4 GBBR) Spring Guides 1x CNC Aluminum Hopup ChamberUpgrade your M4 GBBR platform with the Snappy Boi Recoil Spring from Waldo Dynamics built for VFC, GHK, G&P, and VT M4 GBBR systems, this high performance spring delivers a snappier, more realistic recoil and faster cycling. Whether you're looking to improve responsiveness, increase realism, or fine tune your GBBR's blowback system, the Snappy Boi spring offers consistent results with durable UK made quality. Features Compatible with VFC, GHK, G&P,