Feature：

➤ For VFC M4/AR15 GBB Gas Magazines.
➤ Compatible with both V2/V3.
➤ Compatible with VFC BCM M4 / Colt M733 / T91 / VR16 GBBR.
➤ Processed via Precision CNC Machining.
➤ Light Aluminium alloy body reduces overall weight.
➤ Exclusive Light Press Piston design puts Fluid mechanics into good use. By guiding the gas pressure into an opposite direction, the valve can be opened with a light press providing instant pressure release and can be rapidly closed for better gas efficiency.
➤ Exclusive Swappable Knock Pieces provide 3 different lengths for different rifle setups.
(※The default one is Long, different lengths marked with grooves.).