Feature：

➤ For VFC spec V3 M4/AR15 HK416 GBB.
➤ Requires no modification and simple drop-in-to-use with VFC V3 M4 GBB.
➤ Make sure the hammer is cocked and then install the conversion kit onto the VFC V3 M4/AR15 lower receiver with the gas bolt.
➤ Requires the factory front set or other VFC V3 M4 GBB front set of any length.
➤ Easy and effortless operation of bolt action handle.
➤ Keep the bolt hold open functionality, press bolt release or swap a new mag to rechamber.
➤ Adjustable nozzle valve design, can be adjusted with M1.5 allen key.

➤ GHK V2/V3 M4/AR15 HK416 GBB.
➤ Requires no modification and simple drop-in-to-use with GHK M4 GBB.
➤ Make sure the hammer is cocked and then install the conversion kit onto the GHK M4/AR15 lower receiver with the gas bolt.
➤ Requires the factory front set or other GHK M4 GBB front set of any length.
➤ Easy and effortless operation of bolt action handle.
➤ Keep the bolt hold open functionality, press bolt release or swap a new mag to rechamber.
➤ Adjustable nozzle valve design, can be adjusted with M1.5 allen key.