This ASMR video from 4UAD Smart Airsoft showcases the installation of their MAGNUS PRO AR Hop Up Chamber into a VFC M16A1 GBB. The video includes a quick look at the VFC M16A1, followed by a detailed disassembly process covering the lower receiver, fire control group, bolt, and upper receiver. The installation of the Magnus Pro AR is then demonstrated, including the crucial step of cutting the Friction Pro bucking guide. Finally, the upper receiver is reassembled, and the rifle undergoes a quick test and a satisfying mag dump.