NyamNyom details the external build of a VFC/Umarex HK416A5 airsoft rifle. He shows the disassembly of the original rifle and then replaces various parts, including the handguard, pistol grip, and stock. The builder also adds a Railscales RSB/M grip, a Magpul PMAG, an EOTech OGL, a Modlite PLHv2 light, a HuxWrx EL-QD, and an EOTech EXPS/G43 with a Unity FAST/FTC mount. From there, he concludes with a full shot of the completed build and a list of all the components used.