In a DIY session that was part engineering and part puzzles, Gun Blue48 took a standard Tokyo Marui M4A1 MWS Carbine and gave it a dramatic facelift into an MK12 Mod H. The project focused entirely on external aesthetics, trading the classic service rifle look for a more specialized silhouette. Using a new kit featuring a sleek, round handguard in Flat Dark Earth and a fresh outer barrel, Gun Blue48 aimed to turn a reliable baseline airsoft gun into something a bit more tailored to personal taste.

Gun Blue48 conducts a disassembly of the BOLT FN SCAR SC B.R.S.S. electric airsoft rifle. He starts by removing the stock and the inner barrel, then extracts the main feature: the approximately 400-gram recoil weight unit. He continues by taking out the grip and the high-torque, 32,000 RPM motor.