Mad AK Max built his own ShAK-12 Bullpup Battle Rifle for airsoft, a project that took him some years to build as he explains on Reddit... "It is done, after 4 years of work - my master piece.
My completely hand made 1:1 full steel Shak-12 also known as ASH-12. Everything was made from scratch, with brute force, sweat, blood and tears and only analogue machines.