“LEGO Heavy Weapons,” by Jack Streat; $25 from nostarch.com
The instructions show you how to make Lego block replicas of the world’s most iconic firearms, including a massive Desert Eagle handgun, with working blowback action, a compact but deadly AKS-74U assault rifle with folding stock, a “Jungle Carbine” rifle, and a pump action shotgun. Each set of instructions lists the LEGO blocks you need.
These Lego weapons actually work; that is, they fire Lego blocks. Some are semi-automatic. NOTE: Never take these out to play in public places or point them at Police for fun. The police never seem to be amused by having guns pointed at them.