During time i watch for news from Syria/Iraq, i saw plenty of crazy, interesting or funny DIY/homemade weapons that IMO deserved separate topic.
Syrian 220 mm MLRS on pick-up chassis.
Truck with AA gun inside
Hell cannons (Syria):
Radicals also made a SPG with those hell cannons using unusual chassis...
https://www.youtube.com/watch?v=Vx8EaPr6C0I