m77The Zastava M77 B1 is a battle rifle developed and manufactured by Zastava Arms in Serbia (formerly Yugoslavia). [3] It was introduced in 1977. [4] It is a derivative of the Zastava M70The M77 motorway is a motorway in Scotland. It begins in Glasgow at the M8 motorway at Kinning Park, and terminates near Kilmarnock at Fenwick, becoming the A77 dual carriageway.