If you saw The First Purge or the Netflix movie Burning Sands, you'd know that director Gerard McMurray has some chops. Those were both fairly low-budget movies, so can you imagine what the up-and-coming filmmaker could do with a bigger budget? Well, you won't have to imagine for long, as Lionsgate has tapped McMurray to write and direct its Michael B. Jordan-led action-thriller The Silver Bear, the studio announced Wednesday. McMurray goes way back with Jordan, having produced Ryan Coogler's acclaimed 2013 drama Fruitvale Station. This time around, instead of playing a …