Note: This trial run release is like a beta.
Download it, and report the problems here.
Here are some already known problems.
-The entire model rotates when aiming. (No stuff)
-"I CANT JUMP PANDAN WHEN IM THE SENTRY!!111" (No stuff)
-Wait, this is a zombie. Then what's the point? (Exactly, The release version will fight zombies. Not you.)