Gunplay isn't bad, he racks a shotgun in one scene, then again a couple scenes later (maybe he unloaded the chamber in between the scenes?).
Other than that, pretty good. I wasn't counting but IMFDB says he fired the HK more times than is possible, but I remember him reloading too.
Some stuff you don't see a lot in movies - CZ hunting rifles, pretty sure I saw a VZ-58, BHP.
Ben