How bad is it? Better than AmNinja #3 or #5, but pretty bad.
Should you see it? No.
This time around, they brought back the original star, Dudikoff, AND the star of #3, Bradley, but not Steve James (who would die in real life before #5). This one plods and meanders and manages some bad stereotyping. There's a suitcase bomb, a fortress to be stormed and 52 deaths (by someone else's count). The main character doesn't show up in the first half of the film. There was a fifth film in the series, which no one likes.