Not the book im looking for, but this does seem entertaining in the same kinds of ways.

I read a book that a friend lent me in high school where orcs were the protagonists. They found a portal or time travel machine (can’t remember which) that let them travel to modern times and comandeer modern military equipment like assault rifles, tanks, and helicopters. I always wanted to finish reading it, but returned it before I could. I’ve tried searching for it but have come up empty handed.

Muppet Princess Bride

I’ve literally asked about it on rednote.