5/10. A head-to-head race between preposterousness and astronomic production values, in which Rambo has evolved into his final commercial stage. Immune to Soviet attack helicopters and legions of Spetsnaz clowns, he now delivers ironic quips, performs self-surgery unseen in medical history, permanently shows off a reddish bodybuilder's torso (very 1980s), and obtains hi-tec bow & arrows out of thin desert air.
What bothered me the most about this movie is the ending: Rambo and his buddy are pinned down behind some rocks by the bad guys, but then a bunch of proto-Taliban types come riding their horses and swinging their sabers across this wide open expanse to save our heroes in some vulgar Lawrence of Arabia sequence. Apparently Soviets can't hit the broad side of a cavalry charge with artillery. Stupid.
This movie certainly had a large budget, but wastes an interesting, thoughtful opening with Rambo as a retired Buddhist warrior in Thailand to have tons of explosions in Afghanistan. Trautman and Rambo trading quips does not exactly work here, but Richard Crenna does get more lines than before as Trautman.