I just watched commando a few days ago. i got it on dvd. His arms are huhge, but he is VERY cut up in this film. Notice the scene when he row the board to to the island, he flexes his back and chest.... very cut.
I also watched eraser the other night. His biceps are huge here too. they almost look fake in some angles. It's like he implanted huge oval balls under his skin LOL.
Arnold rules!