The Whatwhat has spoken.
Seriously though, you dumb fucks should be focusing on the "why" things played out like they did, rather than, "HANK, Y U NO DEADZ? DAT WUZ BIG GUN!!"
-Why would they show the Nazi looking down the scopes of their gun, cutting to Jesse in the car, then back to the Nazi with a "hmm" look on his face?
-Why would they film a shootout at the OK Corral gun fight, where nobody gets clipped?
-Why would they clearly show the Nazi's have little regard for Walt by firing right through his vehicle to get the Cops?
-Why would they purposely write and film to end the episode shortly after the bullets start to fly? (Confirmed by Michelle MacLaren and Dean Norris this week in interviews)
-Why would they keep Hank and Gomi alive, going in to next episode?
So instead of trying to figure out whether or not they had the correct calibur of gun to penetrate an engine block, maybe you should wonder how they are going to use Hank. Because they clearly have better ideas than for him to just get is bald dome blown off in a gun fight.
This isn't Lost. Things actually happen for a reason.