Vader's helmat is a KABUTO, not a swiss army job.. sheesh no samurai in his own right would be caught ded in an ordinary 'fritz' helmet.
and George Hill.. shame on you for missing the modified FN/FAL on tatooine in the first film, its almost as prevalent as MG-34's and 42's.. though the whole front end is encased in a mufffler pipe.
Notice the variety of AK's and Valmets on Hoth and Endor.. apparently freedom fighters the universe-over use Sgt. Kalishnikov's rifle.
The scope on Han's pistol just looks cool.. notice ith the first film its off-set to allow brass to eject/load blanks where as in later films the scope sits right on top.. evidence that the prop guns are now butane firing non guns (see logan's run)
But i always like that about star wars.. the technology looks more real, more functional.