You can easily tell someone who knows absolutely nothing about guns. Your comment on revolvers being better than semi autos is simply incorrect, they offer zero advantages nowadays. There is a reason that they are no longer used in militaries.
"The best rifle is the MK14 EBR." There is no one best rifle for everything.
While the KABAR is a rather poor quality knife, replacing it with anything, escpecially a shortsword would be ridiculous since melee fighting just isn't really done anymore, you don't even need a knife in the first place let alone a bigger knife that would just take up more space.
"The StG44 was a MUCH BETTER assault rifle than the AK-47." Please, explain why.
You sound like someone who just plays CoD and thinks they know what they'e talking about.