Well there's actually a technique Gai has that's similar to Shotgun, so it wouldn't be too far-fetched. However, I see your point, if she develops a Chakra Gun in her spare time I won't complain, could be cool. Oh lord another insane ship that's actually pretty damn good aesthetically! 

Please god no, you gotta forget about the kunai thing man. SO MUCH REGRET!

Yeah that's ...gonna be toned down a bit. After the chuunin exams she should've gotten some balls but the author thinks keeping her meek and pathetic is super cute for some reason. Even when she's 19 she's still too shy to talk to him face to face. Blegh.