Upotte!!/YMMV

Die for Our Ship: Yuri Fans don't appreciate Genkoku.
Genius Bonus: A lot of little things become more understandable to gun fans:
- L views Fal as an onee-sama figure because the L85A1 replaced the FAL L1A1 as the British Army's issue rifle.
- MAC-10's Motor Mouth is a reference to the MAC-10's ridiculously high rate of fire.
- The orange that Ichiroku wears in her hair is a reference to one of the things the author thinks about America, which is a large exportation amount of oranges. The M4A1 also has a hamburger hairclip as well for the same reason: being a well-known part of America.
- The aforementioned rivalry between the Uzi and MP5 sisters.
  - The similar rivalry between MP7-tan and P90-tan in an omake.
- L's Gag Boobs refer to the L85 being rather heavy and having a larger handguard, compared to other assault rifles; also, according to the Gun Girl anatomy book, the handguard is the bustline. (Now consider where a guy's hands usually end up...)
- 53 is considerably larger than the other elementary girls. She's based on what is, essentially, an MP5 that fires assault rifle bullets rather than pistol bullets.
- This is also related to why MP5 is repeatedly called mini-G3 (chiisai Jisuri-sempai); the MP5 is essentially a G3 in submachinegun size, chambered for 9mm Parabellum. (And also why she's apparently G3's favorite imouto.)
  - In real life, the G3 platform was so successful, nearly all of Heckler & Koch's product lines during the Cold War were derived from the G3; this is reflected in the show and manga by the significant resemblence the HK sisters have to each other.
- Funco admitting that she's not popular like Ichiroku.
  - This is true since the M16 series has been adopted worldwide from the Americas all the way to Asia and Europe. This is unlike the FNC since a few number of countries have adopted it like Belgium and Venezuela while the rifle has been adopted by Indonesia and Sweden under license.
- Crossing into Incredibly Lame Pun territory; when Sensei is reading up on Gun Girl anatomy their back side is the equivalent to a rifle's stock or butt.
- 16 eats an impossible hot chicken nugget and then yells at Funco, saying she's delicate, and later jams; this is a reference to the M16's ill-advised change of ammunition propellant powder in Vietnam, which caused a lot of problems with jamming.
- In Episode 3, 16 is shown meticulously cleaning herself, even though she didn't go out like the other gun girls; the M16 family of weapons requires a lot of cleaning, due to the direct impingement operating system, which has been described "eating where you shit at."
  - Also, the 18's mention of balls getting stuck to 16 - in Vietnam, the US Army switched to ball powder propellant for the M16's ammo (as opposed to stick powder for the M14). This, coupled with the direct impingement system, causes carbon deposits and powder residue to build up in the working parts.
- In episode 9 when the girls bring out some modern rations Ms Thompson coments that "Back in my day they used to eat canned food all the time", which is true of World War Two era rations.
Les Yay: Funco has at least three admirers among the other students.
The Woobie: L. Her history makes FNC and the submachine gun lolis cry and give her hugs. When England finally created a new low-caliber bullpup rifle model in 1985, she was prone to jamming, breaking and would be thrown away after about 100 uses. The Special Air Service actually gave up and abandoned the L85 for the M4A1 (a compact version of 16's M16A4) and G36C carbines.
- And then to add further insult to injury, in Episode 4 she breaks her firing pin, and is depressed for much of the episode, especially after 16 repeatedly calls her a dud. This became worse in the jungle wargame arc when Funco remembers the times when L can't attend a wargame ranging from tripping herself to stomach pains or trips to the nearby hospital.