Aww... That's cute, the teacher and his students developing their relationships. But I guess the fan service is okay. Anyway, it's so funny that the series still continues to explain about the gun types and models. Also after that, they tease those guns in some sort of way. The characters are doing alright and the setting so far is so-so even though I did like episode two way better because there was action and tactics involved because it was a squad combat. Other than that, it's just all random it's even too "random" to talk about most of those scenes. I don't have any complaints much so far but I'll continue on to watch the series. Overall, the series is doing decent and is not bad compare to other anime.
Conclusion: Decent fan service, character development and funny gun teasers.