I like this new anime playing in Japan right now called Upotte!!
It's a cute schoolgirl comedy anime where the girls in their school are human forms of well known assault rifles. Funco (FN FNC) (my favorite character), Ichiroku (M16A4), Shigu (Sig 550) and Eru (L85A2) are charming. There's lot of cute comic moments in the show as well as detailed history and facts of military firearms and ammo. For those of you who haven't seen the show, I personally like to recommend this.
Here's Anime News Network's spotlight page on the show:
http://www.animenewsnetwork.com/anim.../spring/upotte