How exactly do we know that this weapon is a Desert Eagle? I don't see any of the distinctive features...
It isn't. Unless this is somehow a custom Desert eagle with alternate top half that slides most of the way, not counting the barrel end. Pity that my vocabulary with this stuff is limited.
Looking at Imizu's history with Reisen though, it's been often that she is with a M1911. Could it be possible this might be somewhat of a custom m1911?
Obviously some form of semi-custom 1911 longframe.
I might even go so far as to narrow it down to an STI 2011 frame (with the polymer insert and wide magwell).
It has to be this, with an attached custom weight. Imizu's Reisen though, is a girl that goes after my heart. Badass, 1911 fan...and would shoot me through the heart if I tried to come on to her.