Soo, I like this one as it is:
Here
And obviously I like all of these next ones too, however, I searched long and hard for some good gun poses, and could find none. So, if there is anyways to incorporate a gun into any of these next ones, that'd be awesome [or, if you don't want to draw a gun at all, that's totally fine.. or have had a gun-related pose you've wanted to try, feel free to run it by me].
Top left, bottom left, and the one just above the bottom left (arms/legs spread):
Here
Top row, first two on the right and bottom row, third from the right:
Here
.. Okay, sorry, I can be rather indecisive, and still wanted to give you an option.
Feel free to also make him hurt/injured in any of them should you so desire.