Snowsultan's Battle Bonanza set has some gun poses, but not really worth buying for just them. Panko has a "Weapon Drill" set as a freebie, which is a good starting point. DAZ have a couple of sets of combat actions poses, plus some in the Desert Soldier pockage. Do a search on "NME" on the DAZ site. They'll all need tweaking for the female figures. Remember that you can load a pose with the gun, and then save the Hand. Then if you use a pose mad for a different gun, you can restore the hand to the correct grip. If you've accumalated a few of the many girls-with-guns packs you probably have a few poses.