I like the expressions and the contrast in the black and white images. They are punchy, moody and the cut off appendages work well in the images to create mood. For example the arm in the shot of the girl sitting down and looking like she might cry, it is pretty foreboding.
As for things to improve some of the shots are lacking a little in depth of field like the shot weapons of choice where the guy in the left is out of focus. It is however a bit difficult to give advice since we can’t see exif and and see if it is even feasible. On the whole I think you’ve done well however some shots are let down by not having everything sharp that should be sharp.