Overall, looks good. Only crit, is since you've added some plausible subtle wear over various metal parts (BTW nice touch) but not those polymer/plastic bits, especially the perforated barrel jacket albeit heat-shield?! It's designed for SF work, so highly likely there'll be noticeable discoloration and a few hard surface…
Very sharp looking stuff. I can tell you put a lot of thought into things like clean topology and making your tools easy to use. My main question would just be what role you're looking to get into? Your portfolio seems to be split between weapon art and tech art, which, lots of indie studios could use a generalist who does…