This was my first model i made its not bad as proportions are correct.
however there are many negatives as the gun is very boxy and unrealistic compared to my references, This is the main negative however its a big issue, which would destroy immersion.
reference:https://cdn3.volusion.com/knqkd.pxjkx/v/vspfiles/photos/HK-MP5SD-2.png?1557517656