I would love to do a commentary, my microphone broke and all I have is crappy back-up, and I really do not want to damage anyone's ears with that.
The TSMG is pretty deadly up close, OP. After around 50 ft, the damage on it becomes putrid (evident by the poor base range stat). Pretty much, this gun is born to play on CQC maps such as Helodeck and Heavy Metal. The TSMG receiver also does not allow customization of the barrel, nor the stock. This particular receiver took me 6 chance packs to get.
Please leave any questions/comments/concerns as a comment, and I will do my best to answer in a timely manner.