Quick Answer: Male Reproductive System

No, it is not currently possible for a trans man to have a male reproductive system.  We cannot produce sperm.  We cannot *ejaculate.  Our testicles (if we have them) are silicone.  At the moment the surgical options are something of a trade off between size and the ability to get hard without mechanised assistance, seminal vesicles, vas deferens, etc. aren’t even an afterthought.  Reproduction is still a fairly new consideration for trans people.  Until recently it was assumed that sterility was desired by everyone involved.  If you’re interested in having biological children I suggest finding a doctor who can help you go through your options.

*At least, we cannot ejaculate in the same way cis men can.  I know of a few guys who can in, uh, other ways.