That is a really good question.
Not a DMR, for that I wish to build a dedicated rifle later on.
Not a PDW, gonna build a 1911 for that one day.
(yes I have lots of builds in mind)
So I'm guessing an "all purpose" or CQB.
Unsure what a "service rifle" describes?
Thanks
Perhaps start with a 14.5" or 16" carbine... You can use it for CQB and it'll hold up for SR... Won't make little ragged holes at 300+ but you should be able to score.
The build a purpose base rifle after



















































