I’m looking to print an ftn4 and have a fun time time with it. Was thinking of a 300 bo sub build with a super safety. Wanted to hear opinions on good uppers for it. Was looking at PSA’s sabre-15 upper since it comes with some higher quality parts (adjustable gas block, plan b flash hider) (I am also willing to start from a stripped upper). I don’t want the rifle to be a complete poverty pony but I also don’t want it to completely break the bank. Any help is appreciated, thanks in advance