I use 7.5 for flash suppressor testing and silencer durability testing. Otherwise I would never go below 10. If I could own two rifles I would probably with with 10.5 and 18.5. If I could own one, I would probably go with the Noveske 12.5.
Upon closer inspection of the Noveske link you posted, looks like there is a charging handle on there… and it does state 'complete upper ready to be installed on complete lower"
I should have read closer, but will call NRW to clarify.
I’m going with the 7.5 as a range toy… just something to play with for now:) (And I’m fortunate to get .223 for free, so the 9mm is out…)