Need help choosing which length upper to sbr to compliment my 20 inch m16a4 type ar
I've got a 20 inch m16a4 type rifle with a bipod and Nikon scope with a a2 stock and I'm looking to build a cqb/primary type rifle with my other complete lower. I just can't decide on if I want a factory Daniel defense 10.3 barrel with a mk18 ris II rail or a factory 14.5 Daniel defense barrel with the m4 ris II rail. Either way I'm sbring the lower and looking for which you all think would best compliment my 20 inch and your reasons why. Do you find that your 10.3 dd ar's are just as reliable? Thank you all for the help in advance.