If you are not going to be running a T-1 or H-1 your best bet ( IMO) is Primary Arms ..I have their Compact scope and I "had" their comp m4 ..both held zero ..I run a T-1 on my SBR now but still use the P.A compact Scope on my 16"...for the money and service you cannot beat primary arms for "non battle proven optics " but in the end I would suggest saving up for a T-1 or H-1 you will not be disappointed