Interesting number, my G22 Gen 2 has a much earlier prefix CCS, yet was born Jan 1997. So I'm wondering if your prefix is one of those set aside for large agencies, if so what would MNO stand for?
The biggest issue with assembling an AR isn't so much getting the parts together right - it's getting the right parts together. You'll remember the quality of a gun long after you forget how much you paid for it.
US Army 1966-69, VFW Life Member, Retired Geek