I am about 75% done with my first build. On my first build I have a Vltor MUR upper, Mega forged lower, Noveske NSR handguard, Loki weapons lower parts kits, and a Loki 16" nitrided chromoly barrel. Still need a buffer assembly, bolt carrier group, gas block and, muzzle break.When all is said and done, I will have about $1,200 invested in this build minus optics. I can deal with those numbers, is good so far? I want to do a 2nd build with a 18" or 20" barrel in 556, but I'm getting a lot of mixed reviews. I want a barrel that is going 1st accurate, 2nd last a long time (medium amount of shooting), and 3rd doesn't break the bank to build. Build #2 will be a punt the same as my 1st, except barrel length and I might use a Noveske gen 2 forged lower. My biggest concern is the barrel. I've read and heard both sides and seen test result supporting both nitrided chromoly and stainless barrels. As far as accuracy goes, I've been told they are about equal, but the opinions start with barrel life, corrosion resistance, and wear resistance. I would like to get wisdom, knowledge, and expertise between the 2.