Recently read on AR15 forums one guy's opinion ranking manufacturers. His comment when it came to PSA was that their Premium line rifles were mid-grade (on par with Aero and Spikes), the Freedom line was a step below (S&W M&Ps, Ruger, Springfield Armory, DPMS, Bushmaster) and their PTAC line being at the bottom (Radical, Bear Creek, Anderson).
From browsing their upper kits for quite some time, I never understood what differentiated Premium vs Freedom vs PTAC, or really understood what went into those designations. There are yet other uppers that do not include one of those three designations at all. Can anyone elaborate on the differences? Or are the differences wrapped up in the extras that are also commonly listed in the description: M-LOK, MOE, EPT, MBUS sights, etc.?