I would not buy PSA products unless you actually know what you're looking at. To someone new to the AR market, all the terminology they use can be confusing. From their Premium, standard, and PTAC lines. You can't assume they use FN barrels for all of their guns, because they don't. Sometimes, it's hard to figure out what you're getting until it arrives. The PTAC line is their buget line, for $299 you're just rolling the dice. Who knows what you're getting. You might get lucky, and get one with no issues, but in this day and age in the AR world, no reason not to go with something that's a known quality. Such as the BCM upper, who are still offering free BCG's with a purchase of an upper.