I have been looking around at some polymer lowers recently and am wondering if anyone has tried them on a build? From what I read online, they have problems with cracks in the receiver, light primer strikes (if components are polymer), not being able to take regular wear and tear, and poor performance in cold weather. Those are just the most common problems that have come up. I see these lowers are quite cheaper than metal ones. Clearly, they should be cheaper because it is easier to produce, but does the lesser cost represent lower quality?