Plum Crazy polymer lower assemblies?

[RStewart]

I have one on my 16" tactical for deer hunting. Works well and keeps the rifle light. I also have another on a CMMG upper. Ive put several hundred rounds through mine with no issues. Its fine for plinking and hunting. I'm not sure how well it would do under "combat" conditions. But since I'm not in combat, it's a moot point.
Most who put them down have not actually owned one. The lower does not heat up, so being made out of polymer is not a concern. If you don't like the polymer trigger, it is easily changed out. IMHO.