I have my Plum Crazy complete lowers in.
It have a very tight fit on the rear lug pin area. The front pin is about normal.
Love the plastic trigger and hammer. The pull has no grit and a short travel. It breaks rather clean. The buffer tube is normal AR stuff along with the buffer and spring.
The controls are all plastic. Mag release, fire control selector. The bolt catch is metal along with the pins.
This build came in just under 6 pounds. With UTG 2 piece 4 rail hand guard and a Yankee Hill gas block.
Ive not shot it yet but dry fire feels good. Balance is a touch off with the front end heavy but not enough to really bother anything.
And for price I came in just over 500$ (not counting the sights.)
I need to edit.
The take-down and pivot PINS are plastic but the trigger pins are metal.