M*CARBO Brotherhood

Polymer Receivers

I’ve built seven AR-15’s now with polymer lowers.
Five were from TNArmsCo, in various colors.
The other two are ATI Omni Hybrids, in black.
No major issues with any of them to this point.
Minor fitment issues with a couple of the TNA.

Which one would I recommend? Glad you asked.
Unless you want one of TNArms specific colors,
I would recommend getting the Omni Hybrids.
The fit and finish is much better, in my opinion.
And they seem much stronger and more durable.

Now if I could work up the courage to try an upper.
Has anyone tried a polymer upper? Different lower?
I’m very interested to read your opinions of them.