I've had this lower for a couple months, It's never been fired with live ammunition. I have done some dry firing with snap caps as you may be able to tell by the slight hammer wear which usually indicates a weapon has been fired. Again, it's never been fired with live ammunition, snap caps only.
The lower features RRA's Two Stage Trigger and Commercial-Spec buffer tube.
The lower comes with the RRA Operator CAR stock, ERGO SureGrip and Magpul MOE Polymer trigger guard. $300 shipped to your FFL of course. Be aware of your state laws and regulations before purchasing.