Time to let this one go. I have a new (only factory test fired) Alpha Shooting Sports .300 Blackout on a Palmetto State Armory lower. The upper is 16" with a 1:8 twist. .300 AAC Blackout chamber with M4 feedramps. Blackhawk 6 position stock and Blackhawk Ergo grip. Only asking $750 shipped to your FFL (please make sure they accept transfers from a non-FFL). Will accept a postal money order, discrete paypal gift or +3% payment. Thanks for looking!