Thank you ghost firearms/grid defense, I purchased this upper for my second build great quality material fast shipping great price, took it to the range shoot great and accurate 150gr at 100 yrds got a good Quarter size grouping A+++++ do recomend
*****Ammunition Notification***** Ghost Firearms test fires every custom upper to verify cycling. We do not guarantee cycling with all ammunition due to vast differences in the quality of ammunition. We will only warranty cycling with US made ammunition. We will not warranty cycling with imported, steel cased or reloaded rounds.
Please allow adequate time to build and test fire all uppers