Mean Arms Bearing Delay AR-15 9mm 14.5in Upper Receiver Assembly 1/2x28 Black 2101969. The ball bearings interface with corresponding features in the barrel extension and provide the lockup in battery and the delay after firing. The system can be...
Mean Arms Bearing Delay AR-15 9mm 14.5in Upper Receiver Assembly 1/2x28 Black 2101969. The ball bearings interface with corresponding features in the barrel extension and provide the lockup in battery and the delay after firing. The system can be...
