BUILT TO EXCEL: PRIMARY WEAPONS SYSTEMS ENHANCED BUFFER TUBE

摘要

The receiver extension houses the action spring and the buffer (hence the term buffer tube) and provides a mounting point for the fixed or collapsible buttstock.rnCarbine receiver extensions come in two sizes: the mil standard, which is 1.14" in diameter, and the commercial tube, which is approximately 1.17" in diameter. I say approximately here because it is not made to a standard and therefore deviations may occur.