Comparison of Mil-Spec and Commercial AR-15 Collapsible Stocks

Mil-Spec Stock Characteristics A Mil-spec stock is required when you have a mil-spec buffer tube. The buffer tube is also called the lower receiver extender. Mil-spec tubes are smaller in diameter and have threads that are larger than the actual tube. The mil-spec tube is ~1.48″ in diameter. Mil-spec tubes also tend to have stronger… Continue reading Comparison of Mil-Spec and Commercial AR-15 Collapsible Stocks