The Rifle Tube Spacer is designed for installation inside a 9.68-inch rifle receiver extension. Once installed, it reduces the tube’s usable internal length to approximately the same dimensions as an A5 receiver extension.
This allows an AR-15 buffer, including the approved H3 configurations shown on the Lima Six buffer system chart, to be used in a rifle-length tube. The spacer measures .975-inch in outside diameter and 1.965 inches in length.
Use the Rifle Tube Spacer only with the buffer, spring and Spring Booster combinations shown in the Lima Six Buffer System Configurations chart.
