Mid-Length Gas Tube – Use when modifying a rifle or carbine for a mid-length gas system or for repairing an existing mid-length installation. Includes tube only. Retain the rifle’s existing roll pin, carrier key, screws, and gas rings.
AR-15, Issue:09, Page:011
Big Book Catalog, Issue:66, Page:011
Law Enforcement / Police Store, Issue:09, Page:007
SPECS: Mid-Length Gas Tube – 11¾” (29.9cm) long.