Yankee Hill Machine (YHM) AR-15 Handguard.  The handguard measures 12.5" in length with an ID of 1.75".  The handguard features a full-length picatinny top-rail with M-LOK mounting system at the 2, 6, and 9 o'clock positions.  The top rail is T-marked, bottom rail is B-marked, and the side rails R and L marked respectively.  Attached to the handguard is a YHM bipod adapter made from aircraft quality aluminum and hardcoated matte black to mil. soecs.  Plastic hand guard protectors are attached to the picatinny rails at the 3 and 9 o'clock positions.  Attached to the YHM bipod adapter is a Harris Engineering 1A2 Bipod.  Spring loaded folding legs are quickly adjustable for height.  Manufactured with heat-treated steel and hard alloys, the bipod has a black anodized finish.  The height range of the bipod is 9" - 13".  All components are in like-new perfect condition.