The AB-86/GRA-4 is a 40 foot mast primarily used for supporting wire antennas. The mast consists of sixteen AB-85/GRA-4 3 foot long sections that are guyed at three levels with adjustable rope guys. The mast is erected flat on the ground and pulled up into place using the guy ropes and a pivoting base. Manual TM 11-2651 covers the maintenance and operation of the AB-86/GRA-4 mast as part of the AN/GRA-4 and AN/GRA-12 antenna groups. The complete kit weighs about 85 pounds and is approximately 38"L x 11"W x 11"H.
These are widely available in surplus in varying conditions. Bent poles and missing guy ropes are common. The complete contents of the kit including spares is shown in the packing list.
We pictures below are of NSN 5985-00-257-2927. We do not have any stock of this mast.