The MS-115-16-17 sections were 3 ft long, figure the antenna mast base and 10 ft is OK. the secondary inf radio ant is 6 feet...ie 2 sections of the same ant MS sections. The M-41 initially carried the AN/GRC-3 radios. May have changed for S Vietamese Army but antennas should not have changed as armor frequencies stayed the same.. 20.0-27.9.