I wouldn't even call them variants. To me they're all Jack Hammers (Jack Hammer, SFM-1, and Axe Hammer). I would call the Jack Hammer a SJTAC variant, though.
Last edited by Spider-Pig; 06/02/1410:22 AM.
USMC 1997-2002. 6173 CH-53D Sea Stallion Helicopter Crew Chief and Flightline Mechanic. Semper Fi!