The Fightin' Five is a Blackhawk-style fighting group. The members are: Hank Hennesey, Tom-Tom, Irv the Nerve Haganah, Frenchy the Fox and Granite Gallero.
Their adventures and those of the back-up feature Peacemaker are continued in Peacemaker (Charlton, 1967 series).
The indicias of #28-39 say "Fightin' Five". The indicias of #40-41, #43-47, #49 say "Fightin' 5". The indicias of #42 and #48 are not yet verified.
There is a hiatus between #41 and #42. The later issues are all reprints.