1) Combat Companion
2) #01-5

because...
a) 5" blades to honor the original 5" 1911
b) what Peter said about handle materials
c) either could be considered a combat or carry knife, so they would complement either type of 1911
d) to me, the "battlefield buddy" and the 1911 just seem to go well together
e) the Randall APFK and the 1911 are both revered classics in their field