That 1st gent looks like a Michigan National Guardsman with a Model 1899 Remington-Lee (in .30-40) and a navy blue Mills belt which includes pockets for spare mags and Remington bayonet! - Great Picture - Please tell me more!
That second gent seems to have some type of Trapdoor Musketoon. It has a sling-bar with ring and appears to have only one barrel-band. Neat, I am not familiar with this variation. Could it be a Model 1886 experimental carbine? Great Pictures! Thanks.