The Kragrear-sight, mounted on the barrel, is the rifle version of the model 1896 sight.
The hand-guard is a rifle hand-guard.
The stock is the 'long forearm' carbine stock that came into use with the model 1899 carbine. It appears to be a nice stock and did not require alteration for the Redfield 'no-drill' sight base. The stock is worth close to what your friend paid for this 'parts gun'.
The Redfield #70-K sight required that the magazine cut-off be removed. The receiver sight base is held on by a sheet metal hook that is anchored at the cut-off opening and a longer (Redfield made) side-plate screw (rare). This is a desirable after-market sight, when complete.
A regulation side-plate screw and cut-off switch are easily found on ebay.
Attachment 86720Attachment 86721Attachment 86722