Less than 2000 M1900 Mannlicher – Schoenauers were made by the Steyr factory. Some changes were made during production. So the cartridge release button was positioned outside the right action rail on the earliest examples. Later M1900s had it set inside the rail, like all later M-Ss. Allmost all of the M1900s were originally made in military configuration with 26" barrels and big round bolt knobs, destined as military test rifles to be offered to other states, hoping for adoption and export orders. Many of these military configuration rifles were sold to the British guntrade, predominantly George Gibbs, Bristol, just like the predecessors Mannlicher M92, 93, 95 had been. British gunmakers then sporterised these rifles. Most were restocked, resighted, refinished and given a B-prefix G.Gibbs serial number. Apparently Steyr never made any full length, half stock sporting rifles themselves. But they did make a few full stocked Stutzen/carbines with the familiar "butterknife" bolt handles. Perhaps these were made from leftover parts from 1902 to 1904 as samples for the coming M1903 Stutzen. Steyr offered civilian sporters on the M1903 Greek military action from 1905 on only. Two such M1900 Stutzen , both with much later scopes and mounts, were dicussed here http://forums.nitroexpress.com/showflat.php?Cat=0&Number=315067&an=0&page=1#Post315067
As I have yet to see a Steyr factory made M1900 sporting rifle, just three such carbines, I believe Steyr never made many such sporters. They certainly stopped making M1900 actions after adoption and production of the M1903 began, though they used up leftover parts perhaps.