That looks like a Model 1905 Carbine that was updated during the 1930s at ASFA (Askari Fabrika, military factory) to the "1938" standard, i.e., rechambered from the original 7.65x53mm to 7.92x57mm, as evidenced by the notched receiver ring for the longer cartridge. Have you measured the barrel length, should be about 19" if it's a carbine. This is a large ring Mauser. The original Model 1905 would have had a full length wood stock. The replacement stock could have been done in Turkey during the update, or post-import in the US, it's hard to say with certainty. If that bayonet lug fits a standard Turkish bayonet (still fairly inexpensive, $30-50), I'd vote for done by the Turks, since that was one of the features standardized during the updates. The carbines and short rifles are more uncommon than the ubiquitous Turkish long rifle Mausers.