You have what was originally a cock-on-closing Mauser 1893 (Model 93) as made, usually in 7x57, for the military of Chile, Spain & Turkey.
It doesn't have the safety improvements of the later, cock-on-opening Mauser 1898 (Model 98), and will eventually suffer under even factory ammo - as owners sadly found out with the specimens altered to 7.62NATO, which is a low-powered .308 Winchester, the parent cartridge of the .243 Win.
Yours has had the flag safety lowered & elongated, and the triggerguard bow tapered (front to rear), along with the custom stock.
The trigger looks to be the original non-adjustable military issue.
What's done is done, and as posted above, you are well advised to keep your handloads low & slow.