It's a Mauser alright - I suspect a large ring but pictures do not show this.
Flaigs of Millville ? Penna has sold it or re-barreled it to 30-06 and has removed the original Mauser safety and replaced the trigger with a side safety.
Pull the striker out with the rim of a case (empty) put a coin in between cocking piece and shroud, depress the plunger and unscrew the firing pin assy. You don't need it taken apart any motre to clean it.