A Little Help Identifying Some Top Wood Please

[B_noser]

I suspect the wood at the bottom of the photos may be off one of the South American mausers, but there are others with similar hand guards. The wood on the top left has the same inside and outside profiles as the forward section of the lower wood, so I suspect it is off one of the mausers with a short section of top wood between the rear sight and mid band. The wood on the top right has me stumped. I would say it is an op rod cover from a semi automatic, but which semi.

Any and all help will be greatly appreciated.

Thanks for looking

 

[bearhunter]

98 Mauser and SKS

 

[gaff]

k98, sks, Swedish mauser.

 

[B_noser]

Thanks four input. I would not have guessed SKS.

 

[Coffice]

Top left could be a Carcano long rifle (M91/41 OR M1891)