What do i have here?

[pdec]

I know nothing about it but I see a swastika on it

 

[BHPSteel]

Wrong direction. That's not a Nazi swastika.

Might be a Chinese Type 24 rifle.

Edit:
Kinda-referenced here: https://www.gunboards.com/threads/markings-on-chiang-kai-shek-type-24-mauser.272160/

And here

Deactivated Rare Type 24 Chinese Rifle - Modern Deactivated Guns - Deactivated Guns

We undertake deactivation and firearm repair work in our custom built and well equiped workshop. We buy and sell deactivated world war 1 and 2 German and Allied firearms, guns and militaria.

www.deactivated-guns.co.uk

 

[rumrunner55]

It is a Cheng Kai Shek Chinese Mauser

 

[FreedomUSMC]

Yep! Chiang Kai-Shek Type 24 Zhongzheng Mauser

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Wikiwand - Chiang Kai-shek rifle

The Type Chiang Kai-shek rifle , also known as the Zhongzheng/Jiang Jieshi Rifle , Generalissimo rifle, and Type 24 , named after the Chinese Generalissimo Chiang Kai-shek, was a Chinese-made copy of the German Standardmodell rifle, the forerunner of the Karabiner 98k. Pre-production of the...

www.wikiwand.com

 

[mo mauser]

Chinese. I've seen a few of these chambered in 7.62x39. They didn't look rebarreled so I suspected a chamber insert. Was never curious enough to try one.