Yes, it should work and fit just fine.
Yes, it should as long as it has a side receiver rail to mount too.
The Midwest Industries AK 47/74 Generation 2 Picatinny Rail Quick Detach Modular AK Scope Mount should work fine with a Riley Defense AK47 that has a side receiver mount.
The Midwest Industries AK 47/74 Generation 2 Picatinny Rail Quick Detach Modular AK Scope Mount should not have any issues with adjustment screws loosening. It will fit a Riley AK47.
The Midwest Industries AK 47/74 Generation 2 Picatinny Rail Quick Detach Modular AK Scope Mount will work with a VSKA AK47.
To mount the Midwest Industries AK 47/74 Generation 2 Picatinny Rail Quick Detach Modular AK Scope Mount to your Hellpup, you would first need to purchase and install a side mount rail, such as the Tacfire AK Side Rail for Scope Mount (linked below). You would then be able to install this scope mount to your Hellpup.
https://www.opticsplanet.com/tacfire-ak-side-rail-for-scope-mounts.html
The Midwest Industries AK 47/74 Generation 2 Picatinny Rail Quick Detach Modular AK Scope Mount is not compatible with the Zastava M70. You would need to use the YUGO pattern mount which can be found by using the link below:
https://www.opticsplanet.com/midwest-industries-akg2-yugo-pattern-ak-47-74-scope-mount.html
The Midwest Industries AK 47/74 Generation 2 Picatinny Rail Quick Detach Modular AK Scope Mount is constructed from hard coat anodized 6061 aluminum.
Because the Century Arms AK63DS does not have a side mount interface, you will not be able to install this top mount.
The Midwest Industries AK 47/74 Generation 2 Picatinny Rail Quick Detach Modular AK Scope Mount should work with a Riley Defense AK47.