fn 5.7

Posted here as I figured more in this section would have knowledge on the subject. Apologies if its in the wrong catagory. Q- Can you tell what gen or trigger pack comes in a PS90 by the serial number alone? If not what maybe good signs its not the 1st or 2nd gen...all without field stripping it...

Purchased a used ps90 and it came with this optic mount attached. Can anyone tell me what kind of mount it is and what optic it is designed for?

Hi all I'm new to the forum and pretty much clueless about reloading , propellants etc.so let me just throw this out there. How do you get 30 rd or so capacity, 6 inch barrel or less, 2500 fps or more velocity.reloadable cartridge.could you neck something down, or us there a 22 mag style...