Improve Cop's Shop a Bit

It's been outdated and never updated of it's cop shop's list (Idk I only guessed.)

Two weapons are missing; I got them in my idea: It's Sawns Off and Country Rifle (Country Rifle might not needed as necessary; it's just an additional option)

And add a bulk system or something like that shown in my picture: https://imgur.com/V1jB5aT (I suggested this as without bulk buying, it would take too much time to buy enough amount of ammo.)

Also though this way that idea I got was by Khaz: "https://mikescnr.com/forum/index.php/topic,23060.msg110440/topicseen.html#msg110440"

But I improved it a little bit and orignize it in a better way

The bulk buying +1
Country Rifle addition Neutral
Sawn off:
https://mikescnr.com/forum/index.php/topic,23060.0.html - Suggested recently.
  ~ https://mikescnr.com/forum/index.php/topic,3961.msg17670.html#msg17670 - Rejected long ago.

This is why I tell people not to put multiple suggestions in one topic. I have to reject them all.