You have two choices. 1. Go to www.crosman.com and click on "download a manual." Find a diagram for your 766 and try to repair it yourself. or. 2. Go to www.crosman.com and click on "find a service center" and locate one near you and have it repaired.
See the link below for a view of the Crosman 766
Crosman has the parts diagram online. There were 3 different versions. See the link below for the first version. http://www.crosman.com/pdf/manuals/crosman/766/C766-EVP1.pdf
There are 3 versions of the 766 see the link below for the owners manual and parts list.
See the link below it has all the Crosman Owners and Parts manuals online.
You mean "Pellets". See the link below
Crosman doesn't make the Grizzly, Daisy does. $40
Crosman offers a service to locate repair shops that repair older Crosman air rifles. See the link below
They are .175 caliber
6mm are the best for it.
They were made by both Daisy and Crosman. Any BB gun model starting with 799 was a Daisy and any BB gun starting with model number 126 was a Crosman.
The Crosman 1088 Pellet/BB is rated at 400-430 FPS
Crosman has most all their BB gun/rifle manuals online. (See link below) on the Crosman home page click on the "Download a manual" at the bottom of the web page and locate your manual.