This is known as the repeatAIR not repeater. It's the Crosman model 1008 You can find the parts diagram for all Crosman's weapons on their web page. (See the related link at the bottom of this page) then click on Rifles or Pistol manuals
Crosman does not own Marksman. Crosman made a Repeatairmodel and Marksman made a Repeater model. See the link below for the Marksman Repeater owners manual.
You can't it's not designed to be a repeater.
It was made for Western Auto by Crosman between 1966-70
The Crosman 400 is rated at 450 FPS. See the link below for the owners manual
It's a repeater. It's not semi-auto.
see the link below for the owners manual.
See the link below.
Crosman offers a service to locate repair shops that work on Crosman antiques. See the link below
Yes,I carry clips for the crosman 622 air rifle. I can be reached @ brdjsk73@gmail.com
See the link below for the parts manual.
See the Crosman link below for the diagram.