Crosman makes about 50 different '''RIFLES''' you need to state the model you are asking about.

See the link below for Crosman rifle owners manuals

Crosman corp has schematics and some parts available on-line through their home page. Click on the link below and when it opens, at the bottom of the page, click on "Download a manual." There you will find the information you are looking for.

Crosman doesn't modify existing models. But you can order a custom model made for you. See the link below.

Also there are several airgun smiths that do modify existing airguns. They do all kinds of modifications and repairs.

See the link below.

CROSMAN 2100

You can find CROSMAN Parts and manuals at ( see the link below)

This should give you a diagram on how to dissamble a crosman 2100.

Adam Crosman is 179 cm.