Tuning the Crosman 2240 Trigger
The stock trigger on the 2240 leaves a lot to be desired, the pull is rough and quite heavy. As a matter of fact, the most desirable aspect of the trigger is that it is modular and it is easy to take apart and correct. One of the first tasks I perform when building a modified gun is to rework the trigger; the steps are to a) remove some material from the shelf and polish the sear, b) then install some shims on either side of the trigger components to remove the side to side shifting. The shims are made of small stainless washers that have the centers filed out to match the pins in the trigger. You can also file down the bosses that the pins fit into to smooth them out. They just fit over the pins, but you will need to do some filing to get the fit right. The washers used are .120"ID .250"OD and .020" thick. I learned how to do these modifications from the instructions posted online by Brian Maconaughey, and wish to acknowledge the fact that I am not the originator of these modifications.

Fig 30

Remove the grips and remove the safety spring and ball bearing that sit in the small groove along the side of the frame by turning the frame over and holding it over your open plam. Take out the trigger spring which is connected from a post on the grip frame to the sear, then remove the two screws which hold the cover on over the trigger assembly. Once the screws are out the plate is lifted off exposing the trigger.

Fig 31

The parts of the trigger include the trigger, sear, trigger spring, two small post, a shim (washer), the safety with the small spring and ball bearing, the cover plate and two screws. It is really simplistic and easy to work on. I typically use the lid from a plastic shoe box as my work surface to keep from losing anything. If you drop the tiny safety ball bearing you will be on your hands and knees searching for a long time!

Now that the trigger module is disassembled it is time to start work on cleaning up the results of the cheaply made mass produced parts.