PolyRail 11mm Pro Blocks Rail for Crosman 2240 Ratbuster This product data sheet is originally written in English. THE ORIGINAL- Tried and tested design The PolyRail is a sturdier, and faster alternative to the Crosman Pro Blocks. It installs in a couple of minutes with our included instruction video and allows you to mount a scope or red dot to your Crosman 2240 via the 11mm dovetail rail. The rail fits onto a standard Crosman 2240. Once installed, the PolyRail is kept in place by the force applied by the Crosman 2240 barrel band. This allows for a really sturdy scope rail to mount your chosen 11mm optic. The scope rail is also compatible with our "GRAVmag 5P" magazine, which can be found by searching the store for "crosman gravmag 5p".