This is version 2.0.
The Breech is the iconic part of the Nimble.
It makes changing filament a snap and allows the filament path to be fully visible when removed. It also is a very small piece of plastic and more than any other part of the Nimble it is subject to wear and tear.
This is the Breech for the Giddy, the Nimble V2, and the Sidewinder V2. It has been completely redesigned and optimised. It is now easier to open and the same for both types of V2 Nimbles.
Note: The Photo shows the body with the idler bearing and shaft inserted. That is how the spare Breech will be shipped.