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MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.

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sorry, no. we will not be releasing an STL of the breech at this time. You can buy a spare breech form our store at https://zesty.tech/products/breech-block-1-75-mm