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Phrame Installation and Modification
Installing the Phrame requires a modification to your stock breech. Instructions and dimensions are below.
The Phrame passes gas from inside the grip directly into the valve body through an o-ring sealed joint. This means you can field-strip like normal, without tools. (Always degas the marker before field-stripping.)
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To accept this passage, the breech needs a wider slot, as shown below.
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