The M3A1 tool is designed to perform take down of the bolt. Use as shown in the pic. Push forward on the op rod to fully engage the tool and then lift the handle of the tool.
When reassembling, you can use the tool the same way to compress the ejector spring. Putting a dab of grease on the extractor detent will ease installation. A plastic faced hammer is handy to tap the ejector into place.
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