Bolt Disassembly
1. Remove each gas ring (starting with the rear one) by hooking the ring's gap and lifting the end of the ring up and out of the groove. Then spin it off. Be sure not to pull the rings' ends straight apart -- twist them open.
2. Remove the extractor from the bolt by pushing its retaining pin out and lifting off the extractor.
3. Remove the ejector by driving out its retaining pin with a punch and remove the ejector and spring from the front of the bolt. The spring will be under pressure, so make sure it doesn't fly across the room.
Bolt Assembly
1. Install the gas rings onto the bolt by winding them on from the rear of the bolt. Offset the gaps in the rings.
2. Install ejector spring and ejector and pin in place.
3. Install extractor with spring and pin into place.