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The rear of the bolt where the finger grips are is outside the frame. Apparently he pulled the bolt back and thought the rear part unscrewed. I can't figure out what some folks are thinking or if guys like that think at all.
For disassembly, first the usual - remove magazine and make sure the gun is unloaded.
Then, push in the little nub (barrel nut retainer) at the front above the barrel, and unscrew the barrel nut. The barrel guide (the sort of figure 8) can then be taken out, making sure not to lose the retainer. Pull out the recoil spring.
The barrel guide has a slot in the top. That slot fits over the front end of the recoil spring assembly and allows it to be turned 1/4 turn CCW to unlock the rear from the bolt. Then the bolt and barrel can be removed to the rear. The recoil spring assembly is then turned back 1/4 turn and removed to the front. The recoil spring assembly is a permanent assembly and should not be disassembled. The bolt can be removed from the barrel extension and the bolt head removed from the bolt body. The bolt head can be removed, but further disassembly is not recommend.
When reassembling, insert the bolt into the barrel extension by pushing the bolt head in, then turning the bolt body a bit to the right to insert the bolt body. The barrel/bolt then is inserted into the frame as one unit. Get the barrel past the bolt catch by raising it up in back, moving it forward, then pull the hammer back and slide the barrel and bolt into the receiver. When the bolt stops on the bolt catch, push the barrel forward until the bolt releases.
Now insert the recoil spring guide and lock it into the bolt, using the barrel guide. Insert the recoil spring and put the barrel nut retainer on it. Insert the barrel guide (either way). Keep everything in place and screw on the barrel nut.
Jim
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