Barrel locking lug fits into a cast profile hole.
Rear sight disassembly, remove a clip…
Not a ball bearing detent, a half round pin detent. Neat.
All done! Reassembly should be the reverse, will post more if any surprises come up.
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All content, pictures and text, at copyright Nicholas Carter and Derrick Kortvejesi respectively, 2008-2011 and on through time until we run out of pellets.