Vulcan 1/2 x 20 UNF Adaptor
This adaptor allows you to connect any standard 1/2 x 20 UNF moderator to your rifleshroud.
This item comes with self tightening tools (no other tools required).
Fits 177, 22, 25 and 30 caliber.
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Threads size & pitch: 14 X 20G
Female