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Continue to ChatGSG THREAD ADAPTER .22 CAL 1/2X28 TO 1/2X20 https://www.deltamike.co.nz/product/gsg-thread-adapter-22-cal-1-2x28-to-1-2x20/
GSG THREAD ADAPTER .22 CAL 1/2X28 TO 1/2X20 https://www.deltamike.co.nz/product/gsg-thread-adapter-22-cal-1-2x28-to-1-2x20/