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UMP and SB Pic rail adaptors

Home of the 3d printed UMP, UMforthePoors 5.5MiB Released April 30, 2022, 4:02 PM 0.010LBC 1 Reposts
Remix of MiddletonMade's pic rail adaptor and my UMP stock or brace mount. Also a Remix of MM adaptor and BrokenBulletz S&B brace or factory UMP stock adaptor. Included all files for UMP stock or brace.