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This is a 3D printable bushing for the 7/8'' ID cups, 1.05''OD Solvent Trap Jig with a bore of .39". It will all you to drill a proper 22lr port into the cups.
LBRY Tags: 3d printed; art; guns; atf; survival
LBRY Tags: 3d printed; art; guns; atf; survival