A 3D-printable jig for applying serial identification to Form 1 tags on FTN.5 and FTN.6 firearm projects is now available. The multi-part layout uses a reversible guide, a fitted tag holder with locating pins, and a full set of alignment spacers.

Print-ready models, adjustable design files, and supporting documentation covering parts and basic notes are included, with options to adapt stamp sizes and tag outlines.