28 gauge laser boresighter

[Meleagris gallopavo]

Can't seem to find a 28 gauge boresighter anywhere.  Looking for the kind that fits in the chamber.  Any help would be greatly appreciated.


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[bwhana]

I couldn't find a brass model for 28ga like I use for 20 ga either. This is one of the few that includes a 28 ga arbor. https://bsaoptics.com/product/bore-sight-kit-arbors/