A special case of metric-affine gauge theory of gravity (MAG) is equivalent to general relativity with Proca matter as source. We study in detail a corresponding numeric solution of the Reissner-Nordstr"om type. It is static, spherically symmetric, and of electric type. In particular, this solution has no horizon, so it has a naked singularity as its origin.
@article{arxiv.gr-qc/9910042,
title = {A numeric solution for metric-affine gravity and Einstein's gravitational theory with Proca matter},
author = {Marc Toussaint},
journal= {arXiv preprint arXiv:gr-qc/9910042},
year = {2015}
}