Thanks everyone for the feedback, I ended up getting a Streamlight Mag Tube Rail https://www.amazon.com/Streamlight-Mag-Tube-Rail-SuperTac/dp/B0028LXG5A and repurposing one of my TLR1s, the iProtec with a cheap Amazon Gearlight flashlight just seemed like a bad idea. Only $20 for the Streamlight rail, so if I don’t like it, I’ll probably try the trirail forearm from Mossberg that u/ILordINikon311 posted.

Thanks for the heads up. Streamlight has similar mounts, or at least these are being advertised as Streamlight, I've yet to find them on Streamlight's site.