Dummy 13 SpecOps Helmet - No Head
I tried the fabulous SpecOps helmets by Tpogle2017 and the only complaint was that the head didn't match up with the neck of my Dummy. So... with my TinkerCAD (cough) skills, I removed the head.
Regretfully, V2's eyeglasses ended up being too thin in TinkerCAD, so I just removed them.
This STL is at 100% of the original Dummy 13 size, so scale to your preferences. I tend to go to 150%. YMMV.