OMG ponys! and it’s gmod! How did you made those outfits?
I used the Equestrian Guardsmare uniforms from Deviantart, simply just removed the armor using the Submaterial tool with the Invisible material (which can be found on the Gmod Workshop), and bonemerged the uniforms.
The Brodie Helmet is from a WW2 helmet pack somewhere in the Gmod Workshop, which I cannot remember at this time. The Helmet is not bonemerged - I physgunned it into place.