ive seen the fobus and one or two others, one in leather, designed to fit the mkIII with and optic. Ive got a simple holster for mine that I never use and its a dust collector in my closet. i do have a micro red dot on mine now and did look up holsters for it and almost bought one until I remembered i never used the other holster anyway, lol. well its stricktly a target pistol i use at the range and i never carry it. I have 2 ccw pistols that i have 3 or 4 holsters for each. If i still hunted id probubly carry one of those. Though there was a time id of carried the mkIII as i had a MKII and a MKI that i carried sometimes when out in the woods hunting.