Quick, think of the first thing that comes to mind when I say "riot shotgun"!
Does it have a brass buttplate? A tangent rear sight? Is it a single-shot weapon? Does it use a shotshell smaller than 28ga?
No? Well, I guess you have a different notion of riot gear than the Indian military. Huh.
Today I've got a video on the Indian answer to the mass-issue riot gun, a SMLE rifle with the magazine well plugged and the barrel bored out to .410. They are pretty neat, and this one's in really nice shape.
It seems that the bored-out version like mine that use American 2.5" shells are quite a bit more common here than the original brass-case version here in the States. They're not too difficult to find if you keep your eyes open online, and not that expensive (yet). Definitely a neat side item for the Enfield collector, or just someone like me who enjoys "different" guns.