Take that, you Hun!"
Difference between “trench” gun vs “riot” gun
Is that the trench gun used a ventilated hand guard over the barrel and a bayonet mount
Riot guns were short (20 inch) barrel shotguns
On a related note, if you haven’t seen Peter Jackson’s ‘They Shall Not Grow Old’, get off your butt and do so.
https://en.m.wikipedia.org/wiki/They_Shall_Not_Grow_Old
Stay thru the credits for a worthwhile interview with Jackson on the making of the film. See if the theater doesn’t crack up on his comment on personally-owned artillery.
There is a great episode on this and lots of other WWI guns by C&Rsenal. You can watch it on YouTube. Othias and Mae take an in depth look at each gun’s history and development as well as having a shooting session and assessment of the gun’s strengths and weaknesses.
I’m the proud owner of a Winchester 1897 (I suppose along with millions of other people). It was my dad’s primary gun for duck, pheasant, and grouse hunting when I was growing up in the 50s and 60s. I assumed that he was a lifetime hunter, but a few years back when I cleaned out the hidden closet where he stored it , the 1897 was covered with a newspaper featuring Henry Kissinger on the front page, wearing bell bottom pants, and mutton chop sideburns.