How was it launch what was its range .What type of grenades were it able to fire.
i know it fired pineapples and im pretty sure there were grenades specialized for rifle firing, im not 100% on this but i would say they could probly get about 150yds out of them, of course these grenades were never fires straight like a bullet, they were instead fired skywards with the gun on an angle so im sure that reduced the distance
Here is a site with some info and pics. Hope this helps a little. Click on pics for more info.
http://www.inert-ord.net/usa03a/usarg/index.html
The people who requested information and is ansewered correctly should be decent enough at list to post a thanks. to search and find information takes time, to write a “thanks” take not even 5 seconds.