I have a straight pull shotgun that has a small brass coloured bump on the end of the barrel and it works fine But I wanted more so put on a cheap red dot style like this one https://www.ebay.com.au/itm/Tactical-El ... cnXMrT4QBw
Problem was it would not aim low enough as I cant get the rail low enough, so was thinking what other styles other people like and was thinking on a lazer red dot or something.