My daughter has a used Tekneys that she got with no manual. When trying to shoot doubles(first time ever) she had problems with shells not feeding or hanging up on the second. Being a auto 5 and 1100 man I have no idea what the black button on the left side of the receiver is for or the button on the bottom feed. Any help would be appreciated. Also it seems to have a different thread than other berreta's for the choke, she would like a Briley Improved Mod for her 16yd. Still with all the problems she hit 32/50!