Few generic factory made guns are really set up for a lefty. They might have the safety on the left hand side and certainly the bottom ejection of an Ithaca make it ideal for a lefty. I would guess that most factory guns have straight stocks. But, some of the fancier shotguns are made with the stock butt curved/cantered into the shoulder. I think they call it " off-set." This makes it easier to look down the barrel without shoving your head/eye in. A left-handed gun stock in this configuration will curve to the right of the gun (looking from the top) and a right-handed gun stock will curve to the left. " Angle" is probably a better word than curve -- it' s going to be subtle. I suppose you can teach yourself to shoot any gun in any configuration, but you' re going to have to compensate in such a way that you won' t shoot in your most natural position.