RE: left handed semi-auto
Don't quote me on this, but I think that both Browning BAR's and Remington made/make rifles in left-hand. As or the shotgun, the only I know for sure is the Rem 1100, I have one in 20ga. One thing to remember, make sure that you plan on keeping it. It can be very hard to get rid of. I'm left-handed and bought a left-hand bolt a few years ago and it didn't fit my needs(impulse buy)lol. I took a "beating" on it.