Hi Everyone, I don't know much at all about ARs so I thought I would ask you Guys. I have a Stag arms left hand 6L.
I would like to get a 300 black out upper for it . Will a right hand upper work and what length gas block? I would really like to find a left hand upper in 300BO but I'm thinking that would be much harder to find. Thanks for you time everyone.

Did a little digging it seems the only thing I would have to change is the barrel . Looks like the same barrel for right or left hand receiver. Probably handle better off hand then the 24inch heavy varmint barrel.

yes you can swap barrels and have a 300bo. if you want to have two dedicated uppers you could just drop a 300bo right hand on that lower. or find(good luck right now) a LH upper reciever and LH bcg.

stag has recievers in stock 114.00 add a barrel, gas block and tube, your choice of hand guard and then use the BCG you have.