I was talking to my roommates today after one of them brought home a new Sig 716 and Glock 17 Gen4, saying he was wanting to get into 3 gun after he heard me mention I was wanting to pick it up by next spring. I was planning on building up everything to start with but am clueless on where to begin. I know I need a semi auto rifle, semi auto shotgun and a handgun but would really like recommendations. As a rifle, I planned on picking up a Tavor that comes out later this month and was wondering if it could double up? If not, I could always go for an AR again

and also, would a Glock 19 work okay? The full sized have never seemed to fit me well compared to the compact ones, although I have never shot a Gen4 so that may help with the back straps changing. Any help and advice would be great! By the way, the place we were looking at is at the OKC Gun Club