I was going to make the same comparison. I am torn. Barrett just came out with the Big Shot, which is the first Barrett that I could afford. Maadi-Griffin makes a "non-FFL" kit that I could afford, and there is a guy here locally who does M2 HB semi conversions, although Oregon is a machine gun friendly state, and for about $3000 more, I could just buy a NIB pre '86 transferable M2 HB and shoot it semi in competitions. Same guy has ball, tracer, AP, and incindiery for $1.20 a round, linked and delivered. He invited me out to his house to shoot one of his conversions in his back yard. Really nice people in your sport.