Big Kahuna Industries, Tim Francisco 50 BMG AR-15 Upper – The Raptor 50 from Big Kahuna Guns The AR-15 50 BMG Upper: Engineering .50 BMG Power into the Standard AR-15 Platform The .50 BMG delivers legendary power and extreme long-range capability. The Raptor 50 from Big Kahuna Guns brings tha... Jun 12, 2026