Big Kahuna Industries, Big Kahuna Industries Choosing Optics for a .50 BMG Upper Start With Ruggedness, Not Marketing Language The first job of a .50 BMG optic is not to look impressive on a spec sheet. It is to stay together, hold zero, and survive repeated recoil. That means the... 50 BMG 50 BMG Rated Optic Big Kahuna Guns Raptor 50 Upper Rugged Scope Jul 12, 2026