This video details how to build a functional 50 BMG rifle on a budget, primarily by utilizing an AR-15 lower receiver with a specialized Big Kahuna 50 BMG upper. The build can be achieved for approximately $1,800, excluding optics and bipod, making it significantly more accessible than traditional high-end 50 BMG platforms. Key steps involve replacing the AR-15 hammer with an upgraded component to accommodate the larger caliber and ensuring compatibility with the AR-15 lower.
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