The new KOAH Roller series has amazing power with little recoil in a small package. The Roller gun utilizes three advantages, Large power in small more mobile size, next to no recoil and only one or two bands to load. On a standard power band there is approximately 25-35 percent power loss due the natural oval shape of the band and the wishbone. On a roller speargun that waste is reduced to about 5-10 percent with the band starting on the bottom of the stock. This allows you to utilize nearly the entire top of the stock for the power stroke of the power band. All this means is a lot of power in a shoerter gun for example a 52" Roller would rival a three banded 60" standard speargun and a 110cm roller would go head to head with a 130cm standard Euro.
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