.177 Cal., Single Shot Barrel Break, Detachable Magazine, w/3x9-50mm Scope, 1250 fps lead/1650 fps PBA. Firearm Status. Did You Know ? From CFC.... An airgun is a firearm if it was designed to have BOTH a high muzzle velocity (greater than 500 fps) AND a high muzzle energy (greater than 4.2 foot pounds). An interesting site for doing calculations is........ www.pyramydair.com/site /articles/formulas/ BUT it's not what you use rather what can be used.
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