BreakdownThe MagnetoSpeed Sporter chronograph was designed to be used on barrels from 1/2 inch up to 1 inch in diameter. It can also accommodate muzzle brakes and flash hiders up to 2.7 inches in length. Ideal for contoured rifle barrels (sporter barrels) and long-barreled revolvers. For center-fire rifles and revolvers only, not compatible with airguns or rim-fire.
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