Originally Posted by
Western Metal Inc
I don't know the specifics on the AI AW338 - this is what Magnetospeed says on their webpage. I have sent them an email but will likely not hear back till Monday.
"The MagnetoSpeed Sporter chronograph kit is a stand alone chornograph designed to be used on barrels from 1/2 inch up to 1 inch in diameter. In can also accommodate muzzle brakes, flash hiders, etc, up to 2.7 inches in length. Ideal for contoured rifle barrels (sporter barrels) and long-barreled revolvers."