it's just a different type of rifling. it is far easier to get polygonal rifling spotless when cleaning than standard rifling, and there aren't sharp crevices that crud can hide in.
as to the claim that glock's polygonal rifling produces better muzzle velocity, it's been tested at maybe only 10fps faster at the most (it does seal in gases slightly better than standard rifling, but the results are minimal).
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as to the claim that glock's polygonal rifling produces better muzzle velocity, it's been tested at maybe only 10fps faster at the most (it does seal in gases slightly better than standard rifling, but the results are minimal).
