if the grooves for the adapter screws compromise the barrel strength on a sporting barrel
Why would they? This ain't goin' to war and I doubt you'll really overuse it... I've never heard of one going to pieces whilst in use.
Originally Posted by Tom Doniphon
That is why when the Military converted some Model 12 riot guns to trench guns they had to use a sleeve on the muzzle end of the barrel to make the bayonet adaptor fit properly.