Perpster, I have not, but my gut reaction is there'd be no change.
Back in the days of wood stocked infantry rifles and iron infantrymen, the SMLE used by the British had one set of sights, but fixing the bayonet changed the zero predictably. Brit soldiers were trained to adjust their hold.
The SMLE has lots more barrel metal of smaller diameter than Mossberg's pipes.
The Springfield 03 I took my first buck with was a low numbered job that had been through WWI. When I checked the zero the first time we found the battle sights were pretty much on at 125 yards instead of the 375 yard standard.
My coach, who had carried a Garand through Europe with the 29th Division, opined that a previous user had bayoneted something or someone hard enough to bend the barrel.
A couple things about bayonets on shotguns.....
First, while these were used in the past, I don't see any in the pics from our current difficulties. There's probably a good reason there. I don't see mounted on M4s either.
Second, considering how obsessed some folks are about getting the shortest legal shotgun possible, why are some of these same folks wanting to add 8-10" to the OA length?
Third, I'd wager the usual flagon of mead NONE of the folks who want bayonets have ever used one in a crisis.
Said coach above when I asked flat out if he had ever bayoneted anyone said he had worked very, very hard at not letting them get that close. I dropped the matter.
If the muzzle is pointed at the perp anyway, why not shoot? If your shotgun is empty, you've the options of ramming the muzzle into his COM or buttstroking the SOB.
Better yet, learn to not run it dry.....