Big fan of Rifle sights on shotguns shooting slugs. My M500 tactical gun has Williams Rifle Sights and the green FOis hard to miss in direct sunlight. It's hard to miss anytime really. If you are shooting a night with a gun mounted light the green FO is easy to see as well.
On my Browning A5 which I have set up as a slug gun I have two barrels, a smoothbore Miroku Buck Special Barrel and I was able to drift the existing Front Sight out and replace it with a Williams Green FO. The other barrel is a Hastings Rifled Barrel with the same kind of sights except I have not been able to get the front sight out of that barrel to save my life. IF I ever do it'll get replaced with another Williams Green FO.
I use the Buck Special Barrel primarily for 3 gun and Front sight classes where I will be shooting the majority of Birdshot, with some buckshot and slugs and that barrel shoots all three well, but the sights help with accuracy. So much better than a simple bead.
I had thought about making an adapter for the rear sight on the Hastings barrel to mount a Burris Fastfire III but haven't gotten around to it yet.
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