So I planned on using a 15" PXT FFSSR handguard but it doesn't appear my YHM clamp on gas block is going to fit underneath it using my awesome picture measurement skills. So, my real question is there really a measurable accuracy difference between a clamp on and a set screw style gas block? My barrel has one dimple for a set screw gb so I can't decide if I want to just switch to the set screw style or use a shorter (11.5") handguard. I'll be shooting off a bipod if that makes a difference, personally I think the 15" will look a lot better on a 18" rifle length barrel.
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