Quote Originally Posted by paulosantos View Post
With a Non-FreeFloat Handguard, the front sight is mounted on the barrel, so the shift will be practically nil when using a sling or leaning it on something. Where you will have the shift with the Non-FreeFloat handguards is when you use an optic and you put pressure on the barrel by using a sling or leaning it on something. From 0-100 yards the shift will be minimal at best, unless you crank on the sling for whatever reason.

With a Free-Float Handguard, the only time you will have a shift is when you mount a front BUIS on the Rail.
I wouldn't say that having a barrel mounted front sight makes the POI shift proctically nil. When changing from off hand to slinging up tight to supported with non free floated skinny barrel AR15s and skinny barrel M14s, there is definitely a significant POI change. There is a lot going on there other than changing the direction the barrel is pointing. Whether or not the shift on a persons weapon from one position to another is significant in a match/personal defense/combat situation is for them to find out.
Dustin.