Originally Posted by
vicious_cb
Thats what free floating handguards are for.
Goes beyond that - floating the handguard just restricts that cantilevered mass to only one point (that has a considerable amount of material at the barrel nut-upper receiver mating point) to affect harmonic oscillations of the rifle - it's a LOT better than having two points, but just free floating a barrel doesn't disconnect either piece from that vibration equation as the force of an explosion gets channeled out a chiral opening in a tube with a movable copper jacketed lead seal - stuff is still going to deflect as that much force is getting channeled places, no matter where or how it's under tension from different stuff, just changes exactly which direction and how much it's going to move.
That sling has to mount to something, even if it's a FF handguard it's going to affect POI because that force is still actually being imparted onto the barrel, just at a different spot, at a different angle for the force vector, which in this case just makes for a much more consistent (and therefore predictable) POI shift.
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