I was at the range today with a friend who just got a new AR with a free floated barrel. After sighting it in at 25yds, we moved to longer ranges and finally to the 200M range. At 200M, his POI was about 3ft above POA. Being somewhat familiar with the trajectory of 5.56, I knew that couldn't be right. Then I noticed the way he was shooting, he had the barrel (not the handguard) resting on a shooting rest. I reasoned this was totally defeating the purpose of his FF tube and torquing the barrel up. He adjusted his shooting rest to be under the handguard, and his shots started falling where they should have been. This got me thinking though, all my ARs have standard A2 handguards. When I shoot from a rest with the rifle resting on the handguards, what stops the barrel from torquing up? Is it the stiffness of the handguards, and the fact that they're attached at the delta ring and front end of the barrel? Does it torque the barrel, but just not nearly as much as an improperly used free floated one? I suppose it might be important when using A2 handguards and a rest to make sure the rest is as close to the delta ring as possible?