If you are using a sling to shoot with

by bj , Friday, April 24, 2015, 19:43 (3505 days ago) @ rob

as in Highpower competition, then you need a free float handguard. The sling will change point of impact so unless your form is very consistent the float tube will eliminate that variable. They are trickier to install than the simple tube handguards because they have to index to keep the plastic pieces on straight and the sling swivel in the right place, and you have to get the length just right so the plastic pieces will fit properly.

The downside to all of this is that the sling swivels can break off the front of the float tubes.

It makes sense that a bipod would alter point of impact too but I don't know by how much.