You call a
weapon "from thin air" into your waiting hand (actually, it is a real
weapon hailing from some other random location) as a free action. You don't have to see or know of a
weapon to call it-in fact, you can't ever call a specific
weapon. You just specify the type. If the specified
weapon type is one you can call at your
level, it appears. If you call a projectile
weapon, it comes loaded with a clip, box, or chamber of
ammunition, as appropriate (the
ammunition does not have an enhancement bonus, even at 10th
level and above). If you relinquish your grip on the
weapon you called for 2 or more rounds, it automatically returns to wherever it originally came from.