It should make weight. I'm going to weight mine tomorrow, when I can grab a scale from work.
Given the CO weight limite of 35oz, my gun should be slightly under it. USPSA has the P09 listed as 31oz, the Burris FF3 is listed as 1.5oz with a picatinny rail plate adapter, which will be very close to the dovetail adapter. Don't know if that includes the battery or if Burris had it weighted empty. Either way, with the rear sight removed, it could take place of the battery's weight. Even with the 33oz initial weight rumor, it was going to skirt just by it.