Just got a VTAC for $555 shipped from budspolicesupply.com, and I also get a $50 mail in rebate. Took it to the range and shot some rounds at 25 yards. They were hitting low, which may have been as much due to the distance as anything else. My question is regarding the VTAC sights. Is there a way to adjust them for elevation, or do I just need to start aiming higher?