With what we know about Spires, it makes sense that the right gun is the captains gun since you really can't neglect the hull even for a moment. At medium range I had no problem planting my spire or throwing it in reverse and laying shot after shot into the enemy. You can make some really nasty builds if you think of all the double light heavy weapon combos available. I've only begun scheming, Polaris are probably way ahead of everyone and I know Howard has been getting ready for this for Months.