Don't be skerred that President Barack Obama will be putting a permanent safety lock on Americans' right to bear arms. You're just being paranoid and probably a little on edge. Relieve some of that pent-up anxiety at Caswells, a small-ish, 21-year-old gun range tucked inside a warehouse area near Stapley and Baseline roads in Mesa. Eleven shooting lanes, which cost $15 per person per lane, are available for rent for both the grizzled gunsmith and the firearms novice. Not packing a piece? No problem, because you can rent black-as-night Glocks that are also available for purchase through the range's "Try Before You Buy" program. Queues do tend to get long on the weekends, so you may want to fire away on a weeknight. Ladies Day, which entitles women to free range time and gun rentals, takes place Tuesdays and Fridays.