A Waterbury gun shop is moving ahead with plans to build what it is calling the largest indoor shooting range in the state.

The Waterbury Record reports Parro's Gun Shop plans to build an 18,000-square-foot building next to the current shop on Route 2.

The shop's owner says development over the years has meant open land dedicated for shooting has become scarce.

The barn-like building will include retail space and a 10-stall indoor shooting range and training center.

It is expected to open later next fall.