Two new tenants at the Port of Lewiston’s Incubator Building recently tripled the facility’s occupancy — from one business to three. Aluminum firearms parts, such as scope bases and rings, are manufactured on computer numerically controlled machines at Pure-Precision, a company owned by Charlie Bell. Pure-Precision joins Hells Canyon Armory, which specializes in gun barrels, at the incubator at 1708 Sixth Ave N. in Lewiston. Bell’s business employs his wife and another staff member, subcontracting with other companies that do similar work for smaller runs on parts for agricultural, automotive and aerospace businesses. “I make pretty much what anybody wants...