U.S. Ordnance, a weapons manufacturer based at Tahoe Reno Industrial Center, last week broke ground on a 22,000-square-foot expansion to house its quality assurance and assembly divisions.U.S. Ordnance Chief Executive Officer Curtis Debord says the expansion is one facet of a company-wide lean manufacturing program implemented several years ago that has allowed U.S. Ordnance to triple its manufacturing capabilities. The company makes the M2 50-caliber heavy machine gun and the M-60 7.62 millimeter belt-fed machine gun.U.S. Ordnance also purchased a 14,000-square-foot building about 300 yards from its headquarters at Sydney Drive to store about a million pounds of steel and …