Troy Industries is an American firearms manufacturer and accessories company based in West Springfield, Massachusetts. The company serves military, law enforcement, and civilian markets. Troy produces AR-15 and AR-10 platform rifles including the Troy A4 and M7A1 PDW. Rifles are built with aerospace-grade aluminum receivers and chrome-lined barrels. Many models include folding stock mechanisms and proprietary lightweight handguards. Troy is also well known for its BattleRail handguards and BattleSights. The folding backup iron sights are used by professionals and have become a reference standard for durability in that category.