COLT SMG UPPER NO FURTHER A MYSTERY

Colt Firearms Colt's Manufacturing Firm, formerly Colt's Patent Firearms Production Enterprise is undoubtedly an American firearms company, Established in 1855 by Samuel Colt.  It's the successor Company to Colt's earlier firearms-producing efforts, which began in 1836. Colt is recognized for the engineering, manufacturing, and internet marke