Hey Ringo kid:
Sorry to tell you, but Singer did not make an M1 Carbine or a Garand.
Carbines:
Rockola, Chicago, IL; Irwin Pedersen, Grand Rapids, MI. (there contract was taken over by Saginaw Steering Gear, GM); Inland Mfg, GM, Dayton, OH; Winchester Repeating Arms, New Haven Conn.;, Underwood-Elliott-Fisher, Hartford, Conn.; Quality Hardware & Machine, Chicago, IL; National Postal Meter Co., Rochester, NY (NPM changed there name to Commercial Controls in April 1944 and 239 Carbines were made using that name) Try finding one of those

; Standard Products, Port Clinton, OH, Saginaw Steering Gear, GM, two plants: Grand Rapids, MI. and Saginaw, MI; IBM, Poughkeepsie, NY.