It was produced from 1942 to 1943 by United Defense Supply Corp. for possible issue as a replacement for the Thompson submachine gun and was used by agents of the Office of Strategic Services (OSS).
Senjata ini diprodukasi pada 1942 sampai 1943 oleh United Defense Supply Corporation untuk menggantikan senapan submesin Thompson dan digunakan oleh para agen Office of Strategic Services (OSS).