New Made Item: A fine replica showing the correct bag shaped construction of the originals. Complete with all finger grooves and long attachment bolt. Although originally issued and intended for the m-1921/1927 and 1928 TSMG Series these can also be used with the WW2 M1 and M1A1 side cocking Thompson SMG series.
Note: Mounting slot is 1/2″ inch wide not 3/4″ (check your Thompson, especially if it is a West Hurley model or new made commercial version by Kahr Arms.)