A:
Stoeger 2000 Semi Auto & P-350 Pump: Interchanges with Carlson's Beretta/Benelli threads
Stoeger 2000 Condor (O/U): Interchanges with Carlson's Winchester style threads
Stoeger STF 3000: Interchanges with Carlson's Wiinchester, Mossberg 500 and Browning Invector style threads
Stoeger Luger (O/U): Interchanges with Carlson's American Arms style threads
Stoeger Uplander (Side by Side): Interchanges with Carlson's Winchester style threads