I have a Mossberg International Silver in 20ga made by Khan in 20 ga. I am trying to locate aftermarket chokes. I had Brileys send me a Beretta choke in 20 ga but the threads were not correct. Brileys didnt seem to want to help me and requested to send it back for a refund, which i did. Truelock web site says they interchange with Huglu's, My question is, has any one got an idea which one and if so what the threads are. thanks in advance