I have an AR-V and would like to have a spare firing pin and spring to replace mine when it finally breaks. I am shooting IPSC and training frequently, so I assume it is a matter of time. Since I live in Brazil, getting a spare from palmetto when it breaks will actually take a long time, so I would like to get one before hand. If I can find an alternate already available in the local market, even better, but I need to know what would be compatible… Anyone has experience replacing these by alternates?