31311711self-loadingPT2026-03-30 20:23:59BT31301396operational attributes for firearmsPTNT31333694automaticPTNT31333695semiautomaticPTNT31333698blow-forward actionPTNT31333703blowback actionPTNT31333709gas-operatedPTNT31333710recoil-operatedPT