Kemisk metal thansenMetastatic cancer is cancer that spreads from its site of origin to another part of the body. Learn how cancer spreads, possible symptoms, common sites where cancer spreads, and how to find out about treatment options.Sigmatek plc softwareRare Breed Triggers has been marketing their "Forced-Reset Trigger" (FRT) that allows a person to fire an AR-15 very quickly, but with the trigger finger firing one shot per pull of the trigger. BATFE sent a letter to Rare Breed saying they consider the trigger to be a machine gun.