Enhanced earned sentence credits; exemptions; certain firearm-related offenses; felony conviction during confinement. Removes any person convicted of certain felony offenses involving a firearm from eligibility for enhanced earned sentence credits and reduces enhanced earned sentence credit to zero for a person who receives a felony conviction for an offense that occurred while a prisoner in a local, state, or community correctional facility or in the custody of an employee thereof. Enhanced earned sentence credits; exemptions; certain firearm-related offenses; felony conviction during confinement. Removes any person convicted of certain felony offenses involving a firearm from eligibility for enhanced earned sentence credits and reduces enhanced earned sentence credit to zero for a person who receives a felony conviction for an offense that occurred while a prisoner in a local, state, or community correctional facility or in the custody of an employee thereof.