Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_8 (hand_guards VARCHAR, name VARCHAR, barrel_twist VARCHAR)

### Question ###
Name the hand guards for ar-15a2 government carbine and barrel twist of 1:9

### Accurate SQL ###

SELECT hand_guards FROM table_name_8 WHERE name = "ar-15a2 government carbine" AND barrel_twist = "1:9"