what are all the barrel lengths whith the name  ar-15a3 competition hbar
CREATE TABLE table_12834315_2 (barrel_length VARCHAR, name VARCHAR)
SELECT barrel_length FROM table_12834315_2 WHERE name = "AR-15A3 Competition HBAR"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_12834315_2 (barrel_length VARCHAR, name VARCHAR) Question: what are all the barrel lengths whith the name  ar-15a3 competition hbar [/INST] SELECT barrel_length FROM table_12834315_2 WHERE name = "AR-15A3 Competition HBAR" </s>