text: Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
  ### Context:
  CREATE TABLE table_12834315_2 (barrel_length VARCHAR, name VARCHAR)
  ### Question:
  what are all the barrel lengths whith the name  ar-15a3 competition hbar
  ### Answer:
  SELECT barrel_length FROM table_12834315_2 WHERE name = "AR-15A3 Competition HBAR"