What's the type of muzzle devices on the models with round hand guards?
CREATE TABLE table_12834315_1 (muzzle_device VARCHAR, hand_guards VARCHAR)
SELECT muzzle_device FROM table_12834315_1 WHERE hand_guards = "Round"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_12834315_1 (muzzle_device VARCHAR, hand_guards VARCHAR) Question: What's the type of muzzle devices on the models with round hand guards? [/INST] SELECT muzzle_device FROM table_12834315_1 WHERE hand_guards = "Round" </s>