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_4 (barrel_twist VARCHAR, colt_model_no VARCHAR)
### Question:
Name the barrel twist for colt model mt6400
### Answer:
SELECT barrel_twist FROM table_12834315_4 WHERE colt_model_no = "MT6400"