Name the barrel twist for colt model mt6400
CREATE TABLE table_12834315_4 (
    barrel_twist VARCHAR,
    colt_model_no VARCHAR
)
SELECT barrel_twist FROM table_12834315_4 WHERE colt_model_no = "MT6400"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: Name the barrel twist for colt model mt6400 ### Input: CREATE TABLE table_12834315_4 (
    barrel_twist VARCHAR,
    colt_model_no VARCHAR
) ### Response: SELECT barrel_twist FROM table_12834315_4 WHERE colt_model_no = "MT6400"