What is the muzzle device with a 1:7 barrel twist and a stock 4th generation?
CREATE TABLE table_name_47 (
    muzzle_device VARCHAR,
    barrel_twist VARCHAR,
    stock VARCHAR
)
SELECT muzzle_device FROM table_name_47 WHERE barrel_twist = "1:7" AND stock = "4th generation"
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: What is the muzzle device with a 1:7 barrel twist and a stock 4th generation? ### Input: CREATE TABLE table_name_47 (
    muzzle_device VARCHAR,
    barrel_twist VARCHAR,
    stock VARCHAR
) ### Response: SELECT muzzle_device FROM table_name_47 WHERE barrel_twist = "1:7" AND stock = "4th generation"