What is the neck measurement of the gun with a shoulder measurement of 10.688 (.420)?
CREATE TABLE table_name_16 (
    neck VARCHAR,
    shoulder VARCHAR
)
SELECT neck FROM table_name_16 WHERE shoulder = "10.688 (.420)"
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 neck measurement of the gun with a shoulder measurement of 10.688 (.420)? ### Input: CREATE TABLE table_name_16 (
    neck VARCHAR,
    shoulder VARCHAR
) ### Response: SELECT neck FROM table_name_16 WHERE shoulder = "10.688 (.420)"