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_1 (colt_model_no VARCHAR, name VARCHAR, case_deflector VARCHAR, bayonet_lug VARCHAR, stock VARCHAR)
### Question:
What are the Colt model numbers of the models named GAU-5A/A, with no bayonet lug, no case deflector and stock of 2nd generation? 
### Answer:
SELECT colt_model_no FROM table_12834315_1 WHERE bayonet_lug = "No" AND stock = "2nd Generation" AND case_deflector = "No" AND name = "GAU-5A/A"