Which form is incorrect for stock checkers to use when issuing ammunition at the ASP?

DA Form 2891 is indeed the incorrect form for stock checkers to use when issuing ammunition at the ASP (Ammunition Supply Point). This form is primarily used for reporting the status of ammunition supply operations, but it does not serve as an issuance document for transferring ammunition to using units.

On the other hand, other forms like DD Form 2890, DA Form 581, and DD Form 626 are specifically designed for various aspects of ammunition management. For instance, DD Form 2890 is utilized for the transportation of ammunition, DA Form 581 is the request for issue or turn-in of ammunition, and DD Form 626 is used for inspecting vehicle shipments of ammunition. These forms ensure that proper records are maintained and that the processes related to ammunition issues are conducted in compliance with military regulations.

In summary, the correct choice highlights the importance of using the appropriate forms tailored for specific tasks in ammunition handling and management.