Military Stores -- We're BOYCOTTING Soulja Boy

A system of stores run by the United States Department of Defense will NOT be stocking Soulja Boy's upcoming album -- so long as it contains the rapper's army-bashing song lyrics.

LTC Thomas Shrader from the Army and Air Force Exchange Service -- an agency run by the USDOD -- tells TMZ, Soulja's "Respect My Hustle" will have no place on the shelves of its 3,100 facilities ... whose MILLIONS in profits go to benefit armed services programs every year.

As we previously reported, the outrage is all over the rapper's new song "Let's Be Real" -- in which Soulja raps, "F**k the FBI and the army troops." Soulja has since apologized.

Shrader tells TMZ, Soulja's lyrics "are unacceptable and not the kind of thing we would want to market.”