I read that US has stockpiled 6K LRASM.
Where on earth did you read such bullshit? You're off by an order of magnitude. LRASM Lot 1 entered production in 2017. Here are the official procurement documents from and which lay out the numbers acquired every fiscal year. Go through them and add them all up for a grand total of 1,321—as of FY2028. Right now as of FY2025, the total is a measly 577. And LRASM production rates only scheduled to hit 240 per year as of 2026, after nine years of ramping up.