A bud I know worked for DoD and went to Army Ammunition plants to determine compliance to gauging.
Army Ammunition plants are run by Contractors. These are Government Owned, Contractor Operated facilities. The contractors act as though they own the plant, and the Government! However one deal is, to keep the plant and the workers in prime condition, if the plant meets military needs, than the Contractor can operate the plant for its profit. That explains why we have seen new primed LC 5.56 cases for sale. The stuff did come off the LC production lines, but in a time when the Contractor had met all the Government needs first.
The US no longer has the industrial capacity to produce enough ammunition, firearms, equipment to support our military in minor bush wars. During the Infinity Wars in Iraq and Afghanistan the US military contracted with South Korea for small arms ammunition. Today, the US is buying 20mm munitions and artillery from S Korea because the US industrial capacity is insufficient to support the war in Ukraine.
The Greatest Generation remembered their severe shortages in the ramp up in WW2. And that was a time when the US was a manufacturing behemoth. The Greatest Generation built surge capacity ammunition plants for just such problems as we have today. I toured the Lone Star Ammunition plant in the early 1980's, this was a small arms plant built, maintained, to be turned on when surge capacity was needed for a war. All these surge plants were sold off in the Clinton administration to Democratically well connected realtors and plutocrats who made obscene profits picking up Government property for a song. Our leaders off shored our manufacturing capability and our industrial base. So, if LC can not meet military needs, they sure are not going to have excess to sell to civilians.