Possible explanation . . .
The unique parts for XCR’s are sometimes made by subcontractors. Because of material and personnel shortages, some suppliers have gone out of business or have long delays in deliveries. The last two years have been very difficult to find new quality suppliers when necessary and then get deliveries when expected.
Unfortunately, inventory systems can be off by one or two counts. What shows on a computer may not actually be in the bin. The back order on complete rifles may consume what may have been considered a spare part.
Nevertheless, good communication on the status of a pending order is always desirable.