Factory blanks are sometimes out there but hard to find. I don’t see blank ammo outlined in almost any on the nationwide catalogs that checklist Reside ammo. Now then Old Western Scrounger has some although not in each and every caliber. Navy Arms sells 5 in one blanks but they https://strapweaponshop.com/product/triple-r-munitions-223-5-56-nato-blanks-100-rounds/