Factory blanks are occasionally accessible but hard to find. I don’t see blank ammo stated in any with the countrywide catalogs that listing Are living ammo. Now after which Outdated Western Scrounger has some but not in each individual caliber. Navy Arms sells five in 1 blanks but They can https://strapweaponshop.com/product/triple-r-munitions-223-5-56-nato-blanks-100-rounds/