Manufacturing facility blanks are occasionally readily available but hard to find. I don’t see blank ammo stated in almost any from the nationwide catalogs that list Dwell ammo. Now after which Aged Western Scrounger has several but not in every single caliber. Navy Arms sells five in one blanks but https://strapweaponshop.com/product/triple-r-munitions-223-5-56-nato-blanks-100-rounds/