All fun stuff, but one element of this bust concerns me: <Given that the house was caught on film, police investigated further and eventually got a search warr

All fun stuff, but one element of this bust concerns me: <Given that the house was caught on film, police investigated further and eventually got a search warrant for the property ... (ATF and police) used a “breaching technique which caused the front door to be removed from the residence,” along with using various diversion devices within the house.> This implies that they were granted a no-knock warrant. Historically, those were allowed only when there was a risk of evidence being destroyed between entry and apprehension (e.g. drugs, records, etc.) or in cases of live captives. Since guns were the objects of the warrant, and they can't be destroyed easily, why a no-knock warrant?