661—95.8 (809,809A) Final disposition and destruction of firearms. All firearms in the possession of the division of criminal investigation criminalistics laboratory pursuant to Iowa Code section 809A.17 which are not disposed of by the procedures provided in rules 661—95.2(809,809A) through 661—95.7(809,809A) shall be destroyed. Destruction shall be accomplished by grinding and chopping at a scrap metal facility or meltdown at a suitable foundry operation. All destruction shall be supervised and conducted by the staff of the division of criminal investigation criminalistics laboratory. Documentation of the destruction of the firearms shall be made in the firearms inventory.