One small case covers almost every caliber a precinct has in it"s arsenal. NEVER waste ammunition again! Train with this laser untill you have it down pat, THEN hit the range for live fire. Lower your ammo bills, lower your insurance bills, raise your level of skill with this little black case. Train safely indoors with out the loud noise, without hearing or eye protection in REAL TIME without the damaging bullet holes! A must have in today"s economy