KNIGHTS ARMAMENT COMPANY SUPPRESSOR FOR THE HECKLER & KOCH MP5 - KAC NAVY 9mm SUBMACHINE GUN SUPPRESSOR....WE WERE FORTUNATE TO RECEIVE A PART OF OUR KAC ORDER (AFTER A LONG WAIT!) KAC ITEMS ARE VERY HARD TO GET AS MOST OF THEIR PRODUCTION GOES OUT TO U.S. MILITARY ... THE KAC NAVY IS A THREAD-ON SUPPRESSOR, MANUFACTURED AT THE REQUEST OF THE U.S. NAVY SPECIAL OPERATIONS GROUP (SEALS), AS THEY WANTED A LIGHT WEIGHT AND NON-QUICK DISCONNECT MOUNTING SYSTME TO WORK WITH THE "N" OR NAVY MODELS OF THE HK MP5-TYPE FIREARMS FROM H&K... THE KAC NAVY IS FOR USE ON 1/2x32 TPI NAVY BBL...IF YOU WANT THE MOST COVETED OF ALL MP5 SUPPRESSORS, THIS IS IT EMAIL FOR PRICE