I just remembered some early SWAT teams (1970's and early 80's) were provided from U.S.Gov't stocks the U.S. Navy dive (SEAL)knife with black coated stainless steel,saw back,black plastic sheath by Onterio. But this was not a special knife however and was given along with alot of other GI gear like camo BDU's,web gear, gas masks etc. when the SWAT teams were just being formed in each field division and gov't military surplus stock was the best place to get equipment. Gear issued now is alot more specialized and comes from private companies who bid and manufactuer to specifacations mandated by the FBI. But again the answer is there is not nor ever has been an FBI specific issue knife. Weldonk