▁intercept ors . ▁ ▁Spec ifications ▁( RS - 2 US ▁/ ▁K - 5 MS ) ▁ ▁L ength : ▁▁ ▁W ings pan : ▁▁ ▁Diam eter : ▁▁ ▁La unch ▁weight : ▁▁ ▁Speed : ▁ 8 0 0   m / s ▁() ▁ ▁Range : ▁▁ ▁Gu id ance : ▁beam ▁r iding ▁ ▁War head : ▁ ▁Oper ators ▁ ▁Form er ▁operators ▁▁ ▁Both ▁the ▁Soviet ▁Air ▁Force ▁( V VS ) ▁and ▁the ▁Soviet ▁Air ▁Def ence ▁Forces ▁( P VO ) ▁operated ▁the ▁K - 5 . ▁▁ ▁The ▁People ' s ▁Liber ation ▁Army ▁Air ▁Force ▁operated ▁lic ensed ▁Chinese ▁copy ▁of ▁Kal ining rad ▁K - 5 ▁designated ▁as ▁PL - 1 ▁( PL : ▁short ▁for ▁Pi ▁Li ▁or ▁P ili , ▁meaning ▁th under bol t ). ▁▁ ▁The ▁Czech oslov ak ian ▁Air ▁Force ▁operated ▁R S - 2 U ▁and ▁R S - 2 US . ▁▁ ▁The ▁Hung arian ▁Air ▁Force ▁operated ▁R S - 2 US ▁on ▁Mi G - 1 9 PM s , ▁Mi G – 2 1 PF s ▁and ▁Mi G – 2 1 M F s . ▁▁ ▁The ▁Polish ▁Air ▁Force ▁operated ▁R S - 2 US ▁on ▁Mi G - 1 9 PM s ▁and ▁Mi G - 2 1 s , ▁still ▁in ▁use ▁as ▁practice ▁target . ▁▁ ▁Loc ally ▁produced ▁A - 9 0 ▁copy ▁by ▁Elect rom ec an ica ▁P lo i esti ▁(