For USA Spec FAC RWS-Diana-Umarex 48-52-54-56 etc.
Factory OEM power with spring, guides x (2), sample tar.
Rear flange washer is hardened and bonded with PTFE coating.
Not for use in the RWS 350 or RWS 460.
Seal is now optional.
Kit requires no gun modifications- straight drop in kit.
Foreign countries need to supply us with their spring specifications like wire size and number of coils as some new guns have reduced stroke pistons that differ from our USA spec FAC guns.
