I once got an SMF slant that had what turned out to be an orange plastic slant grip. Needless to say it went straight back from whence it came. Repro slant grips are not common but they are out there. The weight will be the give away. The plastic grips are usually lighter weight. That certainly isn't phenolic resin or it would have coloured. Fittings are alright IMO. Pommel is typical.