Compact Red Green Dot Co-Witness Scope + Low Profile Rail Scope Mount fits most Mil-Spec H&k Hk 1st Generation GSG5 GSG-5 MP-5, PTR-91, PTR-91K, Hk91, Hk93, Hk33, G3, PTR-91KC, PTR91KF, PTR91KCM4, PTR91KFM4, PTR91KPF, PTR PDW, PTR 32, Cetme Rifles and similar clones Hk Combo Kit UTG Compact Red Green Dot Co-Witness Scope Low Profile Rail Scope Mount For Hk Rifles FEATURES Brand New Will fit the "1st Generation" of the GSG-5 Rifles and Pistols. Will not fit 2nd or 3rd Generation GSG-5 rifles or pistols.