As fate would have it we found four more HK21E/23E barrel grip components directly after posting the above ad. All parts are German HK production from of the last lot of 21/23 parts to leave HK Germany.
HK21E HK23E ROLL PIN FOR BARREL GRIP NEW, GERMAN $8.95
HK21E HK23E SET BOLT FOR BARREL GRIP NEW, GERMAN $9.95
HK21E HK23E ELBOW SPRING FOR BARREL GRIP NEW, GERMAN $12.95
HK21E HK23E CYLINDRICAL PIN FOR BARREL GRIP NEW, GERMAN $4.95
New parts added daily. Keep an eye on our new arrivals page to watch for new additions.