Marine Gun Builder reviews Polymer 80 P80 build frames with the corresponding Glock Models. MGB is a Chief Instructor at Freedom Crew University. Visit the university website here: <a href="https://www.freedomcrewuniversity.com/" target="_blank" rel="nofollow">https://www.freedomcrewuniversity.com/</a> Other Glock training Instructors @TheRogueBanshee @tacticaltrashpanda @flyingRich @DLDafterDark @chairmanwon (P80 Ralph) @shoguncustoms @angrysarge all teach a wide variety of Glock classes, courses, and programs.