Was at the range the other day and a fellow had a "Pachmayr" adjustable sight on his G19. I really liked it and was wondering if it was legal in the Amateur Civilian class? In the Glock Report under part 40.30 Allowable Modifications to Stock, it states: "5. Post and notch sights (patridge sights) excluding any sight requiring slide modifications. Please note that fiber-optic and express sights are now approved!" I didn't see anything about adjustible sights specifically and was just wondering. Thanks.