I am a big fan of the YouTube channel TWANGEnBANG, especially their GLOCK content. The most recent GLOCK video shows the differences in appearance, geometry, and extraction of the GLOCK Dipped, GLOCK non-dipped, and Apex Tactical Extractor complete with slow motion video. If you have one of the seemingly many GLOCKs that is experiencing extraction issues like brass to the face or inconsistent extraction, this video will be very helpful to you as you try to fix the issues.