For beginners and veterans who need a refresher course on gas blowback rifle maintenance, Waldo Dynamics got you covered... "A quick and simple GBBR cleaning guide for those of you who might be beginners or looking for some guidance. A simple field strip, wipe down, and grease up. Please don't lose your minds in the comment section if I didn't cover every single intricate detail on how you've been cleaning your GBBRs for 10+ years."