American Gunsmithing Institute AGI Video "Making Glocks Rock" is the last word on Glock handguns. Every alteration and addition imaginable for Glock pistols is covered in this comprehensive video. Triggers, sights, magazines, barrels and even caliber conversions are covered, as well as complete installation and modification instructions. Accuracy and reliability issues are discussed, as well as ways to improve both. This video is simply a must have for any Glock owner.