This video demonstrates the correct [and cheap] way to perform a trigger job on an AR-15 with a standard mil spec trigger. It will guide you through the “what and where” of properly stoning the fire control group [FCG] components with an armorers stone. It also provides a detailed how-to on swapping out the hammer / trigger / disconnector springs for a lighter set using the JP Enterprises Reduced Power Spring Kit [3.5lb].
This is a great video that deserves some attention; a data compilation and analysis of real-world handgun shootings. It examines their effectiveness when weighed against other pistol calibers, and against rifles and shotguns.
This video tutorial shows you how to properly align standard rifle aperture/peep sights. It also gives you precise visual queues on correct sight picture.
I can honestly say that I never experienced any real problems with the gas impingement system of the Stoner design. However, I quickly learned to dread the filth that would become of my BCG after even a short range session. I felt as though I was spending more time scrubbing carbon than flinging lead.