gigag04 wrote:Training.
Later? A light and a sight.
Most of the stuff people put on ARs just add weight and serve no real purpose than looking "tacticool." The most important upgrade you can put on an AR is a good light. Next a trigger upgrade and a decent optic. You don't have to spend a bundle on the trigger a JP Enterprises trigger spring kit will usually be all you need. Quality mags and ammo are way more important than useless attachments. Learn how to use the gun and train, train, train,