The POF 00907 Renegade Plus Upper: POF didn\'t want to produce just another typical carbine when they decided to create a direct impingement rifle. The Renegade Plus Upper is the epitome of what an AR-15 with direct impingement can and should be. It showcases upgrades like a roller cam pin and our renowned heat sink barrel nut, going way beyond the mere aesthetic enhancements commonly seen in today\'s rifles. In short, the Renegade + resolves every weak point found in the traditional direct impingement system. The 9-position adjustable Dictator gas block lets you precisely control your rifle. It can be tuned based on ammo load or suppressor use. The straight gas tube eliminates the problematic heat accumulation that standard gas tubes typically face. The roller cam pin provides a smoother, more dependable link to the upper receiver.