Nordic Components' 22RB dedicated 22 upper receiver converts your standard AR-pattern lower to a dedicated .22LR for recreational shooting, training, and hunting. The 22RB is manufactured using the same materials as most standard AR-15 rifles, ensuring that it is a dedicated .22 upper that looks and feels like a centerfire rifle. Features: 1-16 twist match barrel NC-PCC flash suppressor Aluminum slim diameter handguard Aluminum upper