The Diamondback DB15 223WB Rifle is made entirely in the USA! Starting with the tried-and-true, U.S. Military-proven gas-impingement system and using only the highest quality components machined in Diamondback’s CNC facility. The DB15 raises the bar when it comes to features and performance when compared to others. Diamondback DB15 represents value and versatility all at a very affordable price. This rifle features a 223 Wylde chamber which allows you to fire .223 rem or 5.56mm ammunition.