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. The Diamondback DB15 represents value and versatility at a very affordable price. This DB15 comes standered with a 15, M-LOK rail, the classis A2 flash hider. Magpul MOE furniture, a 16, carbine length barrel and hardcoat anodized black.