This Blackout Defense Q15A Quantum has a 223 Wylde chamber, 1/8 twist rate, Keymo flash hider, Blackout Defense 0 set trigger, an adjustable gas block and an ambi charging handle. 1-30 round magazine, the original box and manual are included. Get the best bang for your buck when you get a Certified Used Firearm. When you see the Certified Used stamp on any of our firearms, you can be confident that you're getting exactly what you want - a gun only in very good to excellent condition and held to the highest quality standard. All Certified Used Guns come with a 'no questions asked' return policy.