This Diamondback rifle includes two 30-round magazines, MBUS flip-up sights, MAGPUL furniture, and a 12" M-LOK handguard. Purchase includes an extra 300BLK receiver with a 12" M-LOK handguard. 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.