This Windham Weaponry WW-1 features a carbine-length system, a Magpul MOE M-LOK handguard, MOE vertical foregrip, a pinned Hogue stock, a Phase 5 ambidextrous charging handle, an ambidextrous safety, an ambidextrous mag release, a 1/9 twist, and a muzzle brake. The user manual, two 10-round PMAGs, two 30-round PMAGs, and two 40-round Promags 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.