This optic-ready Tisas PX-9 Gen 3 SF Night Stalker features a flared magwell, and a threaded barrel with protector. Purchase includes the original case, manual, one 18-round magazine, one 20-round magazine, a loader, optic plates, side/back straps, and an IWB trigger guard holster. 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.