This used LUSA A2 rifle fires the 9mm round. It is a recoil operated, magazine fed, semi-automatic rifle. It has a 16" barrel with an overall matte black finish. This semi-auto rifle has a fake suppressor, a retractable stock, soft tactical bag, an extra barrel (short "display" barrel that is not functional), and sight adjustment tool. If you want a 9mm carbine similar to the UZI or HK MP5 at a fraction of the cost this is the gun for you. This rifles has features that are very similar to UZI and HK MP5 rifles.