Features: Upper Receiver BILLET Machined Aluminum Alloy Milspec Anodized Finish Lower Receiver BILLET Machined Aluminum Alloy Milspec Anodized Finish 13" Free Float M-Lok Forend 3" M-Lok lower Picatinny Rail 6 Position U.S. Stock SGM 33 rd Glock Style Magazine AR15 Configured Last Round Bolt Hold Open AR15 Configured Safety Selector AR15 Configured Magazine Release Barrel 16.5" NITRIDE 4150 Chromoly Steel 1:10 twist Bolt 4140 MELONITE NITRIDE Chromoly Heat Treated AR Style Muzzle Brake (.5"x28 threads per inch) Action: Blowback Chambered 9x19mm Nato Weight: 6.1 lbs. Length: 31.5" Accepts many AR15 Accessories