Action: Semi-Auto - Caliber: 5.56 NATO - Capacity: 30rd - Barrel: 16.1 (1:7) Fluted NiCorr Treated - Receiver Upper: Black - Receiver Lower: Black - Stock: LWRC Adj. Compact Black - Grip: LWRC Grip - Handguard: LWRC Modular 12 Rail System Black - Sights: Magpul - Length: 32-35.25 - Weight: 7.3 lbs. - LWRC High Efficiency FH - LWRC Enhanced Fire Control Group - LWRC Ambidextrous Sling Mount - LWRC Ambidextrous Charging Handle - Comes with Picatinny Rail Sections for Attachments - Standard A2 Flash Hider