Caliber: 5.56 NATO, 300 BLK. Gas-piston operation. Barrel: 16.5”. Rail length: 14.5”. Weight: 7 lbs. Collapsed length: 34”. E2 Extraction Technology. Gen4 lower receiver, ambidextrous fire controls, modular free-floating rail platform, redesigned handguard. Add $134 for Burnt Bronze or Tungsten finishes. Introduced 2002. 300 BLK added 2023. SEE POLITICAL PANIC PRICING.