This Complete Upper includes our Gen 2 Enhanced Handguard! Key features include the addition of quick disconnect sling sockets enhanced milling design for grip and visual appeal and a new profile for the picatinny top rail. - Includes: - M5E1 Enhanced Assembled Upper Receiver - 15 Enhanced M-LOK Handguard - 18 .308 Fluted Stainless Steel Barrel Rifle Length - Low Profile Gas Block and Rifle Length Gas Tube - .308 A2 Birdcage Flash Hider - Product comes assembled - This complete upper does not include BCG or Charging Handle. - M5E1 Upper Features: - Forged from 7075 T6 aluminum - Precision machined to our specs - M4 feedramps - Laser engraved T-marks (Anodized only) - .2795 takedown pin holes - Accepts standard AR .308 components - Comes with forward assist and port door installed - Handguard mounting platform is forged into the receiver - Gen 2 Enhanced Handguard Features: - Added quick disconnect sling socket at the 3 6 and 9 o'clock positions - Milled additional surfaces along flats to aid with gripping and add visual appeal - New profile of the Picatinny Top Rail - 1pc free float design - Rail is Machined from 6061-T6 Aluminum - Built in Anti-Rotation tabs - Scalloped rails - Continuous top rail - 1.78 inside diameter fits most muzzle devices and 1.5 suppressors - Compatible with low profile gas blocks - 18 .308 Fluted Stainless Steel Barrel Rifle Length Features: - .308 Winchester 18 Barrel 1/10 twist 416R Stainless Steel gas port drilled - .750 gas block journal - Rifle length gas system - M4 Feed Ramp Extension - HP and MPI tested - Standard .308 A2 flash hider