Aero Precision M4E1 Enhanced 10.5 Inch 5.56 Barrel Complete Upper Receiver with 9 Inch Quad Rail Anodized Black APAR640221Q2

Aero Precision APAR640221Q2: This Complete Upper includes Aero Precision's Gen 2 Enhanced Handguard. Key features include the quick disconnect sling sockets, enhanced milling design for grip and visual appeal, and a new profile for the picatinny top rail. This complete upper does not include BCG or Charging Handle. Includes: M4E1 Enhanced Assembled Upper Receiver, Enhanced Handguard of choice, 10.5" 5.56 CMV Barrel, Low Profile Gas Block and Carbine Length Gas Tube, Product comes assembled, The muzzle brake that comes with this complete upper receiver is NOT pinned nor welded to this barrel. M4E1 Upper Features: Forged from 7075 T6 aluminum; Precision machined to M4E1 specs; M4 feedramps; Matte black hard coat anodized Mil 8625 Type 3 Class 2; Laser engraved T-marks; Comes assembled, with port door and forward assist installed; Accepts standard AR15/M16 components; Handguard mounting platform is forged into the receiver; Works with Aero Precision handguards but also fits most BAR-system handguards; Barrel nut and wrench are included. Gen 2 Enhanced Handguard Features: 1pc free float design; 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; Gen 2 Feature - Quick disconnect sling socket at the 3, 6 and 9 o'clock positions; Gen 2 Feature - Additional milling along flats to aid with gripping and add visual appeal; Gen 2 Feature - New profile for the continuous picatinny top rail. 10.5" 5.56 Barrel Features: 5.56 Nato 10.5" Barrel, 1/7 twist, 4150 CrMoV, QPQ, gas port drilled; .750 gas block journal; Carbine length gas system, .0785 gas port; M4 Feed Ramp Extension; HP and MPI tested; Standard A2 flash hider.