Aero Precision M4E1 Enhanced 20" 6.5 Grendel Complete Upper Receiver - APAR640232M53

Aero Precision APAR640232M53: Upgrade the performance of your AR15 build with this 6.5 Grendel Complete Upper Receiver. Designed to be a low recoil/high accuracy cartridge, the 6.5 Grendel is ideal for those looking to stretch the legs of their AR15 rifle, with proven results at 1000+ yards. The 6.5 Grendel is designed on the AR15 platform. You will need to purchase a 6.5 Grendel specific bolt carrier group, available here, and magazine, available here. All other components are standard to the AR15 platform. This upper assembly DOES NOT include a BCG or Charging Handle. Includes: M4E1 Enhanced Assembled Upper Receiver; Enhanced Handguard of choice; 6.5 Grendel 20" Stainless Steel, Rifle Length Barrel; .750 Low Profile Gas Block and Rifle Length Gas Tube; A2-style Flash Hider; Product comes assembled. M4E1 Enhanced 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 (Anodized only); Comes assembled, with port door and forward assist installed; Accepts standard AR15/M16 components; Handguard mounting platform forged into the receiver; Works with Aero Precision handguards but also fits most BAR-system handguards; Barrel nut and wrench included. Enhanced Handguard Features: 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; 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. 6.5 Grendel 20" Stainless Steel, Rifle Length Barrel Features: 6.5 Grendel 20" Rifle Length Barrel; 416R Stainless Steel finish; 1/8 twist; 5/8x24 Threaded Pitch; DMR Profile; .750 gas block journal; Rifle length gas system; M4 Feed Ramp Extension; HP and MPI tested.