Aero Precision M4E1 AR-15 5.56x45mm NATO 10.5 in M-LOK Upper Receiver Rifle Length Barrel 1-7 Twist 1/2x28 A2 Flash Hider 9 in M-LOK Handguard Magpul

Aero Precision M4E1 AR-15 5.56x45mm NATO 10.5 in M-LOK Upper Receiver Rifle Length Barrel 1-7 Twist 1/2x28 A2 Flash Hider 9 in M-LOK Handguard Magpul. 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. Anti-Rotation Tabs. Feed Ramp Extension. Scalloped Rails. Continuous Top Rail. Specifications for Aero Precision M4E1 AR-15 10.5in 5.56 Rifle Barrel Complete Upper Receiver with Flash Hider: Manufacturer: Aero Precision Caliber: 5.56x45mm NATO Barrel Length: 10.5 in Barrel Profile: Government Gas System Length: Rifle Length Barrel Twist Rate: 1-7 Firearms Threads Per Inch: 1/2x28 Handguard Type: Free-Float Muzzle Device: A2 Flash Hider Gun Model: AR-15 M16 Fabric/Material: 7075 T6 Aluminum Attachment Type: Picatinny Handguard Length: 9 in Handguard Style: M-LOK w/ Top Picatinny Rail System Gun Rail: M-LOK Gun Type: Rifle Gun Make: AR Platform Aero Precision Barrel Material: 4150 Chrome Moly Vanadium Gas Block Journal Size-Length: 0.75 in Bolt Carrier Group Included: No Charging Handle Included: No Magazine Included: No Condition: New Country of Origin: USA Features of Aero Precision M4E1 AR-15 5.56 Rifle Barrel Complete Upper Receiver with Flash Hider: 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 is forged into the receiver; Works with Aero Precision handguards but also fits most BAR-system handguards; Features of Enhanced Handguard: 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; Quick disconnect sling socket at the 3 6 and 9 o'clock positions; Additional milling along flats to aid with gripping and add visual appeal; New profile for the continuous picatinny top rail Features of 5.56 Rifle Length Barrel: 4150 CrMoV w/ QPQ finish; 1/7 twist; .750 gas block journal; Rifle length gas system; M4 Feed Ramp Extension; HP and MPI tested; Standard A2 flash hider Package Contents: Aero Precision M4E1 AR-15 10.5in 5.56 Rifle Barrel Complete Upper Receiver with Flash Hider Enhanced Handguard 5.56 Rifle Length CMV Barrel Low Profile Gas Block and Rifle Length Gas Tube Barrel Nut Wrench What firearm models does the manufacturer say Aero Precision M4E1 AR-15 10.5in 5.56 Rifle Barrel Complete Upper Receiver with Flash Hider is compatible with? The manufacturer suggests that Aero Precision M4E1 AR-15 10.5in 5.56 Rifle Barrel Complete Upper Receiver with Flash Hider is compatible with AR-15 M16Aero Precision APAR640222M2: M4E1 Complete Upper Receiver AR-15 10.5 in Rifle Length Barrel 9 in M-LOK Handguard No BCH/CH Magpul Cerakote Flat Dark Earth