Aero Precision M4E1 Threaded 5.56mm Complete Upper Receiver 16in Mid Length Pencil Barrel 1-7 Twist A2 Flash Hider ATLAS R-ONE Handguard Black

Aero Precision M4E1 Threaded 5.56mm Complete Upper Receiver 16in Mid Length Pencil Barrel 1-7 Twist A2 Flash Hider ATLAS R-ONE Handguard Black. Specifications for Aero Precision M4E1 16in 5.56 ATLAS R-ONE M-LOK Complete Upper Receiver with Flash Hider: Manufacturer: Aero Precision Caliber: 5.56x45mm NATO Overall Length: 26 in Barrel Length: 16 in Barrel Twist Rate: 1-7 Muzzle Device: A2 Flash Hider Gun Model: AR-15 Gas Block Journal Size-Diameter: .750 in Handguard Length: 15 in Handguard Style: Quad Rail Gun Make: AR Platform Barrel Material: 4150 Chrome Moly Vanadium Weight: 48.5 oz Bolt Carrier Group Included: No Charging Handle Included: No Magazine Included: No Condition: New Country of Origin: USA Features of Aero Precision M4E1 16in 5.56 ATLAS R-ONE M-LOK Complete Upper Receiver with Flash Hider 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 ATLAS S-ONE Handguard Features: Front and rear picatinny rail Eliminated center of top rail for weight reduction Indexing grooves in 12:00 position for positive grip control Compatible with mil-spec AR15 upper receivers and barrels MLOK attachment points Package Contents: Aero Precision M4E1 16in 5.56 ATLAS R-ONE M-LOK Complete Upper Receiver with Flash Hider M4E1 Enhanced Assembled Upper Receiver 15in ATLAS R-ONE M-LOK Handguard 16in 5.56 HBAR barrel Low Profile Gas Block and Mid-Length Gas Tube Product comes assembled What firearm models does the manufacturer say Aero Precision M4E1 16in 5.56 ATLAS R-ONE M-LOK Complete Upper Receiver with Flash Hider is compatible with? The manufacturer suggests that Aero Precision M4E1 16in 5.56 ATLAS R-ONE M-LOK Complete Upper Receiver with Flash Hider is compatible with AR-15Aero Precision APAR700705M39: M4E1 Threaded 5.56mm Complete Upper Receiver 16in Mid Length Pencil Barrel 1-7 Twist A2 Flash Hider ATLAS R-ONE Handguard Black Anodized