Aero Precision AR-15 M4E1-E Upper Assembly 5.56x45mm NATO 14.5" Barrel 12.7" ATLAS R-ONE Handguard with Pinned Epsilon SL Muzzle Device Black

Aero Precision M4E1 Threaded Complete Upper Receiver 5.56 NATO 14.5 in Barrel Government Profile 1-7 Twist 1/2x28 Thread 12 in ATLAS R-ONE M-LOK. Our proprietary ATLAS attachment system is a durable and dependable mounting platform maintaining a slim profile while still providing the strength and stability customers have grown to love from Aero Precision handguards. We've taken the pain out of building a legal 14.5in rifle build. These pinned and welded 14.5in complete uppers feature an Epsilon 556SL that is permanently affixed to the muzzle providing an overall legal length of 16in. Worried you might want to change your gas block? No worries The outer diameter of the Epsilon 556SL allows you to easily slide your gas block over the muzzle device making it easy to change or service your gas system. If you've had a 14.5in build planned but didn't want to deal with the hassle of getting it pinned and welded or being stuck with a specific configuration then our 14.5 pinned and welded barrels/uppers are for you Specifications for Aero Precision M4E1 14.5in 5.56 NATO Threaded Complete Upper Receiver: Manufacturer: Aero Precision Caliber: 5.56x45mm NATO Overall Length: 16 in Barrel Length: 14.5 in Barrel Twist Rate: 1-7 Threads per Inch: 1/2x28 Muzzle Device: Pinned VG6 Epsilon 556SL Finish: Anodized Color: Black Fabric/Material: 4150 Chrome Moly Vanadium 7075-T6 Aluminum Handguard Length: 12 in Gun Rail: Picatinny Gun Type: Rifle Included Accessories: VG6 Epsilon 556SL Condition: New Magazine Included: No Country of Origin: USA Features of Aero Precision M4E1 14.5in 5.56 NATO Threaded Complete Upper Receiver New enhanced forging that gives the upper receiver a "billet look" New picatinny profile that blends seamlessly with our Enhanced Series Handguards M4 Feedramps .250 takedown pin holes Laser engraved T-marks Includes port door and forward assist installed Quick disconnect sling socket at the 3 6 and 9 o'clock positions Compatible with low profile gas blocks Package Contents: Aero Precision M4E1 14.5in 5.56 NATO Threaded Complete Upper Receiver M4E1 Threaded Assembled Upper Receiver 12in ATLAS S-ONE Handguard 14.5in 5.56 CMV Barrel Pinned Low Profile Gas Block and Gas Tube VG6 Epsilon 556SL Aero Precision APAR700704M68: M4E1 Threaded Complete Upper Receiver 5.56 NATO 14.5 inch Barrel Government Profile Mid-Length 1-7 Twist 1/2x28 Thread 12 inch ATLAS R-ONE M-LOK Handguard Pinned VG6 Epsilon 556SL Brake Anodized Black