M4E1 Threaded 14.7″ 5.56 Pencil Complete Upper Receiver w/ ATLAS S-ONE Handguard


Buy Now


This complete upper includes our new ATLAS S-ONE Handguard! The S-ONE line of handguards are designed with size and weight in mind, providing the perfect addition to your lightweight build. 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.Includes:M4E1 Threaded Assembled Upper ReceiverATLAS S-ONE Handguard of choice14.7″ 5.56 Mid Pencil Length BarrelLow Profile Gas Block and Mid Pencil Length Gas TubeProduct comes assembledThis complete upper does not include BCG or Charging Handle. These products may be selected as add-ons under the Finish Your Build tabThe muzzle brake that comes with this complete upper receiver is NOT pinned nor welded to this barrel. Per the National Firearms Act, the muzzle brake MUST be pinned and welded to achieve the necessary 16″ as defined by the ATF for a rifle build.M4E1 Threaded Upper Receiver Features:New enhanced forging that gives the upper receiver a “billet look”New picatinny profile that blends seamlessly with our Enhanced Series HandguardsM4 Feedramps.250 takedown pin holesLaser engraved T-marksIncludes port door and forward assist installedATLAS S-ONE Handguard Features:Front and rear picatinny railEliminated center of top rail for weight reductionIndexing grooves in 12:00 position for positive grip controlQuick disconnect sling socket at the 3, 6 and 9 o’clock positionsCompatible with low profile gas blocks1.3″ Inside diameter1.5″ Outside diameterCompatible with mil-spec AR15 upper receivers and barrelsLearn More about our NEW ATLAS S-ONE Hanguards14.7″ 5.56 Pencil Profile Mid-Length Barrel Features:5.56 Nato 14.7” Barrel, 1/7 twist, 4150 CrMoV, QPQ, gas port drilled.625 gas block journalPencil profile – light weightMid-Length gas system, .0785 gas port M4 Feed Ramp ExtensionHP and MPI testedStandard A2 flash hider

Additional information


Aero Precision


There are no reviews yet.

Be the first to review “M4E1 Threaded 14.7″ 5.56 Pencil Complete Upper Receiver w/ ATLAS S-ONE Handguard”

Your email address will not be published. Required fields are marked *



Join Us And Never Miss Any Of The Latest Tips, Tricks, And Updates.

You have Successfully Subscribed!

Pin It on Pinterest