FEATURES:

    M4E1 Threaded Assembled Upper Receiver

    ATLAS S-ONE Handguard of choice

    10" .300 Blackout CMV Barrel

    Low Profile Gas Block and Pistol Length Gas Tube

    Product comes assembled

    This complete upper does not include BCG or Charging Handle. These products may be selected as add-ons under the FINISH YOUR BUILD tab

    The muzzle brake that comes with this complete upper receiver is NOT pinned nor welded to this barrel.

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 Handguards

    M4 Feedramps

    .250 takedown pin holes

    Laser engraved T-marks

    Includes port door and forward assist installed

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

    Quick disconnect sling socket at the 3, 6 and 9 o'clock positions

    Compatible with low profile gas blocks

    1.3” Inside diameter

    1.5” Outside diameter

    Compatible with mil-spec AR15 upper receivers and barrels

    Learn More about our NEW ATLAS S-ONE Hanguards

10" .300 Blackout Barrel Features:

    Length: 10"

    Twist: 1 in 7

    Muzzle: 5/8x24 Threaded

    Material: 4150 Crome Moly Vanadium

    Finish: QPQ corrosion resistant finish both inside and out

    Gas Block: .750

    Gas Port: .0935

    Gas System Length: Pistol

    Weight: 21oz

    M4 Barrel Extension

    HP and MPI Tested