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M4E1 THREADED 18" 6.5 GRENDEL COMPLETE UPPER RECEIVER W/ ATLAS S-ONE HANDGUARD
Upgrade the performance of your AR15 build with this 6.5 Grendel Complete Upper Receiver. Designed to be a low recoil/high accuracy cartridge, the 6.5 Grendel is ideal for those looking to stretch the legs of their AR15 rifle, with proven results at 1000+ yards.
The 6.5 Grendel is designed on the AR15 platform. You will need to purchase a 6.5 Grendel specific bolt carrier group (available now) and magazine (not currently offered - coming soon). All other components are standard to the AR15 platform. This upper assembly does not include a BCG or Charging Handle.

M4E1 THREADED 18" 6.5 GRENDEL COMPLETE UPPER RECEIVER W/ ATLAS S-ONE HANDGUARD

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  • INCLUDES:

    • M4E1 Threaded Assembled Upper Receiver
    • ATLAS S-ONE Handguard of choice
    • 6.5 Grendel 18" Stainless Steel, Rifle Length Barrel
    • .750 Low Profile Gas Block and Rifle Length Gas Tube
    • A2-style Flash Hider
    • Product comes assembled
    • The 6.5 Grendel is designed on the AR15 platform. You will need to purchase a 6.5 Grendel specific bolt and magazine. All other components are standard to the AR15 platform. This upper assembly DOES NOT include a BCG or Charging Handle.

    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

    6.5 GRENDEL 18" STAINLESS STEEL, RIFLE LENGTH BARREL FEATURES:

    • 6.5 Grendel 18" Rifle Length Barrel
    • 416R Stainless Steel finish
    • 1/8 twist
    • 5/8x24 Threaded Pitch
    • SPR Profile
    • .750 gas block journal
    • Rifle length gas system
    • M4 Feed Ramp Extension
    • HP and MPI tested
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