American Made
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18" 6.5 Grendel Melonited 12" HD Quad Rail Upper
On Target With
Savings Of
Original Price $339.99
Sale Price $269.99
An 18" 6.5 Grendel machined from Mil-B Spec 4150CMV with our Hardened Arms LLC Melonited barrel delivers the full accuracy potential of this cartridge and is ideal for hunting, tactical engagements and precision distance shooting. This 6.5 Grendel upper ill deliver a very  flat trajectory and high feet per second velocity that will give you great groups and awesome results.

When Ordering please note that the 6.5 Grendel requires a 6.5 Grendel bolt for proper head-spacing (5.56mm & 7.62x39mm BCGs will not function properly). 

AR-15 6.5 Grendel Barreled Upper Receiver Assembly:

    Hardened Arms M4 Feed Ramp Flat Top Receiver
    Black anodized mil-spec finished upper receiver
    Feed ramps for increased feeding reliability on barrel and upper
    Laser etched T-Marked upper receiver
    4150 Chrome Moly Vanadium Barrel Machined In House
    Melonite Finish
    Chambered in 6.5 Grendel
    18" Socom Profile barrel with M4 Extension
    1:8 Barrel twist
    .750" diameter at gas block
    5/8x24 threaded muzzle/barrel
    Low profile gas block
    Barrel dimpled to secure gas block
    Mid-length gas system
    Thread Protector
    12" HD Quad Rail without end cap

Available Bolt Carrier Group Package (
Add On Option) :
    6.5 Grendel Melonited BCG
    Mil-Spec Charging Handle
    ASC 10rd 6.5 Grendel Magazine

Fits any mil-spec AR15 lower receiver.

Hardened Arms uppers are high end, accurate, head spaced, inspected and test fired prior to shipping. They are built using stringent specs, top quality parts and procedures to ensure maximum reliability and performance.

You are responsible for knowing your state laws regarding barrel lengths, pistol and short barreled rifle restrictions. A 20% restocking fee will apply if you cancel anytime after ordering or if you can not take delivery due to state restriction. Dealer programs are available on our website. Two year warranty against manufacturer defects. Finishes will wear with use, no warranties apply to finish wear.  Fits any mil-spec AR15 lower receiver.

515 Tucker Ave Friday Harbor, WA 98250 |
Phone: 425-530-0837