5.56 Custom Upper
From: $479
The 5.56 Custom Upper Builder is perfect for customizing a new assembled upper to pin on your lower. Designed as an à la carte package, you can choose each individual component to fit your style and needs. The base price includes the following:
- Rosco or Satern’s Liberty Barrel
- Grendel Hunter Upper Receiver – Black Anodized
- Mil-Spec Forward Assist & Dust Cover
- 12″ MLOK Grendel Hunter Hanguard – Black Anodized
- Low Profile Gas Block – Black Nitride
- Gas Tube (Length dependent on barrel selected) – Stainless Steel
- A2 Flash Hider and Jam Nut – Black Nitride
NOTE: The 11″ handguards will cover a Carbine length gas system, but not a Mid Length. Other lengths will cover both.
Comes assembled
Customize your kit with the options below
Kevin –
Easy to build
Robert Lee –
Lots of great choices 👍
Derek Pound (verified owner) –
I’m not much of a review person but my AR build came out so far above expectation I felt that I needed to chime in. I had been looking all over the world wide web for an upper receiver to pair with a couple of lowers that I have had sitting around, but no matter how hard I looked I couldn’t find one that was exactly what I was looking for. Whether it was handguard length, the barrel, the compensator, or any other detail, nothing was quite right. That is until I found Grendel Hunter. The ability to mix and match each of the components to end up with a product that I wouldn’t have made differently if i was given free reign in a Optics Planet warehouse, was incredible. I included a Velocity 3lb trigger in that order and then came back to get a new mil-spec buffer tube with the Stealth 4.7oz recoil spring kit. I had been to the range before installing the recoil spring system and was already insanely impressed but once I changed out the spring and buffer tube I could have died a happy man. The gas system needed 0 adjustment to cycle perfectly and all said and done, I can say without hesitation that I have never shot a more stable, accurate, or faster firing semi-auto AR in my life. If you don’t want to take my opinion at face value the 4 other members at my club that squeezed off a mag or two said the exact same thing as well. Between the ability to completely customize every option of your build, the incredible esthetic, how well they function, and the fact that they assembled it and had it shipped within 24 hours of placing my order, I am all in on Grendel Hunter for my next 6.5 Grendel build.