phone: 888-310-0284

Long-range 6.5 Grendel AR kits for maximizing your accuracy.

Who says the 5.56/.223 platform AR-15 can't reach out past 500 yards? What about 800 yards or more? That's exactly what a 6.5 Grendel Rifle Kit can provide you. These kits utilize almost entirely 5.56/.223 components - including upper and lower receivers, parts kits, handguards, buffer and tubes, the works - while swapping the usual barrel for a Grendel setup and a high-pressure bolt capable of handling the Grendel's extra powder burn.

Match Barrels for Hyper Accuracy

All barrels in these 6.5 Grendel kits are precision-forged from mil-spec 4150 CMV or 416R Crucible stainless, providing hardened and polished rifling lands and grooves that guarantee the most accuracy possible. Barrels sport a 1:8 twist rate, which provides the most gyroscopic stability for 6.5 Grendel's heaviest and most accurate loads.

What's Included (Grendel Kit Specs)

Barreled Upper Assembly

  • Grendel Type II chamber
  • 0.750" gas ports
  • 1/2x28 threads
  • Button rifling
  • Free-float handguard
  • M4 flattop upper receiver
  • M4 feed ramps

Grendel Bolt Carrier Group

  • M16 / Full-Auto carrier
  • Forged from 9310 steel
  • High-pressure bolt and firing pin
  • Type II bolt face for reliable ejection
  • Staked gas key, chrome-lined body

Lower Parts Kit

  • Mil-spec LPK
  • Single-stage trigger
  • ~4.5-lb. trigger pull

Stock Assembly

  • Carbine buffer tube
  • Carbine buffer weight
  • M4-type buttstock 

Pair with an AR-15 Lower or 80% Lower!

Since Grendel loads utilize standard 5.56/.223 components, that means you get to use a regular AR-15 stripped lower receiver or 80% lower. Grendel requires specific magazines, but the exterior of the magazine body first perfectly in the standard AR-15 lower, with no modifications required for the mag catch or release button.

Want to know more? Read our 6.5 Grendel AR-15 Build Guide.

State Laws May Vary

Contrary to federal law, some states have either restricted or banned the sale, transfer, and ownership of 80% lowers, firearm blanks, and other gun parts, like these 6.5 Grendel kits. Because of these restrictions, we cannot ship our products to certain states. Please confirm whether your state is restricted on our Shipping & Return Policy before placing an order. We cannot fulfill orders to restricted states if placed.


DISCLAIMER: If you are new to the world of DIY gun building, you likely have a lot of questions and rightfully so. It’s an area that has a lot of questions that, without the correct answers, could have some serious implications. At, we are by no means providing this content on our website to serve as legal advice or legal counsel. We encourage each and every builder to perform their own research around their respective State laws as well as educating themselves on the Federal laws. When performing your own research, please be sure that you are getting your information from a reliable source.

We are a national retailer of individual components and not all products depicted on this website are legal in every state. Shipping of various products found on this website are prohibited to some states (such as California, Connecticut, District of Columbia, Hawaii, New Jersey, New York, Rhode Island, and Washington). The information, pictures, text or products presented on this website are not a representation by us, and should not be understood by you, that any product or completed firearm is legal to assemble or own in your state of residence. We encourage each and every builder to perform their own research about the state and federal laws that apply to them. It is your responsibility to understand the law and we encourage you to consult with an attorney or your local ATF representative.