Radical Firearms 16" 6.5 Grendel Type II 1:9 Mid-length Medium Complete Upper - 15" M-LOK MHR Rail

Manufactured by Radical Firearms
1 Reviews


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The Radical Firearms 16” 6.5 Grendel Complete Upper Receiver is a match grade, drop-in solution for your next AR build. Crafted with quality materials and covered by Radical’s lifetime warranty, this MIL-SPEC upper receiver provides an outstanding solution for any budget. Arrives at your door with the hard work done! Complete the build with your favorite lower receiver and sights then head for the range.

The Radical Hybrid Rail System offers a generous 1.8” inside diameter that easily accommodates most suppressors. Lightening cuts along the rail reduce weight and aid in rapid cooling while M-LOK and Picatinny mounting points provide space for your favorite accessories. Features anti-rotation tabs, non-rotating QD sling mounts, and a tough hardcoat anodized finish.

Safety Note: Choosing 6.5 Grendel comes with an added complication. There are “Type I” and “Type II” bolt/barrel specifications out there, and you CAN NOT mix and match parts for each of them without risk of damage and/or injury. Type II is by far the most popular configuration, but pay attention to what you are buying! A Type I bolt won’t chamber rounds in a Type II barrel at all. Even worse, a Type II bolt mated to a Type I barrel will create excessive headspace and result in a rifle that is dangerous to fire.

  • Chambered in 6.5 Grendel with 1:9 twist rate
  • 16” 416R stainless steel mid-length barrel
  • 6.5 Grendel bolt carrier group
  • BCG high pressure tested and magnetic particle inspected
  • Standard charging handle
  • Radical Firearms Pepper Pot Compensator
  • 15" Radical Firearms Hybrid M-LOK MHR Rail
  • Made in the U.S.A. in Stafford, Texas!


Barrel Length16
Barrel Material416 Stainless Steel
BrandRadical Firearms
Caliber Gauge6.5 Grendel Type 2
Gas System LengthMid-Length
Gas System TypeDirect Impingement
Handguard15 in M-LOK Rail
Muzzle DeviceRadical Firearms Pepper Pot Compensator
Twist Rate1:9

Ratings & Reviews

1 review

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Would buy again

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This shoots sst very well. MOA at 100 easy. Plenty for deer to 300-400 yards. Hand guard is a little larger diameter than I prefer but would work well with a suppressor. Happy would buy again. Very short and handy. Will need to add Quick release contact point as the aluminum hole is not durable enough. Just spend 20$ on a good one if you climb or use a sling hard.