Radical Firearms 10.5" 223 Wylde Upper Receiver Group with 9"MHR Rail - Stainless Steel

Manufactured by Radical Firearms
SKU: FU10.5-223W-9MHR
MPN: FU10.5-223W-9MHR
Manufactured by Radical Firearms
6 Reviews

In Stock

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The Radical Firearms 10.5" 223 Wylde Upper Receiver Group with 9" MHR Rail brings a cutting-edge and reliable option to firearm enthusiasts. This MIL-STD upper receiver is designed to seamlessly integrate with any MIL-STD lower receiver. As a .223 Wylde chambered upper, it offers the flexibility of safely shooting both .223 Remington and 5.56 NATO rounds.

Ideal for both novice and seasoned shooters, this upper receiver group is an excellent choice for completing your firearm build and hitting the range. To get started, simply add your BCG (Bolt Carrier Group) and charging handle.


  • Chambered in .223 Wylde
  • 10.5" stainless steel barrel
  • Barrel made of 4140 Chrome Moly Vanadium
  • Threaded 1/2x28
  • 1:8 twist rate
  • A2 flash hider
  • Forged 7075-T6 upper receiver
  • Type III anodizing
  • Includes forward assist and dust cover
  • 9" free float M-LOK hybrid rail

Constructed with a 10.5" barrel length and carbine-length gas system, this upper receiver group boasts outstanding versatility and performance. The barrel is made from 4140 Chrome Moly Vanadium and features a stainless steel finish. It also includes a 1/2x28 muzzle thread.

The upper receiver is forged from 7075 T6 aluminum and has a Type III anodizing finish ensuring durability and longevity. Additional features include a low-profile gas block, A2 flash hider, forward assist, and dust cover.

With the inclusion of the 9" MHR free float rail system, this upper receiver group delivers enhanced accuracy and ensures your hands stay cool during prolonged use. The M-LOK Hybrid Rail provides excellent compatibility with a wide range of accessories.

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Barrel Coating
Barrel Length10.5
Barrel LiningStainless Steel
Barrel Material41V50 Chrome Moly Vanadium Steel
BrandRadical Firearms
Caliber Gauge.223 Wylde
Gas System LengthCarbine
Handguard9 in M-LOK Rail
Muzzle DeviceA2 Flash Hider
Thread Pattern1/2 X 28
Twist Rate1:8
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to www.P65Warnings.ca.gov.

Ratings & Reviews

6 reviews

  • 3 stars
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  • 2 stars
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  • 1 star
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Great purchase

by -

I got this barreled upper on sale and couldn't resist. Packaging and shipping from P.A was perfect and fast. This is a nice upper I have zero complaints feed ramps are perfect, I only ran about 20 rounds through it so far. And can't wait to run it more.



Purchased on sale. Happy to say it functioned perfectly. Was accurate. One of the best values I've found in a long time. Will in time replace muzzle to tame short barrel. Primary Arms made this purchase fun.


by -

Very nice and happy with it. well made. Thanks.

Just ok Radical upper


Just ok because the front rail was huge over torqued crushing the rail for no reason. Second gas port hole was drilled and never deburred piece of metal hanging down into barrel. Seeing this I definitely had to dismantle the complete upper no lube on barrel nut threads 😩. After reassemble I purchased a aero pro bcg when slipping this in it was tight and made dragging noise. A lot of lube and a lot of cycling bolt freed up. Head space was good .Hopefully will get better after shooting. I will update my first Radical fire arms upper. Definitely not what my perception of what I thought the company was.

awesome upper

by -

The upper fits well and is great quality.

Excellent little pea shooter


I don’t know why this is $120. This thing shoots great! I figured I was getting something like a BCA upper but no this is nice. Put it on a PSA lower and it’s the perfect little gun for shooting random creatures out in the woods.