10.5" 5.56mm upper with 9" FHR
10.5"  5.56mm upper with 9" FHR

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MSRP: $289.95

Stock Status:Ready to build; check lead times
Availability: Usually Ships in 1 to 2 Weeks
Product Code: FU10.5-5.56M4-9FHR


The Radical Firearms 10.5" M4 profile 5.56mm is a MIL-STD upper ready to drop on any MIL-STD lower Receiver. Perfect for the novice or advanced shooter wanting to finish out that build and hit the range.Simply add your BCG,charging handle and you are ready to go. Built with our 9" FHR free float rail system for increased accuracy and keeping your hands cool. No matter what your style of shooting is, Radical Firearms has you covered.

SKU: FU10.5-5.56M4-9FHR
UPC: 81403402431
MFR#: RF01136

  • Barrel Length: 10.5"
  • Gas System: Carbine Length
  • Barrel Profile: M4 Profile
  • Barrel Material: 4140 Chrome Moly Vanadium
  • Barrel Finish: Melonite
  • Muzzle Thread: 1/2x28
  • Chamber: 5.56mm
  • Twist Rate: 1:7
  • Barrel Extension: M4 Feed Ramp
  • Gas Block Type: .750 Low-profile Gas Block
  • Muzzle Device: A2 Flash Hider
  • Upper Receiver Material: Forged 7075 T6
  • Upper Receiver Style: M4 Mil-Std
  • Upper Receiver Finish: Type III Anodizing
  • Forward Assist: Yes
  • Dust Cover: Yes
  • Handguard Type: Free Float
  • Handguard Style: Keymod Hybrid Rail
  • Handguard Length: 9"

Average Rating: 4.5 of 5 Total Reviews: 5 Write a review »

  0 of 0 people found the following review helpful:
RF 10.5" M4 5.56MM Radical Rail Upper Assembly May 3, 2017
Reviewer: joseph from Niceville , FL United States  
great product very happy with my upper. I was worried when I saw the 8 week production time (after I placed my order of course). But to my surprise i got it in a week yeah ordered oct 5th it was in my hands on the 12th  already put a hundred rounds through it with no problems thanks again

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  0 of 0 people found the following review helpful:
Very impressed! July 23, 2016
Reviewer: ronald weber from Harrisburg, PA United States  
I bought this upper for my wife who is also an LEO. I bought a piston AR pistol the next day and when her upper came in the mail I wished I bought an upper for me too. The hybrid rail is fantastic and the quality is spot on. I will be ordering myself one here very soon. Thanks

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  1 of 1 people found the following review helpful:
Super Happy July 1, 2016
Reviewer: James from Glendale, CO  
I'd rate this 6 stars if I could! Way higher quality than what I expected. Lightening fast shipping too! My jaw dropped when it came in the mail today. Wasn't expecting it for a couple more weeks. Radical Firearms FTW!!!

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  0 of 0 people found the following review helpful:
Awesome quality and rail June 5, 2016
Reviewer: Anonymous Person from CA United States  
Looks to be a real nice upper. It took over 3 months to get but I knew this going into it.

Customer service was good and all emails were answered in a reasonable time.

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  0 of 0 people found the following review helpful:
Bad Experiance May 15, 2016
Reviewer: Robert from Fort Worth , TX United States  
Overall terrible experience. I ordered this upper receiver with the BCG, Charging Handle and Spitfire Muzzle device when I finally received the item in the mail they had only shipped the upper with no BCG Charging Handle or Muzzle device. After sending in some photos and dealing with customer service they finally sent the correct items.  Disappointing to say
the least.

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