16" 300 Blackout Upper with 12" FQR
16" 300 Blackout Upper with 12" FQR

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MSRP: $259.95

Stock Status:Ready to build; check lead times
Availability: Current Production Time Up To 4 Weeks
Product Code: FU16-300HBAR-12FQR


The Radical Firearms 16" HBAR profile 300BLK 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 12" FQR 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.

UPC: 814034024662
MFR#: RF00250

  • Barrel Length: 16"
  • Gas System: Pistol Length
  • Barrel Profile: HBAR Profile
  • Barrel Material: 4140 Chrome Moly Vanadium
  • Barrel Finish: Melonite
  • Muzzle Thread: 5/8x24
  • Chamber: 300BLK
  • Twist Rate: 1:8
  • 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: Quad Picatinny Rail
  • Handguard Length: 12"

Average Rating: 5 of 5 Total Reviews: 6 Write a review »

  0 of 0 people found the following review helpful:
Great upper September 19, 2017
Reviewer: Mike,M from 59901, MT United States  
Been running this upper on a spikes lower for approx 2 years now without a single hiccup, looks great and functions even better (well over 1000 rds, mostly 110 gr. Vmax)

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  0 of 0 people found the following review helpful:
one problem October 13, 2016
Reviewer: Thomas Fichtelman from Vero Beach, FL United States  
After 9 weeks finally got my upper. My biggest qualm is the rail does not match the rail on the upper and is slightly larger. Other then that, it seems good. Will take it to the range and test it shortly, once i get sights that I can mount without sliding them down the rail

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  0 of 0 people found the following review helpful:
Great Upper June 28, 2016
Reviewer: Kasey from WV  
This a great receiver for a great price. Took a little longer to get to me than expected but well worth the wait. Put it on my DPMS lower and paired it with a Nikon P300Blk scope and having great results. ran everything from 110 gr to 208 gr bullets through and no FTF or FTE. Would recommend anything Radical makes to anyone. Thanks again

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  2 of 2 people found the following review helpful:
Impressive March 19, 2016
Reviewer: Craig from Las Vegas, NV United States  
Threw the upper on a S&W M&P15 sport lower.  200rds first day out from 3 manufacturers.  Two supersonic, one subsonic 200gr.  Zero malfunctions, hiccups of any kind.  Dead accurate, and good looking.  Sole issue I have is that the dust cover is poorly finished...too minor to pull a star for.  Would absolutely buy again.

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  0 of 0 people found the following review helpful:
300 upper March 15, 2016
Reviewer: Timothy Christopher from Piedmont, AL United States  
I ordered my 300 blackout upper over a month ago, and finally got it 2 days ago. First let me say the company is operated largely with Vets and that appealed to me. Then you upper is custom made when you order hence the long period of wait time, but we'll worth the wait. The craftsmanship is phenomenal, I am highly impressed. I recommend this company to anyone looking for quality. Thanks Radical firearms for making this build so easy

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