8.5" 300 Blackout Upper with 7" FGS
8.5" 300 Blackout Upper with 7" FGS

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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: FU8.5-300HBAR-7FGS


The Radical Firearms 8.5" Hbar profile 300 AAC Blackout 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 7" FGS 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: 814034024563
MFR#: RF00231

  • Barrel Length: 8.5"
  • 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: 1:7
  • 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: Magpul MOE Round Rail
  • Handguard Length: 7"

Average Rating: 4.5 of 5 Total Reviews: 7 Write a review »

  0 of 0 people found the following review helpful:
So Far So Good May 3, 2017
Reviewer: Michael from NH  
I'm doing this review in 2 parts. Initial impressions and I'll follow up with a range report after I take it out.

First off, when I purchased the production time was listed as 3-6 weeks. Mine shipped in 5 weeks and 2 days from when I placed the order. Spot on. A long time to wait, but I knew that was the time frame and they met that expectation. Thank you.

Fit and Finish seem to be about average for every AR/AR part I've purchased. Which is honestly better than I expected at the price point. The Radical Firearms bolt Carrier is a slick side affair with no cuts for the forward assist. No big deal. Fits Tight with the Anderson lower I put it on with.

Rail seems to be decent quality and all mounting screws are tight and secure. Top rail is inline with flat top on receiver, no canting.

Overall pleased with the quality for the amount of money I paid. I'll report back after I take it out and sight it in this weekend.

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  0 of 1 people found the following review helpful:
Love it! July 17, 2016
Reviewer: Anonymous Person from Pagosa springs , CO United States  
I finally got a chance  to  shoot  my new build today.  First rounds were on a 10" gong at 25 yards with no bore sight.  I was surprised  to be able to hit the same 10" gong easily at 100 yards with magpul  mbus sights.  Not bad for a 8.5" barrel!  I ran a total of 50 rounds without a hiccup. This upper has excellent  fit and is apparently reliable.  Ship time was about 2 weeks, so it was faster than the advertised lead time of 6.  I'll be ordering  more, I hope I have the same positive  experience  on the next ones.

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  2 of 2 people found the following review helpful:
Great upper, production time is inaccurate. July 7, 2016
Reviewer: Michael from Dallas, TX United States  
This is a flawless fit on my aero lower.  Shoots great and the fail zero bcg is a breeze to clean.  My only complaint is that the production time listed at 8 weeks is wildly inaccurate.  Do not order this if you are expecting it anytime soon.  My order took over 11 weeks and communication with radical left a lot to be desired.  I believe that radical prioritizes sales made to other companies over sales made to individuals and thus, if you want a radical upper, it would be in your best interest to buy one from another vendor that already has it in stock.

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  0 of 0 people found the following review helpful:
Works flawlessly March 31, 2016
Reviewer: Jason from Centralia, WA United States  
This upper works great.
Getting great groups with it, better then i though possible with this length of barrel.
Fit to my lowers well, snug but not so much that i needed punches to get it on and off. which to me is a perfect fit.
Their Rails is also really solid. I like how it leafs back into the upper receiver body. this gives it no room to wiggle on the threads no mater how hard it is twisted on.
I will most certainly be recommending radical firearms to friend.

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  2 of 2 people found the following review helpful:
BEST DEAL ANYWHERE, PERIOD!!! February 11, 2016
Reviewer: Cody from North Georgia, United States  
Caught this thing for $199 at their thanksgiving sale, what a STEAL that was. Packaged very nicely, and once your build is complete they ship it fast!! Do not let the low price scare you away, this company is going to get bigger and bigger and you wont be able to buy these for so cheap for long! i personally have seen their build times go from 3 weeks to 8!!! This is the best deal in a .300 pistol upper anywhere, locks up nice and tight with a PSA lower and shoots like a dream. Unsuppressed i have had ZERO malfunctions with supersonic loads, and suppressed i have had ZERO malfunctions with subsonic loads!

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