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Radical Firearms 8.5 in. 300 AAC Blackout Upper Assembly FU8.5-300HBAR-7FCR Caliber: .300 AAC Blackout, Barrel Length: 8.5 in, 31% Off w/ Free S&H

Radical Firearms Upper Assembly 8.5 inch 300 AAC HBAR Contour, 7 inch FCR, A2 FH, w/o BCG and CH, Black, FU8.5-300HBAR-7FCR
Radical Firearms Upper Assembly 8.5 inch 300 AAC HBAR Contour, 7 inch FCR, A2 FH, w/o BCG and CH, Black, FU8.5-300HBAR-7FCR
Radical Firearms Upper Assembly 8.5 inch 300 AAC HBAR Contour, 7 inch FCR, A2 FH, w/o BCG and CH, Black, FU8.5-300HBAR-7FCR
Radical Firearms Upper Assembly 8.5 inch 300 AAC HBAR Contour, 7 inch FCR, A2 FH, w/o BCG and CH, Black, FU8.5-300HBAR-7FCR
Radical Firearms Upper Assembly 8.5 inch 300 AAC HBAR Contour, 7 inch FCR, A2 FH, w/o BCG and CH, Black, FU8.5-300HBAR-7FCR
Radical Firearms Upper Assembly 8.5 inch 300 AAC HBAR Contour, 7 inch FCR, A2 FH, w/o BCG and CH, Black, FU8.5-300HBAR-7FCR
Radical Firearms Upper Assembly 8.5 inch 300 AAC HBAR Contour, 7 inch FCR, A2 FH, w/o BCG and CH, Black, FU8.5-300HBAR-7FCR
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Radical Firearms Upper Assembly 8.5 inch 300 AAC HBAR Contour, 7 inch FCR, A2 FH, w/o BCG and CH, Black, FU8.5-300HBAR-7FCR
Radical Firearms Upper Assembly 8.5 inch 300 AAC HBAR Contour, 7 inch FCR, A2 FH, w/o BCG and CH, Black, FU8.5-300HBAR-7FCR
2 of 6 images
Radical Firearms Upper Assembly 8.5 inch 300 AAC HBAR Contour, 7 inch FCR, A2 FH, w/o BCG and CH, Black, FU8.5-300HBAR-7FCR
Radical Firearms Upper Assembly 8.5 inch 300 AAC HBAR Contour, 7 inch FCR, A2 FH, w/o BCG and CH, Black, FU8.5-300HBAR-7FCR
3 of 6 images
Radical Firearms Upper Assembly 8.5 inch 300 AAC HBAR Contour, 7 inch FCR, A2 FH, w/o BCG and CH, Black, FU8.5-300HBAR-7FCR
Radical Firearms Upper Assembly 8.5 inch 300 AAC HBAR Contour, 7 inch FCR, A2 FH, w/o BCG and CH, Black, FU8.5-300HBAR-7FCR
4 of 6 images
Radical Firearms Upper Assembly 8.5 inch 300 AAC HBAR Contour, 7 inch FCR, A2 FH, w/o BCG and CH, Black, FU8.5-300HBAR-7FCR
Radical Firearms Upper Assembly 8.5 inch 300 AAC HBAR Contour, 7 inch FCR, A2 FH, w/o BCG and CH, Black, FU8.5-300HBAR-7FCR
5 of 6 images
Radical Firearms Upper Assembly 8.5 inch 300 AAC HBAR Contour, 7 inch FCR, A2 FH, w/o BCG and CH, Black, FU8.5-300HBAR-7FCR
Radical Firearms Upper Assembly 8.5 inch 300 AAC HBAR Contour, 7 inch FCR, A2 FH, w/o BCG and CH, Black, FU8.5-300HBAR-7FCR
6 of 6 images
Radical Firearms Upper Assembly 8.5 inch 300 AAC HBAR Contour, 7 inch FCR, A2 FH, w/o BCG and CH, Black, FU8.5-300HBAR-7FCR

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Questions & Answers
my black will fire but not load another round why. Expert Answer

We would highly recommend reaching out to Radical Firearms or techsales@opticsplanet.com with more details regarding exactly how your rifle is set up and what kind of ammo you are shooting because the cause could be a wide variety of issues that will have slightly different solutions.

by Armando R., Gear Expert, May 31, 2019
See 2 More Answers
What is the twist Expert Answer

The Radical Firearms 8.5 in. 300 AAC Blackout Upper Assembly features a 1:7 twist rate, pistol length gas system, and Hbar profile (8.5") barrel.

by Ethan, Gear Expert, August 29, 2022
View All Q&A You Have a Question? Ask!
Customer Reviews
Helpful Positive Review Nice shooting LITTLE piece of equipment by Sgtpbone, July 29, 2018
After opening the package it looked pretty good. I mounted it on a Sig pistol lower and went to the range. Things fed through it without an issue. For an inexpensive LITTLE piece of equipment it worked great.
3/3 found this helpful
Helpful Positive Review No issues with this upper by Ed, Verified Owner, October 15, 2018
I have been trying to shoot 300blk suppressed and this upper did just that. This upper has worked flawlessly with different types of ammunition both supersonic and subsonic (with a suppressor). It cycles properly each time regardless of the ammunit...
Read More...
3/3 found this helpful
Helpful Positive Review Solid for price by Chris, Verified Owner, November 11, 2018
Solid quality for the price. The barrel nut screws suck all though I mean they work but i can see the potential for stripping easily. Handrail was nice and slim. Very slim profile overall.Gas block is pinned which is awesome.
2/2 found this helpful
Helpful Positive Review 300 BLackout build by Dave, Verified Owner, March 29, 2019
Runs flawlessly with Remington 120 solid, Hornady 110 Vmax. Excellent accuracy using a Sig Romeo 5 at up to 50 yards. The only issue I have had is using Sellior and Bellot 220 grain subsonic which will not cycle more than once. I do not have a can o...
Read More...
5/5 found this helpful
Helpful Positive Review Excellent Upper by Brian, Verified Owner, November 9, 2019
1,200 rounds, no malfunctions. Running with a Spike’s Tactical BCG & Spike’s Tactical H2 Buffer. Paired with an Anderson lower. Functions perfectly. This is a great value without sacrificing performance. I would recommend to everyone.
7/7 found this helpful
Helpful Positive Review Not a bad little thing of metal... Decently impressed by JJ, November 19, 2019
I was surprised at how light it was when I originally picked it up. My entire pistol comes in at 4.5 Lbs. The rail is VERY sturdy and feels amazing. I also love the way it looks. My only complaint *so far* is the quality of the Allen screws on th...
Read More...
5/5 found this helpful
Read All 13 Reviews
Caliber: .300 AAC Blackout Barrel Length: 8.5 inMuzzle Device: A2 Flash Hider Finish: Matte Color: Black Additional Features: A2 FH, w/o BCG and CH

Code: 2CS-UFH-85AAC7-FU8-5-300HBAR-7FCR

MPN: FU8.5-300HBAR-7FCR

UPC: 816903025008

List: $309.95Save 31%
$214.94

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Receive $7.18 OP Bucks

Product Info for Radical Firearms 8.5 in. 300 AAC Blackout Upper Assembly

If you're looking for a law-enforcement grade upper receiver kit, the Radical Firearms 8.5 in. 300 AAC Blackout Upper Assembly is a full kit that comes with complete parts and is already assembled with the upper receiver, forward assist, ejection port door, barrel nut, 8.5in HBAR profile barrel, A2 flash hider, and a Forward Guard Shield (FGS) free-float handguard. Assembling a high quality rifle is easier than ever with these AR15 Upper Receivers by Radical Firearms due to its drop-in installation that is ready to be mounted to your AR-15 platform lower receiver instantly. The included FGS handguard with the Radical Firearms Blackout Upper w/ 7in FGS boasts a free-floating design that keeps your hands cool during multiple rounds of fire, doesn't interfere with your barrel, and provides multiple mounting options for additional attachments and optics. Unlike the grand majority of upper receivers on the market, these ones are tested to ensure that they will cycle with subsonic rounds. These receivers will impress both amateurs and professionals alike and are an incredible value for the quality they bring to the table. Complete your firearm with the Radical Firearms Blackout Full Upper Assembly for an incredible shooting experience at an amazing price.image

Specifications for Radical Firearms 8.5 in. 300 AAC Blackout Upper Assembly:

Manufacturer: Radical Firearms
Caliber: .300 AAC Blackout
Barrel Length: 8.5 in
Muzzle Device: A2 Flash Hider
Finish: Matte
Color: Black
Model: Slim Rail System (FCR)
Gun Rail: M-LOK
Additional Features: A2 FH, w/o BCG and CH
Magazine Included: No
Length: 7 in

Package Contents:

  • Radical Firearms 8.5 in. 300 AAC Blackout Upper Assembly

Radical Firearms 8.5 in. 300 AAC Blackout Upper Assembly Orderable Models

List of Orderable Models

Radical Firearms Upper Assembly 8.5 inch 300 AAC HBAR Contour, 7 inch FCR, A2 FH, w/o BCG and CH, Black, FU8.5-300HBAR-7FCR , MPN: FU8.5-300HBAR-7FCR , UPC: 816903025008 , Code: 2CS-UFH-85AAC7-FU8-5-300HBAR-7FCR

Radical Firearms 8.5 in. 300 AAC Blackout Upper Assembly Unavailable & Discontinued Models

List of Unorderable Models

Radical Firearms Upper Assembly 8.5 inch 300 AAC HBAR Contour, 7 inch FQR, w/o BCG and CH, Black, FU8.5-300HBAR-7FQR , MPN: FU8.5-300HBAR-7FQR , UPC: 814034024556 , Code: 2CS-UFH-85AAC7-FU8-5-300HBAR-7FQR
Radical Firearms Upper Assembly 8.5 inch 300 AAC HBAR Contour, 7 inch FHR, w/o BCG and CH, Black, FU8.5-300HBAR-7FHR , MPN: FU8.5-300HBAR-7FHR , UPC: 814034024570 , Code: 2CS-UFH-85AAC7-FU8-5-300HBAR-7FHR
Radical Firearms Upper Assembly 8.5 inch 300 AAC HBAR Contour, 7 inch FTR, w/o BCG and CH, Black, FU8.5-300HBAR-7FTR , MPN: FU8.5-300HBAR-7FTR , UPC: 814034024587 , Code: 2CS-UFH-85AAC7-FU8-5-300HBAR-7FTR
Radical Firearms Upper Assembly 8.5 inch 300 AAC HBAR Contour, 7 inch FQR, w/BCG and CH, Black, CFU8.5-300HBAR-7FQR , MPN: CFU8.5-300HBAR-7FQR , UPC: 816903020614 , Code: 2CS-UFH-85AAC7-CFU8-5-300HBAR-7FQR
Radical Firearms Upper Assembly 8.5 inch 300 AAC HBAR Contour, 7 inch FTR, w/BCG and CH, Black, CFU8.5-300HBAR-7FTR , MPN: CFU8.5-300HBAR-7FTR , UPC: 081690302063 , Code: 2CS-UFH-85AAC7-CFU8-5-300HBAR-7FTR
Radical Firearms Upper Assembly 8.5 inch 300 AAC HBAR Contour, 7 inch FHR, w/BCG and CH, Black, CFU8.5-300HBAR-7FHR , MPN: CFU8.5-300HBAR-7FHR , UPC: 816903020621 , Code: 2CS-UFH-85AAC7-CFU8-5-300HBAR-7FHR
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