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Radical Firearms Complete Upper Assembly 16in 458 SOCOM w/ Panzer Brake

Radical Firearms Complete Upper Assembly 16in 458 SOCOM ,.936, 1/14 Twist, 12in MHR, M-LOK, Panzer Brake, Black, CFU16-458SOC-12MHR
Radical Firearms Complete Upper Assembly 16in 458 SOCOM ,.936, 1/14 Twist, 15in MHR, M-LOK, Panzer Brake, Black, CFU16-458SOC-15MHR
Radical Firearms Complete Upper Assembly 16in 458 SOCOM ,.936, 1/14 Twist, 15in MHR, M-LOK, Panzer Brake, Black, CFU16-458SOC-15MHR
Radical Firearms Complete Upper Assembly 16in 458 SOCOM ,.936, 1/14 Twist, 15in MHR, M-LOK, Panzer Brake, Black, CFU16-458SOC-15MHR
Radical Firearms Complete Upper Assembly 16in 458 SOCOM ,.936, 1/14 Twist, 15in MHR, M-LOK, Panzer Brake, Black, CFU16-458SOC-15MHR
Radical Firearms Complete Upper Assembly 16in 458 SOCOM ,.936, 1/14 Twist, 15in MHR, M-LOK, Panzer Brake, Black, CFU16-458SOC-15MHR
Radical Firearms Complete Upper Assembly 16in 458 SOCOM ,.936, 1/14 Twist, 12in MHR, M-LOK, Panzer Brake, Black, CFU16-458SOC-12MHR
1 of 6 images
Radical Firearms Complete Upper Assembly 16in 458 SOCOM ,.936, 1/14 Twist, 12in MHR, M-LOK, Panzer Brake, Black, CFU16-458SOC-12MHR
Radical Firearms Complete Upper Assembly 16in 458 SOCOM ,.936, 1/14 Twist, 15in MHR, M-LOK, Panzer Brake, Black, CFU16-458SOC-15MHR
2 of 6 images
Radical Firearms Complete Upper Assembly 16in 458 SOCOM ,.936, 1/14 Twist, 15in MHR, M-LOK, Panzer Brake, Black, CFU16-458SOC-15MHR
Radical Firearms Complete Upper Assembly 16in 458 SOCOM ,.936, 1/14 Twist, 15in MHR, M-LOK, Panzer Brake, Black, CFU16-458SOC-15MHR
3 of 6 images
Radical Firearms Complete Upper Assembly 16in 458 SOCOM ,.936, 1/14 Twist, 15in MHR, M-LOK, Panzer Brake, Black, CFU16-458SOC-15MHR
Radical Firearms Complete Upper Assembly 16in 458 SOCOM ,.936, 1/14 Twist, 15in MHR, M-LOK, Panzer Brake, Black, CFU16-458SOC-15MHR
4 of 6 images
Radical Firearms Complete Upper Assembly 16in 458 SOCOM ,.936, 1/14 Twist, 15in MHR, M-LOK, Panzer Brake, Black, CFU16-458SOC-15MHR
Radical Firearms Complete Upper Assembly 16in 458 SOCOM ,.936, 1/14 Twist, 15in MHR, M-LOK, Panzer Brake, Black, CFU16-458SOC-15MHR
5 of 6 images
Radical Firearms Complete Upper Assembly 16in 458 SOCOM ,.936, 1/14 Twist, 15in MHR, M-LOK, Panzer Brake, Black, CFU16-458SOC-15MHR
Radical Firearms Complete Upper Assembly 16in 458 SOCOM ,.936, 1/14 Twist, 15in MHR, M-LOK, Panzer Brake, Black, CFU16-458SOC-15MHR
6 of 6 images
Radical Firearms Complete Upper Assembly 16in 458 SOCOM ,.936, 1/14 Twist, 15in MHR, M-LOK, Panzer Brake, Black, CFU16-458SOC-15MHR

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Questions & Answers
Is the flash hider removable and is the barrel threaded at 5/8x32? Expert Answer

These include Radical's Panzer Brake which is removable. The muzzle threading is 5/8x32.

by Jonathan D., Gear Expert, June 5, 2019
View All Q&A You Have a Question? Ask!
Customer Reviews
Helpful Positive Review
Stick with your mouse 223 by Steve, October 14, 2022
I've had the 16" 458 for roughly 8 years now. I've puts 100s of 300gr and 325gr bullets through it. It did have a break in period of about 25 rounds but after that everything ran smooth. This upper is a blast, if you take the time to make it run.
2/3 found this helpful
Helpful Negative Review
POS Same problems as others. by Bill, April 2, 2024
Discovered that it is not spec'd correctly. Jams most every time and exceedingly hard to remove some cases. Waited too late to shoot it, so too late to return. Optics Planet should not carry not carry products with obvious flaws.
1/1 found this helpful
Most Recent Reviews
Not recomended by coe, July 25, 2019
Bought this upper in November and just tried it out.... Bolt jams every other round, rod down the barrel to remove the case.... Some shells won't load.... Very disappointed and to late to return....wasted 500.00 dollars
10/12 found this helpful
Most Recent Reviews
Absolutely lousy Quality Control by Robert De Salvo, April 22, 2021
To begin with, the BCG that came with my upper was so sloppily put together, it absolutely had to been made overseas! I was able to remove the gas key very easily, despite the staking. Like the other reviewer, it's too late for a refund. I might be a...
Read More...
5/5 found this helpful
Read All 4 Reviews

Product No Longer Available

Unfortunately Radical Firearms Complete Upper Assembly 16in 458 SOCOM w/ Panzer Brake is not listed by OpticsPlanet.You can also explore other items in the Gun Parts, AR 15 Parts, Rifle Parts, AR15 Upper Receivers yourself to try and find the perfect replacement for you!

ATTENTION! We currently do not ship this product to P.O. Boxes, AK, CA, CT, DE, HI, MA, NJ, NY, U.S. Territories, or select Colorado locations. Please see our policies for more information or a detailed list of locations.

Product Info for Radical Firearms Complete Upper Assembly 16in 458 SOCOM w/ Panzer Brake

Craft an exceedingly powerful rifle when you incorporate this Radical Firearms Complete Upper Assembly 16in 458 SOCOM w/ Panzer Brake into your firearm setup. These AR15 Upper Receivers built by Radical Firearms arrive at your doorstep complete and assembled so you don't have to waste any more time and money fidgeting around with various parts. The Radical Firearms 458 SOCOM Complete Upper Assembly Kit comes complete with the upper receiver, forward assist, custom ejection port door, barrel nut, 16in 458 SOCOM barrel, and a Panzer Muzzle Brake. With integrated Keymod attachment points on the sides and bottom and Picatinny rails at the fore end, you can mount optics, lights, lasers and bipods to you rifle for maximum customization. Completed with some of the most durable gun parts available, the Radical Firearms 16in 458 SOCOM Complete Upper w/ FHR is your solution for a dependable firearm that will deliver tighter groupings and repeatable results every time.image

Features of Radical Firearms Complete Upper Assembly 16in 458 SOCOM w/ Panzer Brake:

  • 16in 458 SOCOM 4140V Steel Barrel
  • 1 in 14in Twist Rate
  • 5/8x32 TPI
  • 458 SOCOM Chamber
  • Single Feed Ramp
  • .936in Micro Gas Block
  • Stainless carbine-length gas tube
  • Direct Gas Impingement
  • Radical Firearms Panzer 5/8x32 Brake
  • Radical Firearms 12in FHR Hybrid Rail System
  • Integrated Keymod attachment points on the sides and bottom with Picatinny Rails at the fore end for Mounting Lights, Lasers, Bipods & Sights
  • Custom Forged Upper Receiver with RF Dimpled Forward Assist, Shell Deflector, Dust Cover
  • Complete 458 SOCOM BCG, MPI, Melonite Coated, Staked
  • MIL-STD Charging Handle
  • Big Bore Magazine

Package Contents:

  • Radical Firearms Complete Upper Assembly 16in 458 SOCOM w/ Panzer Brake

Ammunition

1–12 / 12
Previous
Wilson Combat X-Treme .458 SOCOM 300 Grain Round Nose Flat Point Brass Cased Pistol Ammo, 20 Round, A458-300-RNFP-20RD
Wilson Combat X-Treme .458 SOCOM 300 Grain Round Nose Flat Point Brass Cased Pistol Ammo, 20 Round, A458-300-RNFP-20RD
(4)
List: $54.95 (Save $3.46)
$51.49
$2.57/Round
Freedom Munitions Big Grains .458 SOCOM 300 Grain RNFP Brass Rifle Ammo, 20 Rounds, FMBG458SRF300N20
Freedom Munitions Big Grains .458 SOCOM 300 Grain RNFP Brass Rifle Ammo, 20 Rounds, FMBG458SRF300N20
(1)
List: $49.49 (Save 19%)
$39.99
$2.00/Round
Wilson Combat Hornady .458 SOCOM 300 Grain Hollow Point Brass Cased Pistol Ammo, 20 Round, A458-300-HP-20RD
Wilson Combat Hornady .458 SOCOM 300 Grain Hollow Point Brass Cased Pistol Ammo, 20 Round, A458-300-HP-20RD
(1)
List: $57.95 (Save 12%)
$51.09
$2.55/Round
Best Rated
Underwood Ammo .458 SOCOM 350 Grain Full Metal Jacket Brass Cased Rifle Ammo, 20 Rounds, 461
Underwood Ammo .458 SOCOM 350 Grain Full Metal Jacket Brass Cased Rifle Ammo, 20 Rounds, 461
(5)
List: $78.49 (Save 40%)
$46.99
$2.35/Round
Underwood Ammo .458 SOCOM 300 Grain Jacketed Hollow Point Brass Cased Rifle Ammo, 20 Rounds, 410
Underwood Ammo .458 SOCOM 300 Grain Jacketed Hollow Point Brass Cased Rifle Ammo, 20 Rounds, 410
(2)
List: $80.52 (Save 29%)
$56.99
$2.85/Round
HSM 458SOCOM1N Bear Load 458 SOCOM 350 Gr Jacketed Flat Point JFP
HSM 458SOCOM1N Bear Load 458 SOCOM 350 Gr Jacketed Flat Point JFP
List: $90.75 (Save 21%)
$71.99
$3.60/Round
Cor Bon Self Defense .458 SOCOM 300 Grain Jacketed Hollow Point Rifle Ammo, 20 Round, 458300
Cor Bon Self Defense .458 SOCOM 300 Grain Jacketed Hollow Point Rifle Ammo, 20 Round, 458300
List: $71.99 (Save $6.00)
$65.99
$3.30/Round
Wilson Combat Hornady .458 SOCOM 250 Grain MonoFlex Brass Cased Rifle Ammo, 20 Round, A458-250-MFX-20RD
Wilson Combat Hornady .458 SOCOM 250 Grain MonoFlex Brass Cased Rifle Ammo, 20 Round, A458-250-MFX-20RD
$85.49
$4.27/Round
Wilson Combat Hornady .458 SOCOM 350 Grain Soft Point Brass Cased Pistol Ammo, 20 Round, A458-350-SP-20RD
Wilson Combat Hornady .458 SOCOM 350 Grain Soft Point Brass Cased Pistol Ammo, 20 Round, A458-350-SP-20RD
List: $76.99
$76.49
$3.82/Round
Wilson Combat Lehigh Defense XD .458 SOCOM 250 Grain Fluid Transfer Monolithic Brass Cased Rifle Ammo, 20 Rounds, LA458-250-XD
Wilson Combat Lehigh Defense XD .458 SOCOM 250 Grain Fluid Transfer Monolithic Brass Cased Rifle Ammo, 20 Rounds, LA458-250-XD
$110.99
$5.55/Round
Wilson Combat Lehigh Defense XP .458 SOCOM 302 Grain Fluid Transfer Monolithic Brass Cased Rifle Ammo, 20 Rounds, LA458-302-XP
Wilson Combat Lehigh Defense XP .458 SOCOM 302 Grain Fluid Transfer Monolithic Brass Cased Rifle Ammo, 20 Rounds, LA458-302-XP
$111.99
$5.60/Round
Fort Scott Munitions .458 SOCOM 300 Grain Tumble Upon Impact Brass Rifle Ammunition, 20 Round, 458-300-SCV2
Fort Scott Munitions .458 SOCOM 300 Grain Tumble Upon Impact Brass Rifle Ammunition, 20 Round, 458-300-SCV2
List: $98.99 (Save 34%)
$65.49
$3.27/Round
Next

Ammo Boxes

1–1 / 1
Previous
MTM Deluxe Ammo Box 100 Round Handle, WSM WSSM Ultra Mag, Clear/Blue, R-100-MAG-24
MTM Deluxe Ammo Box 100 Round Handle, WSM WSSM Ultra Mag, Clear/Blue, R-100-MAG-24
(2)
List: $29.99 (Save $2.40)
$27.59
Next

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Radical Firearms Complete Upper Assembly 16in 458 SOCOM w/ Panzer Brake Unavailable & Discontinued Models

List of Unorderable Models

  • Radical Firearms Complete Upper Assembly 16in 458 SOCOM ,.936, 1/14 Twist, 15in MHR, M-LOK, Panzer Brake, Black, CFU16-458SOC-15MHR , MPN: CFU16-458SOC-15MHR , UPC: 816903027217 , Code: 2CS-URC-CUA16-458SOC-15MHR
  • Radical Firearms Complete Upper Assembly 16in 458 SOCOM ,.936, 1/14 Twist, 12in MHR, M-LOK, Panzer Brake, Black, CFU16-458SOC-12MHR , MPN: CFU16-458SOC-12MHR , UPC: 816903024353 , Code: 2CS-URC-CUA16-458SOC-12MHR
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Last updated 2026-08-17 UTC.