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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
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
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...
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5/5 found this helpful
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2 Models Available
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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

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

Manufacturer: Radical Firearms
Caliber: .458 SOCOM
Barrel Length: 16 in
Barrel Twist Rate: 1-14
Muzzle Device: Panzer Brake
Finish: Anodized
Color: Black
Model: 12in Hybrid Rail System - MHR
Gun Rail: M-LOK
Additional Features: Panzer Muzzle Brake
Magazine Included: No
Length: 16 in

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

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

List of Orderable 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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