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Radical Firearms 16 in. 458 SOCOM Upper Assembly

Radical Firearms Upper Assembly 16 inch 458 SOCOM (.936), 12 inch FHR, Black CFU16-458SOC-12FHR
Radical Firearms Upper Assembly 16 inch 458 SOCOM (.936), 15 inch FHR, Black CFU16-458SOC-15FHR
Radical Firearms Upper Assembly 16 inch 458 SOCOM (.936), 12 inch FHR, Black CFU16-458SOC-12FHR
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Radical Firearms Upper Assembly 16 inch 458 SOCOM (.936), 12 inch FHR, Black CFU16-458SOC-12FHR
Radical Firearms Upper Assembly 16 inch 458 SOCOM (.936), 15 inch FHR, Black CFU16-458SOC-15FHR
2 of 2 images
Radical Firearms Upper Assembly 16 inch 458 SOCOM (.936), 15 inch FHR, Black CFU16-458SOC-15FHR

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Questions & Answers
Can this upper this upper go on my ar10 308 lower? Featured Answer

458 socom ar's are made for the ar 15 platform. Same magazines and lower parts. THe only differences is the bolt, barrel and an enlarge ejection port.

by charliemac10, Verified Owner, July 22, 2018
See 1 More Answer
How much does the 12 inch upper weigh? Expert Answer

It weighs approximately 5.4 lbs.

by Jonathan D., Gear Expert, March 12, 2020
View All Q&A You Have a Question? Ask!
Customer Reviews
Helpful Positive Review
Radical Firearms 458 SOCOM upper by Kevin Shogren, Verified Owner, November 12, 2017
Looks well made, I had to de-grease it before use. The only issue I had, was it would not work on my M4 lower. Fortunately it looks ok on my A2 lower. Given a choice I would have used a mid-length gas system. I would give it 4.5 stars.
1/5 found this helpful
Helpful Positive Review
Awesome UPPER!!! by Bear, Verified Owner, October 17, 2017
This upper bolts right up to an AR15 lower and runs great. Also uses standard AR MAGS just is single stack. 30 round mag holds 10. Put about 100 rounds so far. Kick is not horrible but i did put a limbsaver kick pad on it. I would definitely buy ano...
Read More...
4/5 found this helpful
Helpful Positive Review
SWEET ADDITION TO MY COLLECTION by Marty Johns, Verified Owner, September 17, 2017
This is a very well pt together upper that comes ready to shoot minus sights. i like the fact that it comes with the BCG and charging handle. as of the time of writing this review i have not fired the 458 but i am looking forward to it.
2/4 found this helpful
Helpful Positive Review
Great product by Woody, November 28, 2017
Upper is just as advertised. Drop it on a low and start shooting. 300gr nozler are a half moa at a 100 yrds. The muzzle brake is great! No kick at all. Like Shooting a 243 off the bench. Very accurate.
2/8 found this helpful
Helpful Positive Review
458 socom upper by shooter, January 12, 2018
works great . 3/4 inch group @ 50 yards . feeds great no issues. muzzle brake works good not much recoil and fit lower well. that is all I can say . got it on sale would buy another for right price I shoot 300 grain hollow point hornady.
1/2 found this helpful
Helpful Positive Review
Good 458socom upper by RazorUSMC, Verified Owner, February 14, 2018
It was prices way lower than Radical Firearms sales it for on there website. I have shot it a bunch and it functions Flawlessly with all kinds of 458socom ammo. It is made by Radical Firearms so take that for what it's worth. I have not had any probl...
Read More...
2/4 found this helpful
Read All 26 Reviews

Product Discontinued by Manufacturer

Radical Firearms 16 in. 458 SOCOM Upper Assembly has been discontinued by Radical Firearms and is no longer available. Our product experts have helped us select these available replacements below.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 16 in. 458 SOCOM Upper Assembly

Introducing Radical Firearms 458 SOCOM Complete Upper. After a year of development, a few thousand rounds, and a pretty sore shoulder, we feel this is absolutely one of the best uppers we ever offered... This provides a high-quality upper for those looking for more POWER out of their rifle. Comes complete and assembled with Upper Receiver, Forward Assist, Custom Ejection Port Door, Barrel Nut. 16 inch 458 SOCOM Barrel and our new Panzer Muzzle Brake to take the bite out of the round. Bolt Carrier Group and Charging Handle come complete with this upper. 16 inch 458 SOCOM 4150 Vanadium Steel Barrel. 1 in 14 inch Twist Rate. 5/8x32 TPI. 458 SOCOM Chamber. HPT/MPI. Single Feed Ramp. Low Profile .936 inch Micro Gas Block. Stainless carbine-length gas tube. Direct Gas Impingement. Radical Firearms Panzer 5/8x32 Brake. Custom Forged Upper Receiver with Forward Assist, Shell Deflector. Complete 458 BCG, MPI, Melonite Coated, Staked. Mil-Spec Charging Handle.image

Package Contents:

  • Radical Firearms 16 in. 458 SOCOM Upper Assembly

Ammunition

1–12 / 12
Previous
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 39%)
$47.99
$2.40/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 $3.46)
$54.49
$2.72/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 35%)
$51.99
$2.60/Round
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: $87.47 (Save 27%)
$63.99
$3.20/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: $109.49 (Save 34%)
$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
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 12%)
$43.49
$2.17/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: $23.08
$22.39
Next

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Radical Firearms 16 in. 458 SOCOM Upper Assembly Unavailable & Discontinued Models

List of Unorderable Models

  • Radical Firearms Upper Assembly 16 inch 458 SOCOM .936, 15 inch FHR, w/BCG and CH, Black, CFU16-458SOC-15FHR , MPN: CFU16-458SOC-15FHR , UPC: 816903021109 , Code: 2CS-UFH-16458SO-CFU16-458SOC-15FHR
  • Radical Firearms Upper Assembly 16 inch 458 SOCOM .936, 12 inch FHR, w/BCG and CH, Black, CFU16-458SOC-12FHR , MPN: CFU16-458SOC-12FHR , UPC: 816903021093 , Code: 2CS-UFH-16458SO-CFU16-458SOC-12FHR
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Last updated 2026-07-02 UTC.