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Q&A for Radical Firearms 16 in. 458 SOCOM Upper Assembly — 9 Questions & 9 Answers

Name Radical Firearms 16 in. 458 SOCOM Upper Assembly (2.7)
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Q
B-rock, member, from IN, United States, asked on July 15, 2018

Can this upper this upper go on my ar10 308 lower?

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A
Answered by charliemac10, member, from CO, United States, on July 22, 2018

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.

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Q
Siv, member, from AZ, United States, asked on February 18, 2020

How much does the 12 inch upper weigh?

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A
Answered by Jonathan D., Gear Expert, from IL, United States, on March 12, 2020

It weighs approximately 5.4 lbs.

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Dan, member, from TX, United States, asked on January 27, 2019

Where are the barrel and bolt carrier group made?

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A
Answered by Jonathan D., Gear Expert, from IL, United States, on June 03, 2019

They are manufactured in Texas by Radical.

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Q
Peckjustin, guest, from OK, United States, asked on January 01, 2019

Will i need a stronger buffer spring?

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A
Answered by Jonathan D., Gear Expert, from IL, United States, on June 03, 2019

It should work with a standard buffer spring.

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Q
Greg, guest, from NC, United States, asked on December 26, 2018

Are the large bore uppers compatable/suggested for use with polymer lowers such as Busmaster ORC carbines ?

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A
Answered by Jonathan D., Gear Expert, from IL, United States, on June 03, 2019

They will function with a polymer lower however we would recommend an aluminum lower.

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Q
Russ, member, from CA, United States, asked on December 24, 2018

Does it come with a big bore magazine?

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A
Answered by Jonathan D., Gear Expert, from IL, United States, on June 03, 2019

No, it does not.

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Q
charliemac10, member, from CO, United States, asked on July 22, 2018

What kind of steel is the barrel made of?

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A
Answered by Ethan C., Gear Expert, from IL, United States, on March 01, 2019

The barrel is made of 4140 CMV steel.

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Q
Spence, guest, from CA, United States, asked on March 27, 2018

Am I correct in understanding that this .458 SOCOM Upper includes the BCG and CH & Muzzle Brake. Is there Sales Tax for CALIF?

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A
Answered by ChadC8509, member, from AL, United States, on March 28, 2018

It says complete 458 BCG right in the description sp how would you not be correct! Did you not read it.

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Q
Charles, member, from IL, United States, asked on December 08, 2020

I don't specifically see the words free float, but the hand guard looks like a free floating. can anyone confirm?

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Last updated 2025-11-12 UTC.