Radical Firearms AR-15 Rifle 16" .458 SOCOM - 15" M-LOK MHR Rail

Manufactured by Radical Firearms
SKU: FR16-458SOC-15MHR3
MPN: FR16-458SOC-15MHR
Manufactured by Radical Firearms
2 Reviews

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Items that are regulated by the ATF have restrictions and requirements: 
β€’Your entire order will ship only to a Federal-Firearm License holder.
β€’Please contact your local FFL prior to placing your order to ensure they are still accepting transfers.
β€’A copy of your order/invoice as well as the current FFL license for your local dealer must be emailed to ffl@primaryarms.com.



458 SOCOM is an extremely versatile hunting round with a large variety of ammunition to choose from. If you are looking to get into the big bore semi-automatic hunting game, ensure you get a rifle that can run it all. This Radical Firearms 458 SOCOM AR-15 comes with all you need for a successful hunt. The 16” barrel is the perfect length for optimal muzzle velocity and the 1:14 twist rate is great for stabilizing heavy hunting rounds. The .458 caliber barrel is made from 4150 chrome moly vanadium steel and has a Melonite finish for long lasting performance. Outfitted to the end of the barrel is the Radical Firearms Panzer muzzle brake to help reduce felt recoil for fast follow shots. Surrounding the HBAR profile barrel is a 15” Radical Firearms free float MHR rail that offers plenty of customization options for your favorite attachments. Whether you want to attach iron sights to the integrated picatinny rails or install a quick detach light to one of the many M-LOK slots, this handguard has you covered. This affordable big bore AR-15 is a great option for taking on your first hog hunt.

  • 16” 4150 chrome moly vanadium barrel with Melonite finish
  • Melonite coated and magnetic particle inspected BCG
  • 15” Radical Firearms MHR handguard with M-LOK slots
  • Radical Firearms Panzer muzzle brake
  • Carbine length gas system
  • Oversized ejection port
  • 6 position Adaptive Tactical stock
  • 7075-T6 forged aluminum receivers
  • Type III hardcoat anodizing
  • Includes aluminum magazine
  • Made in Stafford Texas, U.S.A.

The Radical Firearms 458 SOCOM AR comes with many enhanced parts in the lower receiver. It features an ambidextrous safety selector, so you can manipulate your rifle from either side and an ergonomic Mission First Tactical pistol grip. The magazine release and bolt release are also extended to make it easier to reach for easy mag changes, allowing you can get back on target faster. The carbine length buffer tube is equipped with an Adaptive Tactical stock that is adjustable between six positions, so you can customize it to your length of pull. The 458 upper and lower receivers are forged from 7075-T6 aluminum and feature a type III hardcoat anodization for increased wear resistance. All you need is your favorite optic and you are ready to get sighted in at the range.

Radical Firearms offers law enforcement grade hardware. Crafted with quality materials and covered by their lifetime warranty, Radical Firearms is an outstanding choice for any budget.
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Barrel Coating
Barrel ContourHBAR
Barrel Length16
Barrel LiningMelonite
Barrel Material41V50 Chrome Moly Vanadium Steel
BrandRadical Firearms
Caliber Gauge.458 SOCOM
Gas System LengthCarbine
Gas System TypeDirect Impingement
Handguard15 in M-LOK Rail
Muzzle DeviceMuzzle Brake
Twist Rate1:14

WARNING: This product can expose you to chemicals including Nickel Acetate, which is known to the State of California to cause cancer. For more information, see www.p65warnings.ca.gov

California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to www.P65Warnings.ca.gov.

Ratings & Reviews

2 reviews

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Radical Arms Socom .458 Purchase

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I have built and still own 12 AR's of various calibers and configurations. I purchased the Radical Arms Socom .458 to ad a big bore AR for hunting hogs in Texas. I picked it up from my FFL today and I am really impressed with the quality and workmanship in this AR. I could not build one better than this one. The pivot pins were both smooth and easy to break down. The attention to detail was very impressive and the trigger pull was better than most of the stock AR systems I have tried. I have drop in triggers on all my ARs but plan to leave this one alone. Very happy with my purchase. I will repost after taking it to the range but from what I see it should shoot as good as it looks! It even has a double ambi safety on it!

My gun


Just got my radical firearms.458 amazing gun built amazing shoots amazing definitely worth it