10.5" 458 SOCOM "Baddie" AR-15 Complete Upper Receiver Group

Bexar Arms

MSRP: $954.00
Our Price: $925.00
(You save $29.00 )
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Thicc Boi Boolits.. Baddie Approved!

All NFA Rules and Regulations Apply.

A note from Phillip: This is the same Complete Upper Receiver Group that you've seen on Baddie's Twitch Stream! 458 SOCOM feeds from standard 5.56 magazines. We've found that high quality magazines with metal feed lips provide reliable feeding. Magazine brands such as Lancer, DuraMag, and OKAY Industries (SureFeed) in their standard 5.56 variety have worked well for us. Standard 30rd 5.56 mags typically hold 10 rounds of 458 SOCOM. For our URG, we recommend using an H3 buffer.

Upper Receiver

  • Aero XL Upper Receiver
  • Milled from 7075-T6 Forgings
  • Mil-Spec Black Hard Coat Anodized
  • Enlarged Ejection Port for Reliable Brass Ejection


  • Bexar Arms 9.7" eXcise Optimized
  • Mil-Spec Black Hard Coat Anodized
  • M-LOK Compatible
  • Steel Reinforced QD Sling Socket Inserts
  • 7075-T6 Barrel Nut

10.5" 458 SOCOM Barrel

  • Faxon 10.5" 4150 CMV 1-14T
  • Black Nitride Finished
  • 11/16x24 Threaded Muzzle
  • 11 Degree Target Crown
  • Polished Feed Ramp for Reliable Feeding
  • Dimpled for Rear Gas Block Set Screw

Muzzle Device

  • Tanker Style Muzzle Brake
  • 3 Side Ports, 2 Top Ports
  • 11/16x24 Threads
  • Black Nitrided Steel

.875 Gas Block

  • Low Profile 4140 Steel
  • Black Nitride Finish
  • Bexar Arms Knurled Cup Point Set Screws

Pistol Length Gas Tube

  • Mil-Spec 304 Stainless Steel

458 SOCOM Bolt

  • Bexar Arms 9310 Black Nitride 458 SOCOM Bolt
  • Bexar Arms Helical Gas Ring
  • Bexar Arms Black Nitride Firing Pin
  • Bexar Arms Inconel X750 Extractor and Ejector Spring
  • CRANE Spec Extractor O-Ring
  • Chamfered Ejector Pin for Reliable Feeding
  • Polished Bolt Face Edge for Reliable Feeding

Bolt Carrier

  • Bexar Arms Gauged and Inspected 8620 Black Nitride Bolt Carrier
  • Bexar Arms Gauged and Flattened 4140 Black Nitride Gas Key
  • OCKS Gas Key Screws
  • Heavy Dimple Staking
  • Gas Key Sealed to the Carrier w/ Permatex Red Gel
  • 4140 Black Nitride Cam Pin

Charging Handle

  • Aero BREACH Small Lever Ambi Charging Handle


  • Magpul Black M-LOK Hand Stop Kit