AR-15 .458 Socom 10.5" pistol upper assembly / 10" Mlok / Linear Comp

.458 Socom

AR-15 .458 SOCOM 10.5" Pistol Upper Assembly w/ 10" Free Float Rail | Big Bore Power

The AR-15 .458 SOCOM 10.5" Pistol Upper Assembly offers compact power and big-bore performance, perfect for those seeking a pistol-length upper for their AR-15 platform. Designed with a 10" Free Float MLOK Rail, this upper assembly provides accuracy and customization while handling the powerful recoil of the .458 SOCOM cartridge. Ideal for shooters who need compact firepower without compromising durability.

Key Features:

• Barrel:

  • 10.5" 4150CMV Steel Barrel, designed for big bore performance.

  • Chambered in .458 SOCOM with a 1/14 RH twist, making it perfect for heavy .458 bullets.

  • Threaded 5/8x24 to accommodate the .458 SOCOM linear compensator.

  • .875" under gas block diameter and carbine-length gas system for reliable cycling.

  • Finished off with a Parkerized finish and a black linear compensator made from hardened steel to reduce recoil.

• Upper Receiver:

  • A3 flat top receiver, 7075-T6 aluminum forgings, hardcoat anodized to MIL-SPEC.

  • Forward assist and dust cover installed.

  • Designed specifically for big bore calibers to handle the power of the .458 SOCOM round.

• Gas System:

  • .875" low profile gas block, made from aircraft-quality steel for durability.

  • Carbine-length stainless steel gas tube for reliable cycling in any condition.

• Handguard:

  • 10" MLOK Free Float Rail for enhanced modularity and ease of accessory installation.

  • Constructed from aircraft-quality aluminum, black hardcoat anodized for superior strength and durability.

Important Notes:

• Does not include BCG or Charging Handle. These can be purchased separately at the top of the page.

• Made in the USA with precision craftsmanship and high-quality materials.

• Images may not be an exact representation 

  Compatible with Big Bore Mil Spec AR-15 Lower Receivers adjusted with 4.3 oz buffer for proper cycling.

  The AR-15 .458 SOCOM 10.5" Pistol Upper Assembly is built for big-bore enthusiasts seeking compact, high-performance upgrades for their AR-15 rifles. Featuring a Parkerized 10.5" barrel, .458 SOCOM chambering, MLOK free float rail, and linear compensator, it’s perfect for handling the heavy recoil of the .458 SOCOM round. Add power and reliability to your build.