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  • 375 Socom Barrels, Uppers, & Parts

  • .375 SOCOM Complete Assembled Upper

.375 SOCOM Complete Assembled Upper

$37.29 $58.55
Description As of April 2026, allow 5-10 days for this item to be built and shipped. Comes standard with 6061 M4 style upper receiver, stainless barrel, flash hider, black carbon steel gas block, bolt/carrier and charging handle. Ready to fire on your lower. This unit comes standard with a Flash Hider but you may choose to Install a Muzzle Brake or Radial Comp instead of the standard Flash Hider.  Optional heavy duty Tromix 7075 billet upper receiver is also available. Available in 10.5″ (carbine gas system 1:10 twist), 17″ and 21″ barrel lengths with mid-length gas systems 1:12 twist, .750″ gas block journals, and 5/8-24 muzzle thread. SB 704 applies to all California sales – Must ship to FFL.
375 Socom Barrels, Uppers, & Parts

375 Socom Barrels, Uppers, & Parts

  • Tromix Big Bore Billet Upper Receiver 7075
    $69.01 $111.8
  • 375 SOCOM Barrel and Bolt Combo
    $42.76 $64.14
  • Economy AR-15 375 SOCOM Upper 17″ Lightweight – Blemished
    $54.24 $68.34
  • Economy AR-15 375 SOCOM Upper 10.5″ Lightweight – Blemished
    $52.78 $71.78
  • M4 Style Standard Big Bore Upper Receiver – Right Handed
    $51.91 $95
  • .375 SOCOM Complete Assembled Upper
    $37.29 $58.55
  • Builder’s Special .375 SOCOM
    $53.15 $73.88
  • Big Bore Upper Receiver – Skeletonized
    $63.89 $125.86
  • Complete Bolt Carrier Group – 458 SOCOM, 375 SOCOM, 450 Bushmaster
    $44.28 $75.72
  • Economy AR-15 375 SOCOM Upper 21″ Lightweight – Blemished
    $60.6 $107.26
  • 375 SOCOM Barrel Only
    $50.97 $98.88

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