CMMG AR-15 Barrel Sub-Assembly, 16.1in .300 Blackout 4140CM Nitride, Medium Taper 30D120A

SKU: FLX-3190

Vendor CMMG
Regular price $210.98
Sale price $210.98 Regular price $224.95
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Product Description

The CMMG Barrel Sub-Assembly is a high-quality option for building or refreshing a custom AR-15 upper group. Chambered in .300 Blackout with a 16.1-inch 4140 chromoly steel barrel and a durable black nitride (salt bath nitride) finish, it’s designed for reliable performance and long service life. This barrel sub-assembly includes a properly installed M4 barrel extension and is properly headspaced to help streamline your build.

Product Highlights

  • 16.1" .300 Blackout AR-15 barrel sub-assembly for custom upper builds and replacements
  • 4140 chrome molybdenum steel construction with black nitride (salt bath nitride) finish inside and out
  • Medium taper barrel profile with carbine-length gas system for balanced handling
  • Threaded 5/8-24 muzzle and .750" gas journal to fit common muzzle devices and gas blocks
  • Properly installed M4 barrel extension; factory headspaced for simplified assembly

Specs

  • Brand: CMMG
  • Manufacturer Part Number: 30D120A
  • UPC: 815835016238
  • Caliber/Chamber: .300 Blackout (.300 AAC Blackout)
  • Barrel Length: 16.1" (16.10")
  • Material: 4140 Chrome Molybdenum (Chromoly) Steel
  • Finish: Black Nitride / Salt Bath Nitride (inside and out)
  • Barrel Profile: Medium Taper
  • Gas System Length: Carbine
  • Gas Block Journal Diameter: .750" (0.75")
  • Twist Rate: 1:7
  • Muzzle Threads: 5/8-24
  • Barrel Extension: M4 (installed)
  • Headspaced: Yes (properly headspaced)
  • Weight: 1.5 lb

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