CMMG AR-15 Barrel Sub-Assembly, .350 Legend 16.1in 4140CM Salt Bath Nitride, 1/2x28 35D5F0A

Product Description

CMMG’s Barrel Sub-Assembly is built for builders who want a durable, accurate AR-15 upper foundation in hard-hitting .350 Legend. This 16.1-inch barrel is made from 4140 chromoly steel and treated with a black nitride (salt bath nitride) finish for corrosion resistance and long service life. It features a carbine-length gas system with a medium taper profile, and arrives with a properly installed M4 barrel extension to support reliable fitment and performance in compatible AR-15/Mk4 upper assemblies.

Product Highlights

• 16.1-inch .350 Legend AR-15 barrel sub-assembly ideal for custom builds or barrel replacement
• 4140 chromoly steel construction with black nitride (salt bath nitride) finish for enhanced durability
• Carbine-length gas system with medium taper profile for balanced handling
• Threaded muzzle (1/2x28) and 1:16 twist rate to match common .350 Legend setups
• Includes properly installed M4 barrel extension; factory headspaced (per published specs)

Specs

• Brand: CMMG
• Manufacturer Part Number: 35D5F0A
• UPC: 816422027477
• Caliber/Chamber: .350 Legend
• Barrel Length: 16.1 in
• Material: 4140 chromoly steel
• Finish: Black nitride / salt bath nitride (matte black)
• Gas System Length: Carbine
• Profile: Medium taper
• Twist Rate: 1:16
• Muzzle Thread: 1/2x28
• Gas Journal Diameter: 0.750 in
• Platform Compatibility: AR-15 (CMMG Mk4/AR-15 uppers)
• Barrel Extension: M4 (installed)

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