This WMD Guns upper assembly (brand part no. 1-NIBXUA300BO-16) is chambered in .300 AAC Blackout with a 16-inch barrel. WMD Guns brings together metallurgists, chemists, gunsmiths, and plating engineers to produce and plate its own firearms, chassis, and components in-house, alongside offerings from other top manufacturers, with many products made to order. This AR15 upper comfortably clears the federal rifle barrel-length minimum.

Key Specifications

• Chambered in .300 AAC Blackout.
• Barrel measures 16 inches.
• Sold as an upper assembly.
• Produced and plated in-house by WMD Guns’ own metallurgists and plating engineers.
• Many WMD Guns products are made to order.

Frequently Asked Questions

Does this include a lower receiver? No, this is an upper assembly only; a compatible AR-15 lower is not included.

Does the 16-inch barrel raise any NFA concerns? No, 16 inches clears the federal minimum rifle barrel length, so there’s no short-barreled-rifle concern when built as a rifle.

Buy the WMD Guns Upper Assembly, .300 Blackout, 16in Barrel

An in-house-plated WMD Guns upper brings the company’s metallurgy expertise to a .300 Blackout build. Order it from our Lubbock, TX gun shop for fast, insured shipping.