Faxon Firearms Duty Series Gunner Complete AR-15 Upper Receiver - 5.56 - 16"

The Faxon Firearms Duty Series Gunner Complete AR-15 Upper Receiver in 5.56 at 16" pairs a Gunner-profile barrel with a fixed low-profile gas block and standard A2 flash hider, a straightforward mid-length build ready to mount on any mil-spec lower.

Features:

• 16" Duty Series Gunner-profile barrel chambered in 5.56 NATO
• Mid-length stainless steel gas system
• Fixed low-profile gas block
• A2 flash hider
• 15" free-float aluminum M-LOK handguard
• Faxon Enhanced Forged AR-15 upper receiver
• Bolt carrier group and charging handle included

The Gunner barrel profile balances front-end weight against the rigidity needed for sustained firing, and the mid-length gas system smooths recoil impulse compared to a carbine-length setup on the same 16" barrel. This configuration uses a fixed gas block and standard A2 flash hider rather than a suppressor-tuned setup — see Faxon's Suppressor Ready Duty Series Gunner variant if you need an adjustable gas block and Plan B-compatible muzzle device.

This upper installs on any mil-spec AR-15 lower with no modification required, and it's a solid choice for a general-purpose 5.56 carbine build where suppressor use isn't part of the plan.

Faxon Firearms manufactures and assembles every barrel in-house at its Cincinnati, Ohio facility, keeping quality control in-house from rifling through final inspection.