Expo Arms Barreled AR-15 Upper Receiver - 5.56 - 16"

The Expo Arms Barreled AR-15 Upper Receiver gives AR-15 builders a complete, mid-length 16" 5.56 NATO upper ready to pair with any mil-spec lower, with a Government-contour barrel and Parkerized finish for a clean, traditional build.

Features:

• 16" Government-contour barrel chambered in 5.56 NATO, 1:7 twist
• 1/2x28 threaded muzzle with flash hider
• Mid-length direct-impingement gas system
• Parkerized barrel finish
• 15" free-float M-LOK handguard
• Bolt carrier group and charging handle not included

The mid-length gas system provides reliable dwell time across a wide range of ammunition while reducing felt recoil compared to a carbine-length system, and the 1:7 twist stabilizes projectiles from 55 to 77 grains, covering standard M193 loads through heavier match ammunition. The 15" M-LOK handguard provides accessory mounting across nearly the full barrel length in a free-float design, and the whole assembly installs on any standard mil-spec AR-15 lower with no modification required.

Add your preferred bolt carrier group and charging handle and this upper is ready to run.

The Parkerized finish adds an extra layer of corrosion resistance beyond the barrel's base coating, making this a durable choice for a range or duty carbine that sees regular use.

Expo Arms builds mil-spec AR-15 components exclusively for Primary Arms, backed by a limited lifetime warranty against manufacturer defects.