Expo Arms 5.56 NATO Chrome Lined AR-15 Barrel - Enhanced Medium Profile - Mid-Length .0785" Port - 13.9"

The Expo Arms AR-15 Barrels are designed to give you a premium barrel at an affordable cost. This AR barrel is made from 4150 CMV steel and features a chrome lined bore to withstand high temperatures for a long barrel life. This 13.9” model features an enhanced medium contour with a mid-length gas system and .0785” port diameter for reliable function and softer recoil. Additionally, the .750 gas seat diameter is dimpled for securely attaching set screw gas blocks. The 1:7 twist rate is optimal for heavier 62 grain ammunition and the muzzle is threaded 1/2x28 for your favorite 5.56 muzzle device and is the perfect length for pinning and welding. If you are looking for a combat ready barrel that provides exceptional accuracy and reliability, you can’t go wrong with an Expo Arms M4 barrel.

Features:

• 13.9” Enhanced medium profile chambered in 5.56 NATO
• Mid-Length gas system with .0785” port diameter
• .750” dimpled gas block shelf
• Made from 4150 CMV steel
• Phosphate finish
• Chrome-lined chamber and bore
• 1:7 twist rate and 1/2x28 muzzle thread
• M4 feed ramps

Expo Arms offers top-quality MIL-SPEC AR-15 components at rock bottom prices. Made in the U.S.A. and covered by Expo’s Limited Lifetime Warranty against manufacturer defects, material or workmanship problems, and even normal wear and tear.