AR15 5.56/.223 16″ M4 Carbine Front Line Barrel


Front Line 5.56/.223 16″ M4 Profile, Carbine Gas System, 1:7 or 1:9, phosphate finish

Product Description

Our entry-level Front Line™ series is everything you need in a quality, Duty-Rated™ firearm. Unlike cheap gun-show parts, our Front Line equipment meets or exceeds the performance standards required by professional law enforcement and military personnel for their duty weapons. By maintaining this minimum quality level even in our entry-level equipment, you can rest assured that your AO Sword Firearm will respond appropriately to your application of pressure to the bang switch.

All our Front Line barrels are high quality 4140 Chromoly high carbon alloy steel, button rifled, with precision gas porting to avoid the overgassed condition so common in today’s mass-market barrels. All AO Sword Front Line barrels are manufactured to our exacting design specifications in an ISO-certified facility, then shipped to our coating provider for phosphate treatment.

The 16″ M4 profile Front Line barrel is available in 1:9 and 1:7 twist rates. The M4 (Government) profile uses a carbine length gas system. All Front Line barrels have threaded muzzles.

Typical performance from our Front Line barrels is approximately 2 MOA. All Front Line barrels are chambered in 5.56mm, which safely accomodates .223cal rounds, as well.

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