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16″ Lightweight Barrel 5.56 mm

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Luth-AR 5.56 Lightweight 16″ barrel made from 4140 Chrome Moly with a 1-9 RH twist, 6 lands and grooves, M4 feed ramp. Installing a quality barrel is arguably the #1 way to improve your AR’s accuracy.

Lightweight 16″ Barrel

  • Available in 16″
  • 5.56 mm
  • 4140 Chrome Moly
  • Threaded Barrel — Thread Pitch 1/2 x 28
  • Gas Block Diameter .750
  • Gas Tube Length — Carbine
  • 1-9 RH Barrel Twist
  • 6 Lands and Groves
  • M4 Feed Ramp
  • Button Broached
  • Weight: 1 lb 12 oz

.556 mm




Lands and Grooves


Gas Block Required

.750 Diameter

Gas Tube Required

Carbine Length


4140 Chrome-Moly

Thread Pitch

1/2 x 28





Weight lbs

1.12 lbs

For best results we recommend following a break-in procedure. We recommend that you clean the chamber and bore after every round for the first 25 rounds. It should take approximately 200 rounds for optimum barrel accuracy. Please keep in mind that accuracy is dependent upon many factors such as bullet weight, powder load, etc. If you have any question regarding our procedure, please ask or give us a call.
Per ammunition guidelines it is not recommended to shoot 5.56mm in a .223 REM  barrel, which we support for best and safest use of our product.