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18″ Mark 12 Barrel 5.56 mm

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18″ Mark 12 Barrel 5.56 mm

Looking for that balance between weight and long distance accuracy? Our 18″ MARK 12 5.56 mm will fit the bill. Made from 410 Chrome Moly, 1-9 RH twist and an M4 style feed ramp.

$189.99

18″ Mark 12 Barrel 5.56 mm

  • Available in 18″
  • 5.56 mm
  • 4140 Chrome Moly
  • Threaded Barrel — Thread Pitch 1/2 x 28
  • Gas Block Diameter .750
  • Gas Tube Length — Rifle
  • 1-9 RH Barrel Twist
  • 6 Lands and Groves
  • M4 Feed Ramp
  • Button Broached
  • Weight: 2 lb 11 oz
Caliber

.556 mm

Overall Length

18"

Twist

1-9

Lands and Grooves

6

Threaded

Yes

Thread Pitch

1/2 x 28

Material

4140 Chrome-Moly

Finish

Phosphate

Color

Weight lbs

2.11

Gas Block Required

.750 Diameter

Gas Tube Required

Rifle Length

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.
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