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18" 6.8 stainless 5R Helical flute
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If you are looking for a factory loaded AR  cartridge to hunt yotes, deer and hogs the 6.8 can't be beat in terminal performance. The exterior ballistics of the 6.8 and Grendel are within a few inches of each other all the way to 400yds. The 6.8 starts off 80-100fps faster with the same weight bullet and barrel length. The 6.8 has a great selection of usable hunting bullets. A 5.56 and a 6.8 could handle every possible need.

These 18" barrels are a great compromise and choice between the 16 and 20".  They aren't much heavier than the 16" and are 40-50fps faster.

Hi perf. chamber and barrel allow for ANY factory ammo to be used along with the hottest handloads. The throat/freebore is designed to be more accurate with a wider range of bullets than the typical SPCII chamber.

  • Chamber: 6.8 ARP(-similar to Wylde)accurized chamber.  It is NOT smaller than the 6.8 SPCII chamber.
  • Profile:  midweight-.Taper 840-745/.750/.700
  • Fluted: yes-Helical-flutes are bead blasted, barrel satin/sand  finish for a two tone look.
  • Barrel Length: 18"
  • Twist Rate: 1:11.25- Hybrid 5R rifling
  • Gas System: mid Length
  • Diameter at Gas Port: .750"
  • Muzzle Thread Pitch: 5/8x24
  • Material: 416 R stainless
  • Finish: SS satin/sand (not bead blasted)
  • Process: Button Rifled
  • Barrel Lining: SS
  • Barrel Extension: M4
  • Assembly: Stripped
  • Weight: 2lb 2oz

This is a complete barrel only, it does NOT include any other parts unless added below as an option.

Remington fmj ammo may not be powerful enough to cycle the action with a .086 gas port, call or note on order if  you plan to use this plinking ammo.

gas tube
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    (ARP) AR15 Performance LLC

    Key West, FL 33040

    Hi performance 5.56 & 6.8 SPC barrels and parts since 2007

    The best way to contact is by email

    Phone: 801-750-4216  8am-5pm eastern time  M- Fri only
    Sorry we do not export anything and do not have a storefront. Everything must be purchased online.

    6.8 SPC II, 5.56, 223 wylde, 30 Herrett, TAC 6,

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