8.6 Blackout Bolt Action Barrel Premium Stainless



  • Barrel Length *

  • If you need a custom length let us know! When ordering choose the barrel that is closest to the size you are looking for. Give us the details and we will be in touch!

  • Twist Rate *

    The infamous 1:3 Twist Rate, or if you are concerned about stabilizing ammunition we offer a 1:6.5 twist.

  • Bolt Action Manufacturer *

    If your action isn't listed let us know who the manufacturer is. You can contact us by phone, or e-mail. We want to ensure that you get what you need. Phone (480) 440-1878 E-mail aaron@mos-tek.com

  • Barreling to Your Action *

  • Add a Barrel Nut!


  • Crown/Muzzle *

Barrel Taper

  • Taper *

    The "Official Q" Taper specifically for the 8.6 Blackout Barrel. Sig/Q Taper is the standard taper offered on other "Q" and Sig barrels.

Barrel Finish

Adding Nitride or Cerakote to your barrel will extend your lead time out 2-4 weeks depending on our vendor lead time.

  • Barrel Finish Options *

  • Cryogenics will add 2 weeks to your barrel lead time.

  • Carbon Fiber will reduce the weight of your barrel by 30%, without compromising performance. This process will add 4-6 weeks to your lead time.


  • If you are shipping something to us using USPS please use the PO Box information off of the site. If you are shipping UPS or FedEx please use the address below MOS-Tek 9743 E. Impala Ave. Mesa, AZ 85209 Please call if you have any questions regarding this. Thanks!

Current Lead Times

  • We won't over promise and under deliver...We'd rather send your barrel to you early, then have it be past our estimated lead time...so you never know, it might be an early Christmas before you know it!


  • Comments *

    What Do We Need to Know? Give Us the Details!Max: 2500 characters

8.6 Blackout Bolt Action Barrel Premium Stainless$405.00
Barrel Length -
Custom Length - $25.00
Twist Rate -
Bolt Action Manufacturer -
Barreling to Your Action -
Barrel Nut - $45.00
Crown/Muzzle -
Barrel Taper
Taper -
Barrel Finish
Barrel Finish Options -
Cryogenics - $120.00
Carbon Fiber - $325.00
Shipping Instructions -
Current Lead Times
Lead Times are Currently 14+ Weeks -
Comments -

Product total

Options total

Grand total


8.6 Blackout Bolt Action Barrel Premium Stainless

MÔS-Tek’s version of the 8.6 Blackout Custom Premium Barrel Stainless

Match Grade
416R Stainless
5 R Rifling
1:3 Twist Rate

8.6 Blackout (8.6 BLK) is a centerfire rifle cartridge that uses a shortened casing from the 6.5 Creedmoor.  It is designed to be used in Bolt Action rifles or as an AR10 or AR308 rifle.  It uses the 1:3 Twist Rate and can be utilized as a supersonic or subsonic cartridge.

What’s the big deal with the 1:3 twist rate? This monumental 1:3 twist greatly enhances the energy of the large 8.6 BLK round.  

If you like .308 then what the 8.6 will give you is more energy.  It’s specifically designed for short barrels.  With an expanding 350 grain bullet, accurate to 300 yards, it hits hard.  If you want a lightweight gun that can be extremely quiet, and bring down big (we’re talking BIG) animals then the Blackout is most likely for you.

Like the 300 Blackout the 8.6 Blackout 1:3 Twist is designed primarily for suppressed shooting.  For the super-sonic shooter however, there are loads being developed.

Having been dubbed as the 300 Blackouts “Bigger Brother” primarily due to the 300 Blackout catering to the AR15 market.  The 8.6 BLK will be available in the AR10/.308 as well as a bolt gun platform.  Larger = Better right?

The skeptics that thought the 8.6 Blackout 1:3 Twist was never going to come to practical fruition are taking a seat and taking notes as it finds it’s place among the up and coming hunting cartridges. The 8.6 BLK 1:3 Twist has made it’s presence known and will be around now for the duration!

Welcome to the family 8.6 BLK 1:3 Twist, pull up a chair.

Additional information

Weight 4 lbs
Dimensions 20 × 2 × 2 in


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