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PWS MK118 MOD2 Upper 6mm ARC
PWS MK118 MOD2 Upper 6mm ARC
 
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MSRP: $1,499.00

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Product Code: MK1-M2U6ARC-18-NC
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Description
 
The MK118 MOD2 Primary Weapons Systems upper in 6mm ARC features 18" barrel, 15" MLOK handguard, integrated front Picatinny rail sections, lightweight receiver, no forward assist, PWS long-stroke piston system and adjustable gas block.
Technical Specs
  • Caliber 6mm ARC
  • Fits milspec AR15 lowers
  • Duramag 6mm/6.5 AR15 mags recommended
  • 4lb 15oz weight as pictured
  • Lightweight receiver
  • Eliminated forward assist
  • 18 inch 41V50 CMV barrel
  • 1:7.5 twist threaded 5/8X24
  • No muzzle device - thread protector included
  • PWS mid-length long-stroke piston system
  • 3-position adjustable gas block
  • 15 inch MLOK handguard
  • Integrated front Picatinny rail sections
  • Radian Raptor LT charging handle
  • Limited lifetime warranty

Average Customer Review: Average Customer Review: 5 of 5 5 of 5 Total Reviews: 6  Write a review.

  0 of 0 people found the following review helpful:
 
5 of 5 PWS Mk118 Upper October 30, 2025
Reviewer: William Jobst from Saint Paul, MN  
Fast shipping. Upper was in perfect shape and easy to order.

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  0 of 0 people found the following review helpful:
 
5 of 5 Excellent for hard to find PWS October 30, 2025
Reviewer: Mark from Keene, NH  
I love PWS uppers, but they have been hard to find. Fortress has a great supply, and the order and delivery process is well done.

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  0 of 0 people found the following review helpful:
 
5 of 5 PWS MK118 MOD2 October 7, 2025
Reviewer: R Cameron Strickler from Harrisonburg, VA  
Great experience with Fortress Tactical. Fast shipping and great packaging. This is a very well-made upper. Just broke the barrel in, and it functions flawlessly with 15 round Duramags. Very clean and soft shooter, accurate as well.

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  0 of 0 people found the following review helpful:
 
5 of 5 Always a good experience September 29, 2025
Reviewer: Murad Babaniyazov from Vail, AZ  
As soon as I placed my order, Mike reached out to me because I forgot to put in a code for $200 discount. I have bought things from dozens of retailers, but I have never experienced the customer service as with Fortress Tactical.  As for the upper, I have yet to try it out. But, having owned 6 PWS uppers, I have a feeling this will perform just as advertised. Will update later.

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  0 of 0 people found the following review helpful:
 
5 of 5 Always a perfect transaction! March 14, 2025
Reviewer: David Brown from Birmingham, AL  
Mike, thanks again for information over and above what should be deemed sufficient when buying from Fortress! Quality of the 6ARC is fantastic! So glad PWS finally made the 6ARC! Maybe 6.5 Grendel next?! Thanks again, Mike!

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