Primary Weapons Systems Mod 2 Rifles

Range Testing

Accuracy with both uppers was excellent. My best 100-yard group using the MK116 came from the Remington 77-grain Premier Match at just over 0.50 inches. Everything was under an inch at 100 yards using the bi-pod from a supported position. The MK107 was about as accurate at 50 yards using Black Hills 69-grain TMK, although the Barnes 70-grain TSX was just a bit tighter, but everything was under an inch. Anything off hand or even moving from 25 yards and closer was under 3 inches.

With the Law Tactical Gen3 folder installed and the buttsock folded away, the MK107 handily fit within the author’s Eagle Industries 3-day assault pack.
With the Law Tactical Gen3 folder installed and the buttsock folded away, the MK107 handily fit within the author’s Eagle Industries 3-day assault pack.

Moving out to longer ranges, both the Hornady 75-grain 5.56mm NATO and Black Hills 69-grain TMK were excellent, but it was the Remington 77-grain Premier Match that really shined. It matched the Tubb Reticle perfectly at my range’s density altitude of 6,500 feet. Starting at 100 yards engaging 12-inch steel at 200, 300 and 400 yards, hits in the center were almost boringly consistent. Stretching it out to 600 then 800 yards, it was a simple matter of reading the wind and holding on the proper number to get hits with the Remington. This is the third rifle used with this scope, and so long as things mate up it is about as simple as it gets.

Other Considerations

Shown with a Surefire RC2 suppressor attached,the MK116 was capable of 1/2-minute precision at 100-yards.
Shown with a Surefire RC2 suppressor attached,the MK116 was capable of 1/2-minute precision at 100-yards.

Working close range and in the shoot house the MK107 is incredibly handy. It fit nicely in my Eagle Industries 3-day assault pack. The CQB brake does a great job of sending blast forward, and it’s not unpleasant to shoot. In rapid fire you still get a pretty impressive fireball, but that is to be expected. Under slow fire conditions it does pretty well. Function was excellent with everything and working around the FJ was downright pleasant.

SureFire’s RC2 has quite a bit less back pressure than the initial offering, and it is readily noticeable. Turn the gas down a bit and you get very moderate gas pressure and solid ejection. It still runs when wide open, but brass is ejected forcefully with quite a bit of gas in your face. Zeroed with just the flash hider, adding the suppressor dropped point of impact about an inch.

All the new ambidextrous controls are well placed. There are three other similarly equipped lowers in my inventory and this configuration it the most intuitive. My left hand seemed to fall right on the release when shooting off hand, as did my trigger finger releasing the bolt on the right. Safety manipulation was also easy with a crisp release. Over the course of several hundred rounds with all varieties of ammunition both rifles functioned without issue.

The highly-configurable Mod2 handguard, featuring Picmod technology, allows both Picatinny and Keymod interfaces.
The highly-configurable Mod2 handguard, featuring Picmod technology, allows both Picatinny and Keymod interfaces.

Bottom Line

If you intend to us both uppers you will need to start with the MK107 rifle since it is the registered item (LE or not) and add the longer upper. All in all, it is a very handy setup that gets you from across the room to 800 meters, and that is about perfect for most any application.

I had no disappointments with the Mod 2 updates. They are excellent. Both uppers are accurate, reliable and soft shooting. Fit and finish are excellent, with tighter lines, a more precise fit and better ergonomics. They are lighter, stronger and more sleek. Ambidextrous controls are well placed and effective. Picmod is excellent. No rails to come loose. Just the bi-pod and a light for me on the MK116. The handguard stays thin and sheds weight. The bolt carrier uses a standard hole at the rear. No more keeping track of PWS specific extensions for the Law Tactical folder, as they are interchangeable now. PWS really stepped up the game here. If you want a piston rifle void of most issues that come with piston guns, take a hard look at the new PWS Mod 2 rifles. For more information, contact Primary Weapons Systems, Dept. OT; Tel.: (208) 344-5217; Web: www.primaryweapons.com

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