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Primary Weapons Systems MK109 MOD 2-M, .300 AAC Blackout, 9.75 inch Upper Receiver
$1,499.95
$1,399.95
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Most Helpful Positive Review
PWS Upper - Legit
PWS, has consistently impressed me with their build quality, reliability and accuracy. This is second upper I've purchased and they both outperform everything else on the range. Also, they never get dirty.
Pws 300 aac upper
The upper is the expected quality for a pws product, there was a little rust on the piston head and it took months to arrive so that’s why 4 stars not 5. I haven’t shot it yet but will soon and if it’s like the other pws items I’ve had it will be great.
Pros:
- Quality
Cons:
- Showed in stock but took months to ship
Best Used for:
- fun
Would recommend: Yes
Broken BCG after 3 uses
Unfortunately after 3 range sessions the bolts that hold the piston rod into the BCG became loose and cause the rod to break. This is poor QC and these bolts should be installed with loctite and torqued.
Would recommend: No
Excellent upper
Purchased this upper to build a truck gun. The size is perfect and very quiet with a Nomad can on it 220g subsonics. Shot very well with noticeable reduction in gas. I would definitely purchase this again and will probably get their 223 wydle for my next build. Very good quality and runs great with my COLT lower, BCM charging handle and a laRue trigger. Fit was mil spec. I did have to rezero my Credo about 10 clicks to the right compared to my 556 just keep that in mind. Also, with this size and twist rate the upper is best suited for subsonic 220g. That's exactly what I wanted. Short and very quiet.
Pros:
- None
Cons:
- None
Would recommend: Yes
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