Reviews & Ratings for Primary Weapons Systems MK116 PRO 16 inch Upper Receiver — 2 reviews — Page 1

I paired this upper with a PWS complete lower I bought used locally. Took it to the range and shot 150 rds - had one stovepipe at about the 90-95 round count. No other malfunctions or problems. The reason for 4 stars is it wasn't as smooth as I had hoped. Nothing specifically wrong, just not nice or smooth enough to justify the full 5 stars. Components and construction seem high quality, but finish a bit on the weak side - more wear than should be after only 150 rds. Got a really good deal, since this particular model (Mk116 Pro) has been discontinued by PWS.

It works flawlessly right out of the box. Attached it to my lower I built on my own. Good length and balance. I added some attachments. I added a M-LOK QD Swivel mounts so i can use 2 Point Rifle Sling, Magpul backup sights, and the Burris TAC30 which is a close quarter tactical optics kit. It looks great with the upper.

Fired approximately 200 rounds at the range last weekend. Very accurate. I was able to get tight groups at 50 and 100 yards after zeroing it in. I like the matte finish. Recoil is good and very manageable. The Radian Raptor LT Ambi Charging Handle is very smooth. I have not gotten a chance to use the adjustable gas regulator. I also bought a PWS Compensator since flash hider is not allowed in California...

This was my first rifle build and i am very happy with how the upper performs. I highly recommend it for those who want to build an affordable and accurate rifle.