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TANDEMKROSS Straight Upriser Chassis For Ruger PC Carbine
$199.99 $189.99 Save $10.00
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Most Helpful Positive Review UpRiser PRO
For a bigger guy the standard Ruger PCC stock length wasn't a great fit. It's been 6months since I got this kit. Comparing it to the others I've shot, none compared to how I have this set up. Even if you buy the Tactical edition of the rifle the ergonomics with the UpRiser set is more practical and comfortable to me and my friends. I've even talked my friend with the Midwest industries kit on his to change it out. TK all the way!!!
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Love this upper riser

by Sig Siggley, Verified Owner from FL, United States Written on January 16, 2026
There was one issue that drove me crazy. There is a gap between the reciever handle and the upriser which made me nuts. The fix is to back off the buffer tube some after screwing it all the way in. You might have to adjust the upper reciever screws as well to get it right. Make sure you tighten them evenly, starting with the rear screw first.
Would recommend: Yes
Was it helpful to you? Yes | No

Chassis with Straight Adapter

by Jared DeBlois, Verified Owner from TX, United States Written on February 21, 2024
Well, if you like tight tolerances and no gaps in your tools, do NOT buy this chassis. The adapter mount for the buffer tube is not machined to match the mounting surface and therefore when you tighten it, it opens a pretty ugly gap. On my chassis, if I torque the screw to 25 in lbs, I get about 3/16 gap between the chassis and the tube mount. If I torque to the suggested 30, it's more than 1/4 inch. When I reached out to the tech team at TK, they said it's normal and "1/6 of an inch is built in to not effect the trigger module" - this doesn't make sense as not only does it not mount close to there, but it uses the factory mount hole.. otherwise I love the built-in ambi mag release and the Honeycomb Hex grip is awesome
Pros:
  • Ambidextrous mag release
  • Hex grip
Cons:
  • Terrible customer service
  • Terrible fitment
Best Used for:
  • Ruger PC
Would recommend: Yes
0 of 1 found the following review helpful.
Was it helpful to you? Yes | No

Nice addition for older PC carbine

by MartyG, Verified Owner from TX, United States Written on February 17, 2024
It is an excellent made product Tandamkross puts a lot of research into their products. The stock adapter kept coming loose even with thread locker so give a better hold i filled the open gap where the adapter fits with epoxy and resolved the loosing issue
Pros:
  • Looks and functions great
Cons:
  • None
Best Used for:
  • Target & Competition Shooting
Would recommend: Yes
1 of 1 found the following review helpful.
Was it helpful to you? Yes | No

Nice update for my Ruger PC Carbine

by Alex2302, Verified Owner from CT, United States Written on June 12, 2023
Normally I would have given 5 stars if I had received what I had ordered. Unfortunately I received the black version instead of red. This was not the fault of Optics Planet rather than the OEM who labeled the packaging with red but put in black (OK, OpticsPlanet could have checked the content before sending out though). I was of two minds about keeping the black...(in the end I decided to keep it). Everything fits well and it was really easy to install everything properly. Overall it is a really nice upgrade for the PCC.
Just be aware: you need to buy additionally a standard AR-15 buffer tube, a castle nut and a buttstock of your choice to complete the setup.
Pros:
  • Quality
  • Look
  • Ease of insallation
Cons:
  • wrong labeling of package content
Would recommend: Yes
1 of 1 found the following review helpful.
Was it helpful to you? Yes | No

Tandemkross

by Tom, from WI, United States Written on March 31, 2022
Good addition to my pc9 and preforms well on the range. Comfortable grip and didn’t add much weight. Fairly easy to install and looks very nice. I got the straight and lines up fine with my optics. Parts are well made and everything was sent in a timely manner.
Pros:
  • well made & engineered
Cons:
  • None
Would recommend: Yes
Was it helpful to you? Yes | No
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Last updated 2025-11-12 UTC.