UPRISER Chassis for Ruger® PC Carbine


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10.50 LBS
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Now available for the "UPRISER" Chassis, is the Straight version for the Stock Grip Adapter. - Please note this option is chosen in the dropdown menu along with *Color and *Collapsible Buttstock and Buffer Tube for AR-15 by Rim/Edge*


Upriser Chassis for Ruger PC Carbine Installation Instructions


At a Glance:

  • Trigger finger accessible magazine release
  • Compatible with virtually all AR Grips, buffer tubes and butt stocks
  • Comes with optional flared magwell
  • Includes renowned TANDEMKROSS hiveGrip for the AR-15 platform


Rise above the competition with the TANDEMKROSS “UPRISER” Chassis for the Ruger® PC Carbine®!


The lightweight reinforced polymer “UPRISER” chassis reduces the overall weight and provides a better balance and feel.


Designed with cross-compatibility in mind, the “UPRISER” Chassis will accommodate virtually all AR grips (with or without 'beavertail') and mil-spec buffer tubes/stocks!


The "UPRISER" package includes:

  • Extended magazine release 
  • Flared magwell (hardware included)
  • "hiveGrip" for AR-15 (hardware included)
  • Stock and grip adapter
  • Dowel pin


Trigger finger extended mag release:

Don’t skip a beat! The unique trigger finger actuated magazine release allows for quick and intuitive magazine release. Simply lift your finger off the trigger and press the release for fast and reliable mag changes.

Flared magwell:

The wide, flared and beveled design guides the magazine directly into your magwell, for faster and consistent mag changes.



"hiveGrip" for AR-15:

Defined, ergonomic finger grooves improve hand placement for more accurate, controlled shooting, while the slim, low-profile design ensures an ideal fit for any user. Made from patented impact- and vibration-dampening material, these "hiveGrips" are an ideal upgrade for any AR-15. Designed with a hollow grip, the "hiveGrip" for AR-15 includes a removable O-ring sealed bottom to provide water resistant storage space for tools, extra rounds, or survival items.


*Stock and Grip adapter available in two options: 

(Option #1)Angled Stock and grip adapter: The Stock and Grip Adapter is angled at a 12 degree pitch. This is a perfect choice for red dot optics as the design allows for use of a wider assortment of sights. When shouldering the rifle, the sight picture is closer to the bore axis which allows use of an RMR, scope, or red dot without a riser. This creates a comfortable and ergonomic cheek weld, which will result in quick and natural sight acquisition.

(Option #2) Straight Stock and grip adapter: The Stock and Grip Adapter match the more traditional aesthetics of the AR style Buttstock

Don't have a Buttstock/Buffer tube? Bundle the Collapsible Buttstock and Buffer Tube for AR-15 by Rim/Edge, along with your "UPRISER" Chassis to be fully #TANDEMIZED! This is a complete mil-spec stock and buffer tube kit with a 6 position adjustable stock!


Don't be left behind! Elevate your performance with the new TANDEMKROSS “UPRISER” Chassis!


This kit is available in Black or Red-


RED option will include:

  • RED - Extended Mag release
  • RED - Stock and Grip Adaptor

Supported Models- This stock will accommodate 9mm and 40 caliber Ruger® PC Carbine®. Also compatible with Ruger® and Midwest Industries Forend


*Please note* for the Ruger Chassis models, installation will require a second takedown screw. The "Twister" Takedown Knob for Ruger® 10/22® is an excellent replacement for this front takedown screw!


*Know your State and Federal laws before installing on your receiver*


Canadian customers please note: The UPRISER Chassis for the Ruger® PC Carbine™  is considered a frame and the Canadian government requires us to have on file a copy of your Possession and Acquisition License before we can export this part. You will upload a clear, legible scanned image or photo from your phone of your PAL to you EasyExport account.



Don't forget, all TANDEMKROSS products are Made in the USA and come with a LIFETIME guarantee!


IMPORTANT: This product complies with ATF RULING 2009-2

Any person who installs “drop in” replacement parts in or on existing, fully assembled firearms does not manufacture a firearm and does not need to be licensed as a manufacturer under the Gun Control Act. A “drop in” replacement part is one that can be installed in or on an existing, fully assembled firearm without drilling, cutting, or machining. A replacement part, whether factory original or otherwise, has the same design, function, substantially the same dimensions, and does not otherwise affect the manner in which the weapon expels a projectile by the action of an explosive. Any person who is licensed as a dealer, which includes a gunsmith, and who installs “drop in” replacement parts in or on existing, fully assembled firearms as described in this ruling does not need to be licensed as a manufacturer under the Gun Control Act. Any person who is engaged in the business of installing “drop in” replacement parts in or on existing, fully assembled firearms as described in this ruling must be licensed as a dealer, which includes a gunsmith, under the Gun Control Act.


This item is NOT considered an “80% Lower” and Complies with Rule 2021 R-05F

Grandfathers in existing classifications of frames or receivers (to include split frames or receivers) and allows them to be marked in accordance with the existing requirements.


The full definition can be found here: https://www.atf.gov/rules-and-regulations/definition-frame-or-receiver/summary

This product is NOT a serialized part.


WARNING: This product can expose you to chemicals including chromium, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.

71 Reviews

  • 5
    Upriser for Ruger PC Carbine

    Posted by Daniel Bird on 19th May 2022

    Excellent upgrade, easy to install. If you are looking to up grade your Ruger, I highly recommend this product.

  • 5

    Posted by Paul Sullivan on 9th May 2022

    This was so easy to put together. Looks good and shoots great.

  • 4
    Upriser chassis

    Posted by Leonard Gonzales on 7th May 2022

    I stared with the upriser then switched to the straight, it just fit me better. The only issue I've had is keeping the screw tight that holds the straight or angled adaptor in place. If I really tighten it, it binds the bolt assembly. If I back it off slightly, I have to take the grip off and snug it up after about 50 shots during Steel Challange matches. Other than that it's a great design and looks great

  • 5
    Great Product Great Company Great Service!

    Posted by Jeff H on 4th May 2022

    I purchased an array of items including the Upriser, Victory Trigger, Challenger charging handle, Shock Block and both the angled and straight grip adapters for my PC9 and of them have been great. The products are quality and really are easy to install. These have definitely increased my enjoyment of what used to be a stock firearm. However, the reason I wanted to write a review was that on my last order a smaller item I wanted was out of stock, so in the order notes I stated that if the part came in before the order ships, please add it to the order and I would pay the difference. Well, imagine my surprise when the order showed up at my door with the extra part included, for FREE! That's how you build customer loyalty and says a lot about the great folks there at Tandemkross. Thank you guys, I'll be back!

  • 5
    Upriser chasis is awesome

    Posted by Jason on 2nd May 2022

    I absolutely love my upriser chasis. Easy to install good fit and finish. The ergonomics of the angled version are amazing. I paired with the utg pro fore end and it looks like they were made for each other. Tandemkross hit another homerun with this one.

  • 5
    Pc carbine

    Posted by sheldon on 17th Apr 2022

    Awesome i just love it on my ruger

  • 5
    upriser stock kit

    Posted by Jeffrey on 6th Apr 2022

    Purchased this for a Ruger PC. It is a great product and well thought out. Assembly to the weapon was very easy. The instructions were clear and easy to understand. The new stock made the Ruger PC much more pleasant to shoot. The extended magazine release is fantastic - no fumbling or looking for the release button.

  • 5
    Worked as advertised

    Posted by Mike on 5th Mar 2022

    Worked as advertised. Quick shipping. I am very happy with this product.

  • 5
    Love this Chassis

    Posted by Robert Seal on 26th Feb 2022

    I have been looking to upgrade the stock for the PC Carbine since I got it. I looked at several and picked this one because it offered several solutions at a very affordable price. Other systems looked good, but to make all of the changes this afford, would’ve cost as much as the gun itself. I chose this and love it. Easy to install. Fit is spot on. I didn’t think I wanted the additional (right side) mag release, but find that it made operation so much better. The flared mag well is a little cheap looking, but works. I almost did not install it, but it does improve operation, especial with the fun sticks. I would recommend this and would buy it again.