Stock and Grip Adapter for TANDEMKROSS UPRISER Chassis


(7 reviews) Write a Review
0.30 LBS
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At a glance:
  • Compatible with Mil-Spec. Buffer Tube
  • Available in Red or Black Anodized Aluminum 
  • Two Styles! Angles and Straight!
The TANDEMKROSS Stock and grip adaptor (in the "UPRISER" Chassis) is now available as a solo product in two styles! - Angled and Straight!
The original - "Angled" 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.
The "Straight" Version is designed to match the traditional AR-style aesthetics. This is a great option for builds using optics with risers.
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 forget, all TANDEMKROSS products are Made in the USA and come with a LIFETIME guarantee!

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

7 Reviews

  • 5
    Angled stock and grip adapter

    Posted by Adam Brooks on 23rd Dec 2021

    I originally bought the straight upriser chassis and needed more room to see down my sights. I didn't originally get the angled version because i thought it looked funky but now I've had it installed for a while and it's perfect i love it. The upriser chassis is the only way to go with pc carbine, easy install and makes it so much better. The mag release alone is enough to pull the trigger. Buy it you'll love it. I would recommend the angled version unless your gonna run a scope or something high up.

  • 5
    Stock and grip adapter

    Posted by Tomi T on 9th Dec 2021

    I finally used my upgraded PC9 with the Tandemkross angled adapter in my first knockdown Steel competition and I love it!!!! Since I use iron sights it was a breeze hitting moving targets and the like. Having the angled adapter and the stock grip makes it easier for me to bring the rifle right up to eye level and it s comfortable enough for me to place my cheek on the rifle while shooting. Looking forward to my next competition this coming Sunday.

  • 5
    Upriser Grip Adapter

    Posted by Bruce Tokumoto on 27th Sep 2021

    Works great. All my friends were impressed. Makes looking through my red dot easier.

  • 5
    It works

    Posted by Roger on 13th Jun 2021

    Not much to say about a charging handle. Either it works, or it doesn't. It works better than the stud type OEM handle.

  • 5
    angled upriser

    Posted by Al Stanton on 6th May 2021

    You definitely want the angle to get the right head placement with red dot or open sights.

  • 5
    Angles Work!

    Posted by David on 28th Mar 2021

    I originally bought an Upriser Chasis with the straight buttstock adaptor. Wrong choice! I couldn't get low enough to see through my scope. Tandemkross' excellent customer service team swapped it out for me at no charge. After returning the straight adaptor they even shipped my angled replacement for free. I find getting the proper cheek weld at the perfect eye relief spot is super easy with this setup.

  • 5

    Posted by Gary on 16th Oct 2020

    Nice upgrade