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Questions & Answers
Will this fit into a KRG Bravo 10/22 Chassis?

I recently purchased the TK Manticore X Lower as the centerpiece of my first custom 10/22 rifle build. The short answer to your question is “no”. The Manticore X is designed as a stand alone lower similar to an AR15 lower. As such, the upper receiver/barrel, pistol grip, and choice of stock attach directly to the Manticore X Lower with a chassis of any kind. The Manticore X lower was designed to do away with the 10/22 chassis entirely.
It sounds like the Manticore Trigger Assembly paired with a 10/22 upper/barrel of your choice would be the answer for the KRG Bravo chassis application.
I would reach out to TANDEMKROSS customer service if you haven’t already. They design their parts to be compatible for Ruger 10/22 applications and cannot guarantee perfect parts match up. However aftermarket parts makers strive for interoperability to address a wide number of use cases. That’s what makes the 10/22 ecosystem so appealing, the customization possibilities are vast.
TK Customer Service is top notch and I’m certain they would be more than happy to assist you in your 10/22 build. I would suggest reaching out to KRG customer service as well to understand parts compatibility with their Bravo chassis.
Hope this helps and good luck with your build.

by Raymond Yao, Verified Owner, February 18, 2026
Customer Reviews
Most Recent Reviews
great receiver by Mathew Hines, Verified Owner, April 29, 2026
Bought this for a custom 10/22 lightweight build and couldnt be happier with this tandemkross does an amazing job on this.
Most Recent Reviews
Great product by Neal, February 20, 2026
Interesting concept, fantastic trigger, and very lightweight
Most Recent Reviews
Watch your overall length to stay legal by Brian, Verified Owner, May 29, 2025
I’ve had this idea floating around for years, great to see someone execute it. The lower has an excellent trigger, finish is nice, tolerances worked well with a couple of receivers I tried. It did not fit my 22magnum as that receiver is longer. Overa...
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Read All 3 Reviews

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Product Info for TANDEMKROSS Ruger 10/22 Manticore X Lower

Meet the Manticore X Lower for Ruger 10/22, a groundbreaking upgrade that marks the next phase in the evolution of the Manticore series and 10/22 style firearms. This modernized system is meticulously designed with modularity as its core objective, offering a level of customization that sets it apart from conventional 10/22 builds.image

For those seeking the full package, be sure to also get the PRO Bundle for Manticore X! This discounted combo includes our M-LOK Forend, AR hiveGrip, and Folding Picatinny Buttstock to provide you with everything you need for the ultimate upgrade.

Unlike traditional 10/22 chassis or stocks, the Manticore X boasts a lightweight, integrated trigger assembly and chassis design. This seamlessly mounts to Ruger 10/22 receivers, barrels, and a myriad of aftermarket accessories to offer the ultimate advancement in customization and modularity. Its compatibility extends beyond the ordinary, allowing shooters to explore diverse configurations tailored to their preferences.

The heart of the Manticore X is a pre-assembled housing ready to accept AR style grips with or without tangs. The lower doesnt just stop at grip compatibility as Manticore X also supports picatinny mounted buttstocks, braces, sling swivels, and more to accommodate a wide array of accessories. Additionally, the Manticore X Lower also features an integrated QD sling mount reversible for left or right side use.

Manticore X uses TANDEMKROSSs self-capturing Upgraded Receiver KrossPins as a universal takedown mechanism. This method offers improved accuracy and reliability over a detachable barrel system. Fixed barrel and takedown receiver owners can now break down and reassemble their firearm without any shift in point of impact (POI) as the barrel, receiver, and optic remain fixed. The Manticore X works with both takedown and non-takedown receivers.

Embrace the future of rimfire with the Manticore X Lower from TANDEMKROSS!

WARNING: California`s Proposition 65

Specifications for TANDEMKROSS Ruger 10/22 Manticore X Lower:

Manufacturer: TANDEMKROSS
Finish: Matte
Fabric/Material: Aerospace Grade Aluminum
Gun Make: Ruger
Gun Model: Ruger 10/22 Competition, Ruger 22 Charger, Ruger 10/22 Takedown, Ruger 10/22

Features of TANDEMKROSS Ruger 10/22 Manticore X Lower

  • Merged chassis and trigger assembly for easier takedown and reduced weight
  • Improved user-customization
  • Optic, barrel, and receiver detach as a unit to maintain consistent zero

Package Contents:

  • TANDEMKROSS Ruger 10/22 Manticore X Lower
    • Ultimate Trigger Kit: A lightened trigger pull with a textured, flat-faced Victory Trigger Shoe
    • Trigger adjustability: adjustable for over-travel and pull-weight from approximately 2.25lbs to over 5lbs
    • Cornerstone Rotary Safety: Ambidextrous, short throw rotary safety selector
    • Bolt Keeper Extended Bolt Lock: auto bolt release and enlarged actuation knob for simplified use
    • Fireswitch Extended Magazine Release: textured face and bi-directional actuation; push or pull to drop magazines
    • Enlarged trigger guard: supports large or gloved hands; features index points for memorable ready position
    • Direct grip mount: accommodates AR compatible pistol grips with or without a beavertail
    • Direct stock/brace/sling mount: rear picatinny mount for stocks, slings, or braces; can be configured for inline or 12 downward pitch to customize stock angle
    • Integral QD rear sling mount: swappable to left or right side
    • Upgraded pins: includes self-capturing rubberized Shock Block Bolt Buffer to replace steel bolt stop pin and ball-detent Upgraded Receiver KrossPins
    • Pin Storage: dedicated retaining holes in lower to store KrossPins and Shock Block Bolt Buffer when disassembled
    • Free floating barrel: The barrel is free-floating from the chassis, allowing for superior accuracy

TANDEMKROSS Ruger 10/22 Manticore X Lower Orderable Models

List of Orderable Models

  • TANDEMKROSS Ruger 10/22 Manticore X Lower, Black, TK18N0511BLK1 , MPN: TK18N0511BLK1 , UPC: 41609630021 , Code: 3GZ-TGR-TDKRS18-TK18N0511BLK1
  • TANDEMKROSS Ruger 10/22 Manticore X Lower, Red, TK18N0511RED1 , MPN: TK18N0511RED1 , UPC: 657768394973 , Code: 3GZ-TGR-TDKRS18-TK18N0511RED1
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