Pete’s Pillars Rear Replacement Buttstock Weight for MDT Oryx Chassis (with QD Sling Cups)
The Pete’s Pillars Rear Replacement Buttstock Weight is a purpose-built upgrade for the MDT Oryx chassis, designed for shooters who want better balance, added functionality, and more durable rear-end support without giving up compatibility or simplicity.
Manufactured by Pete’s Pillars in the USA, this aluminum replacement part directly replaces the factory polymer rear component on the MDT Oryx chassis. It maintains full compatibility with OEM MDT Oryx accessories while adding practical features that matter in real-world use.
Real-World Use: Field & PRS Applications
For field shooters and hunters, the addition of ambidextrous QD sling cups allows proper sling placement without blocking the bottom M-LOK slot—making it easy to carry the rifle while still running a rear bag rider or support accessory.
For PRS and positional shooting, the added rear mass helps improve rifle balance, especially on builds with heavier barrels, suppressors, large optics, or front-mounted accessories. That extra weight at the rear can make the rifle settle more consistently on barricades and bags, reducing the “nose-heavy” feel common with lightweight rear components.
Factory vs. Pete’s Pillars Comparison
The factory MDT Oryx part is a plastic part weighing approximately 1.9 oz, intended to minimize overall chassis weight. It offers a simple mounting solution but does not provide integrated QD sling attachment points.
The Pete’s Pillars aluminum replacement increases rear weight to approximately 7.3 oz, improving balance and stability while adding dual left- and right-side QD sling cups. The bottom M-LOK slot remains fully usable, allowing simultaneous use of a bag rider or other M-LOK accessory. The reinforced aluminum construction also prevents issues like M-LOK hardware pulling through under load.
Key Features
- Replacement rear buttstock component for MDT Oryx chassis
- Machined aluminum construction
- Weight: approximately 7.3 oz (factory polymer part ~1.9 oz)
- Integrated QD sling cups on both left and right sides
- Preserves bottom M-LOK slot for bag riders or accessories
- Improves rear balance for field and PRS-style builds
- Compatible with all OEM MDT Oryx accessories
- Made in the USA by Pete’s Pillars
QD sling swivel not included.
Installation & Compatibility Notes
Designed specifically for the MDT Oryx chassis. Installation is straightforward for anyone familiar with chassis components. As with all Pete’s Pillars–manufactured products, installation should be performed by a competent gunsmith or an experienced DIY installer. Always ensure firearms are unloaded before installation or handling.
Why Choose Pete’s Pillars
Pete’s Pillars designs and manufactures components we actually use—focused on clean fitment, practical features, and real shooting conditions. As an authorized MDT dealer, we build accessories that integrate seamlessly with MDT systems while giving shooters more flexibility in how they set up and balance their rifles.
If you’re trying to decide whether added rear weight or sling placement makes sense for your build, our team is always happy to help you think it through.
| Brand | Pete's Pillars |
| Material | Aluminum |
To install this Web App in your iPhone/iPad press
and then Add to Home Screen.
