PTR PDW-050550 CS1 COLLAPSIBLE 4-POS STK 9C 9CT 9R
The PTR PDW-050550 CS1 collapsible stock brings practical adjustability to your platform rifle or pistol-caliber carbine. PTR Industries designed this four-position collapsible stock for shooters who need to dial in length of pull quickly—whether you're switching between shooting positions, accommodating different gear layers, or fitting the gun to multiple users. The simple detent system locks each position securely, so your sight picture stays consistent once you've set it.
Built for reliability in the field, this stock works with common AR-pattern platforms and integrates straightforwardly into your existing setup. The design prioritizes function over flash—no gimmicks, just a solid, adjustable cheek rest that lets you find your natural shooting position without fumbling. Whether you're running drills at the range, hunting, or training, a properly fitted stock makes a real difference in your ability to shoot accurately and comfortably.
PTR's reputation for no-nonsense, combat-proven components carries through in this stock. It's the kind of piece that works hard without drawing attention to itself, which is exactly what most shooters want.
Key Features
- Four-position collapsible design for quick length-of-pull adjustment
- Detent-locked positions for secure, stable setup
- Straightforward AR-pattern compatibility
- Rugged construction for field and range use
Specifications
| Manufacturer | PTR Industries |
| Model | PDW-050550 CS1 |
| Type | Collapsible Stock |
| Positions | 4 |
Frequently Asked Questions
What platforms does the PTR PDW-050550 CS1 stock fit?
This stock is designed for AR-pattern rifles and pistol-caliber carbines that accept standard collapsible stocks. Verify compatibility with your specific platform before purchase.
How many adjustment positions does it have?
The stock features four distinct positions, each secured by a detent mechanism to keep your chosen length of pull locked in place during shooting.
Is this stock easy to install?
Yes—PTR designed it for straightforward installation on compatible AR-pattern platforms. If you're familiar with standard AR ergonomics, mounting is routine.

