B5 Systems Collapsible Precision Stock Long Milspec AR-15
B5 Systems
$218.50
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B5 Systems
B5 Systems Collapsible Precision Stock Long Milspec AR-15
The B5 Systems Collapsible Precision Stock (CPS) Long brings match-grade ergonomics to your Milspec AR-15 carbine, combining a fully adjustable cheekpiece and buttpad with the battle-proven profile of B5's legendary SOPMOD and Bravo stocks — purpose-built for precision shooters and side-charging rifle setups alike.
- Adjustable cheekweld and buttpad fine-tuned via precision dials for repeatable fit
- Fits standard Milspec carbine receiver extensions — no proprietary tube needed
- 12 internal tensioners eliminate wobble and rattle for a solid, consistent lockup
- Underside M-LOK accessory mount adds modular rail real estate without bulk
- Ambidextrous fixed and steel anti-rotational QD sling mounts for flexible carry
- Optimized for side-charging uppers and LAW Tactical folding stock adapters
Who This Is For
The CPS Long is ideal for precision rifle competitors, dedicated range shooters, and tactical carbine owners who demand a consistent, dialed-in cheek weld and length of pull without sacrificing compatibility with their Milspec buffer tube. It's especially well-suited for those running side-charging upper receivers or a LAW Tactical side-folding adapter, where stock geometry and clearance are critical to reliable operation.
Specifications
| Brand | B5 Systems |
|---|---|
| Model | Collapsible Precision Stock (CPS) Long |
| Tube Compatibility | Milspec Carbine Receiver Extension |
| Cheekpiece | Adjustable via precision dial |
| Buttpad | Adjustable via precision dial |
| Internal Tensioners | 12 |
| Accessory Mount | M-LOK (underside) |
| Sling Mounts | Fixed & Steel Anti-Rotational QD (ambidextrous) |
| Length of Pull Adjustment | Pull-down with lockout |
| Hardware | Color-matched machined hardware |
| Optimized For | Side-charging uppers, LAW folding adapter |
| Country of Origin | USA |
Frequently Asked Questions
Will the B5 Systems CPS Long fit my standard AR-15 buffer tube?
Yes. The CPS Long is designed specifically for Milspec carbine receiver extensions — the same diameter buffer tube found on the vast majority of AR-15 and M4-pattern rifles. It does not require a proprietary or commercial-spec tube, making it a straightforward drop-in upgrade for most carbines.
What makes the "Long" version different from the standard CPS?
The CPS Long features an extended geometry optimized for shooters running side-charging upper receivers or a LAW Tactical side-folding stock adapter. The longer profile provides better clearance around charging handle placement and delivers a length of pull better suited to precision shooting positions, while retaining all the same adjustability features as the standard CPS.
How do the cheekpiece and buttpad adjustments work?
Both the cheekpiece height and buttpad position are dialed in using precision adjustment dials built into the stock body. This allows for repeatable, tool-free micro-adjustments so you can return to your exact preferred settings after field-stripping or sharing the rifle. The 12 internal tensioners work in conjunction to keep the stock firmly locked on the buffer tube with zero wobble throughout the adjustment range.
