Description
The B5 Systems Collapsible Precision Stock (CPS) Long bridges the gap between a rock-solid fixed stock and the flexibility of a collapsible carbine stock. It builds on the proven cheek profile of the B5 SOPMOD and Bravo stocks, then layers in real precision adjustment so you can lock in the same cheek weld shot after shot. Made from durable polymer with color-matched steel hardware, it slides right onto any mil-spec carbine receiver extension and stays put thanks to twelve internal tensioners that kill the rattle you get with a lot of adjustable stocks.
Dialing In the CPS Long for Your Setup
What sets this stock apart is the elevation-adjustable cheek riser and extendable rubber buttpad, both tuned with precision dials. If you run magnified glass, getting your eye at the right height behind the scope is half the battle, and being able to fine-tune the cheek weld and length of pull means you stop fighting your rifle and start driving it. The gross length of pull adjustment works off a pull-down lever with a lockout, so you can go from a compact carry position to a full extension without tools.
Why the Long Model and Not the Medium
The Long designation matters here. This cheekpiece sits forward, which makes it the right pick for rifles running a side charging handle or a LAW side folding adapter. If your build has a standard M4-style charging handle, the cheek plate can crowd it, so the Medium or Short versions are the better call for those. Match the model to your charging setup and you'll be glad you did.
Sling and Accessory Options on the CPS Long
Mounting options are covered from every angle. You get fixed sling loops plus ambidextrous steel anti-rotational QD sockets, so lefties and righties can set up a sling however they like. Underneath, an M-LOK slot lets you add a monopod or other accessory for those long, supported shots. It's proudly made in the USA and finished to the same mil-spec standard B5 is known for.
Key Specifications
- Manufacturer: B5 Systems
- Manufacturer Part Number: CPS-1414
- Model: Collapsible Precision Stock (Long)
- UPC: 814927022805
- Color: Coyote
- Material: Polymer with color-matched steel hardware
- Platform: AR-15 / AR-style
- Fitment: Mil-Spec carbine receiver extensions (M4/A5/M110K)
- Internal Tensioners: 12
- Cheek Riser: Elevation adjustable with precision dial
- Buttpad: Extendable, cushioned non-slip rubber
- Length of Pull: Gross adjustment via pull-down lever with lockout
- Sling Mounts: Fixed loops plus ambidextrous anti-rotational steel QD
- Accessory Mount: Underside M-LOK slot
- Optimized For: Side charging and LAW side folding adapter rifles
- Origin: Made in the USA
What’s Included
- B5 Systems Collapsible Precision Stock (CPS) Long in Coyote
Frequently Asked Questions
Will the CPS Long fit my standard mil-spec AR-15?
Yes, it slides onto any mil-spec carbine receiver extension and locks up tight with twelve internal tensioners. Just keep in mind the Long model's cheekpiece sits forward and is built for side chargers and folding-adapter rifles. If you have a standard M4-style charging handle, the Medium or Short version clears it better.
What can I adjust on the B5 Precision Stock Long?
You get an elevation-adjustable cheek riser and an extendable buttpad, both set with precision dials for a repeatable fit. There's also gross length of pull adjustment through a pull-down lever with a lockout. Together those let you dial in a consistent cheek weld and proper eye height behind your optic.
Does the CPS Long have sling and accessory mounting options?
It does. You get fixed sling loops along with ambidextrous steel anti-rotational QD sockets, so you can run a sling from either side. There's also an M-LOK slot on the underside for a monopod or other accessory.
Is this stock going to rattle on my buffer tube?
That's one of the main reasons people go with the B5 CPS. The twelve internal tensioners clamp down on the buffer tube to eliminate the wobble and rattle common with a lot of adjustable stocks. It ends up feeling closer to a fixed stock in terms of solidity.







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