B5 Systems

B5 Systems Collapsible Precision Stock Medium for AR-15

Name: B5 Systems Collapsible Precision Stock Medium for AR-15
Brand: B5 Systems
SKU: CPS-1304

£269.99

Tax included where applicable.

In stock7–10 day delivery

Colour: Black

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Delivery Information

Orders are dispatched from the United Kingdom with tracked delivery. You will receive tracking details by email once your order ships.

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SKU: CPS-1304UPC: 814927022201

Product Overview

The full-envelope precision stock — B5's CPS Medium pairs adjustable fit with the reach taller shooters need.

The B5 Systems Collapsible Precision Stock in Medium configuration delivers the CPS system — a precision-adjustable cheek riser and adjustable buttpad on a collapsible Mil-Spec chassis — with a longer extension envelope suited to taller shooters and longer length-of-pull preferences. Eye alignment behind magnified glass becomes a setting you dial in, not a compromise you tolerate.

As a military-contract manufacturer, B5 over-builds its adjustment hardware: the riser and pad lock positively and hold zeroed positions through recoil, transport and hard positional work. The Medium CPS is the pick for full-size precision gas guns that still need to collapse for the case.

Why shooters choose the CPS Medium

Precision-adjustable cheek riser — repeatable eye-to-optic geometry
Adjustable buttpad — dial the shoulder interface precisely
Medium envelope — the right reach for taller shooters
Contract-grade hardware — settings that survive hard use
Four colours — Black, Flat Dark Earth, Coyote Brown, Olive Drab Green

Fit & installation

Fits Mil-Spec carbine receiver extensions. Set cheek height and pad position at the bench behind your optic; the locks hold your numbers.

Specifications

Model: Collapsible Precision Stock (CPS), Medium
Platform: AR15/M4
Fit: Mil-Spec carbine receiver extension
Adjustment: Precision cheek riser & buttpad
Colours: Black, Flat Dark Earth, Coyote Brown, Olive Drab Green

Fit, dialled. Order the CPS Medium today — in stock at Xtreme Tactical Gun Parts with free UK delivery.

Explore more: Rifle & Shotgun Stocks, Precision Rifle Stocks, AR-15 Parts or browse all B5 Systems.

Compatibility & Fitment

Fits AR15/M4 rifles with a Mil-Spec-diameter carbine receiver extension (buffer tube). Check your tube specification before ordering.

Please confirm platform, interface and fitment requirements before ordering.

Technical Specifications

SKU / MPN	CPS-1304
UPC / Barcode	814927022201
Brand	B5 Systems

Shop Related Categories

Shop AR-15 Parts & Accessories View category

Shop B5 Systems View category

Shop B5 Systems Stocks View category

Shop Precision Rifle Stocks View category

Related Buying Guides

Not sure which option is right for your build? These guides break it down.

Buying Guide How to Choose an AR-15 Stock: Fit, Length of Pull & Platform

Buying Guide Best AR-15 Upgrades Under £100 (That Actually Make a Difference)

Buying Guide B5 Systems: The SOPMOD Story — Bravo, CPS & P-Grip Explained

View all buying guides →

Product Questions

Which rifles will the medium CPS go on?

Any AR15/M4 with a Mil-Spec-diameter carbine receiver extension. It replaces a standard collapsible stock on the existing tube, so no change of buffer or spring is normally involved. Commercial-diameter tubes are not compatible, so confirm your tube specification first.

Should I pick medium over short?

The medium body gives a slightly longer reach through its range of positions, which tends to suit shooters using a settled, squared-up position behind a scope or those with longer arms. The short-length CPS is the one to choose if compact overall length or shooting in kit matters more. If you are between the two, measure your current comfortable length of pull and work from there.

What makes it a precision stock if it still collapses?

It combines a collapsible carbine body with an adjustable cheek riser and buttpad, so you get repeatable head and shoulder placement without giving up the ability to shorten the rifle for storage or transport. That is the main reason people choose it over a fixed precision stock. It is a B5 design through and through, and the B5 Systems brand guide covers how the range fits together.

What colours can I get and what else should I budget for?

The medium CPS is available in Black, Flat Dark Earth, Coyote Brown and Olive Drab Green. Beyond the stock itself you only need your existing buffer tube assembly, though a sling mount is worth thinking about if your current one lives on the old stock. Check what sling attachment you are using before you swap.

What are the delivery and returns arrangements?

Orders leave the United Kingdom with free tracked UK delivery, and you'll get tracking by email when it ships. If a part turns out to be the wrong fit, see our returns policy or contact us and we'll help sort it.