Stock PartsB5 SystemsSold by Brownells

B5 Systems

Ar-15 Accessory Cheek Piece - Ar-15 Accessory Cheek Piece Black

Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.

Fits All

Variants of the B5 Collapsible

Mounts Adjusts

Using the undercuts found on

Adds 3/8"

Of height for improved cheek

Horizontal Adjustment

To help dial in cheek

Made Mil-spec

Materials and finish

$19.95
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SKU: 430104491

Overview

This cheekpiece is designed to work with all variants of the B5 Collapsible Precision Stock, giving shooters a simple way to fine-tune stock fit. It adds 3/8" of height along with horizontal adjustment to help support more consistent cheek placement when setting up an AR-15 for precision use. A soft overmold is included for added comfort, and the piece is built with Mil-Spec materials and finish. At 2.00 oz., it adds a modest amount of weight while keeping the setup focused on adjustability rather than complexity.

Why Hunters Choose the B5 Systems

Fits All

Variants of the B5 Collapsible

Mounts Adjusts

Using the CPS undercuts for

Adds 3/8

Inch of height and horizontal

Soft Overmold

Is included for added comfort

Made Mil-spec

Materials and finish

Key Features

  • Fits all variants of the B5 Collapsible Precision Stock (CPS).
  • Mounts and adjusts using the undercuts found on the CPS.
  • Adds 3/8" of height for improved cheek placement.
  • Provides horizontal adjustment to help dial in cheek position.
  • Made of Mil-Spec materials and finish.
  • Soft overmold adds comfort during use.

Best Used For

  • Users running a B5 Collapsible Precision Stock who want adjustable cheek placement
  • Shooters needing added cheek height and horizontal adjustment on a compatible stock
  • Hunters building a precision-oriented AR setup with a more consistent cheek weld
  • Anyone seeking a soft overmold cheekpiece for added comfort on the stock
  • Owners of CPS-equipped rifles looking for a simple, compatible accessory

Specifications

Added Height3/8 in.
Available ColorsAll standard colors
Blade FinishMil-Spec finish
CompatibilityFits all variants of the B5 Collapsible Precision Stock (CPS)
Horizontal AdjustmentYes
Length4.50 in.
MaterialMil-Spec materials
Mounting MethodMounts and adjusts via the undercuts found on the CPS
OvermoldSoft overmold
Weight2.00 oz.
Width2.43 in.

Pros

  • Fits all variants of the B5 Collapsible Precision Stock (CPS).
  • Mounts and adjusts using the CPS undercuts for a secure fit.
  • Adds 3/8 inch of height and horizontal adjustment for cheek placement.
  • Soft overmold is included for added comfort.
  • Made of Mil-Spec materials and finish.
  • Available in all standard colors for easier matching.

Considerations & Trade-offs

  • Fits all variants of the B5 Collapsible Precision Stock (CPS), so it is not a universal cheekpiece for other stock systems.
  • Adds 3/8" of height and horizontal adjustment, which is useful for cheek placement but may change the stock’s feel and profile.
  • Designed to mount and adjust via the undercuts found on the CPS, so installation depends on having the compatible stock interface.
  • Available in standard colors, but the provided product data only identifies the black version here.

Suggested Comparisons

  • AR-15 stock accessories
  • Cheek risers
  • Precision rifle stock upgrades
  • Rifle fit and adjustment accessories

Suggested Accessories

  • Rifle stock accessory
  • Cheek riser
  • Replacement stock hardware
  • Firearm cleaning kit

Frequently Asked Questions

What stock does the B5 Systems Accessory Cheekpiece fit?

It fits all variants of the B5 Collapsible Precision Stock (CPS).

How does the cheekpiece attach to the stock?

It mounts and adjusts via the undercuts found on the CPS.

What does the ACP change about cheek placement?

The ACP adds 3/8" of added height and horizontal adjustment to help with cheek placement.

What materials and finish are listed for this cheekpiece?

The product is described as made of Mil-Spec materials and finish, with a soft overmold for increased comfort.

What are the listed size and weight specifications?

The listed specs are 2.00 oz. weight, 4.50 in. length, and 2.43 in. width.