Stock PartsB5 SystemsSold by Brownells

B5 Systems

Ar-15 Enhanced Sopmod Stock Collapsible Mil-Spec - Ar-15 Sopmod Stock Collapsible Mil-Spec Od Green

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

Reinforced Polymer

Stock fits M4-type receiver extensions

Improved Cheekweld

Supports more comfortable, consistent shouldering

Two Waterproof

Storage compartments hold 2 AA

Streamlined Contours

Help reduce snagging on gear

Sure-grip Stock

Latch allows convenient length-of-pull adjustment

$95.00
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SKU: 100029286

Overview

Built for M4-type receiver extensions, this collapsible stock is designed to support a more consistent cheekweld and a comfortable shoulder interface during use. It also adds two waterproof storage compartments sized to hold 2 AA or 3 CR-123 batteries, giving hunters and shooters a place to keep small essentials close at hand. The streamlined profile is intended to reduce snagging on clothing, gear, or vegetation, while the Sure-Grip latch allows straightforward length-of-pull adjustment. A black stainless steel QD swivel mount, two molded sling slots, and an anti-slip rubber recoil pad round out a practical setup for field use.

Why Hunters Choose the B5 Systems

Improved Cheekweld

Supports more consistent shoulder placement

Two Waterproof

Storage compartments hold 2 AA

Streamlined Contours

Help reduce snagging on clothing,

Sure-grip Stock

Latch allows convenient length-of-pull adjustment

Anti-slip Rubber

Recoil pad helps secure the

Key Features

  • Reinforced polymer stock fits M4-type receiver extensions.
  • Improved cheekweld supports more comfortable, consistent shouldering.
  • Two waterproof storage compartments hold 2 AA or 3 CR-123 batteries.
  • Streamlined contours help reduce snagging on gear or vegetation.
  • Sure-Grip stock latch allows convenient length-of-pull adjustment.
  • Anti-slip rubber recoil pad helps secure the weapon to the shoulder.
  • Includes a black stainless steel QD swivel mount and two molded sling slots.

Best Used For

  • Hunters wanting a more consistent cheekweld on an M4-type receiver extension
  • Users needing onboard storage for AA or CR-123 batteries in the stock
  • Field setups where streamlined contours help reduce snagging on gear or vegetation
  • Shooters who prefer quick, intuitive length-of-pull adjustment with a Sure-Grip latch
  • Operators using sling attachments and QD swivel mounts on compatible rifles

Specifications

Battery Capacity2 AA or 3 CR-123 batteries
CheekweldImproved cheekweld
ColorOD Green
Fits Receiver ExtensionsM4-type receiver extensions
Length Of Pull AdjustmentSure-Grip stock latch
MaterialReinforced polymer
Qd Swivel MountBlack, stainless steel
Recoil PadAnti-slip rubber recoil pad
Retailer Price$95.00
Sling SlotsTwo molded 1A 1/4" wide sling slots
Snag ResistanceStreamlined contours resist snagging
Storage Compartments2 waterproof storage compartments

Pros

  • Improved cheekweld supports more consistent shoulder placement and comfort.
  • Two waterproof storage compartments hold 2 AA or 3 CR-123 batteries.
  • Streamlined contours help reduce snagging on clothing, equipment, or vegetation.
  • Sure-Grip stock latch allows convenient length-of-pull adjustment.
  • Anti-slip rubber recoil pad helps secure the weapon to the shoulder.
  • Includes a black stainless steel QD swivel mount and molded sling slots.

Considerations & Trade-offs

  • Designed for M4-type receiver extensions, so it is not a universal stock for every AR-style setup.
  • The integrated storage compartments are sized for 2 AA or 3 CR-123 batteries, which limits what can be carried inside the stock.
  • The streamlined profile is intended to reduce snagging, but the added contours and storage features may not suit users who prefer a simpler stock design.
  • Includes a black QD swivel mount and molded sling slots, but sling attachment options are still limited to the built-in mounting points provided.

Suggested Comparisons

  • AR-15 stock accessories
  • Mil-spec collapsible stocks
  • Sling mounts and swivels
  • Battery storage accessories

Suggested Accessories

  • Sling swivel
  • Rifle sling
  • Battery storage organizer
  • QD sling attachment

Frequently Asked Questions

What type of receiver extension does this stock fit?

It fits M4-type receiver extensions.

Does this stock provide storage?

Yes. It has two waterproof storage compartments running the length of the stock, sized to hold 2 AA or 3 CR-123 batteries.

What features help with cheek placement and shoulder contact?

The description says it offers an improved cheekweld for increased comfort and consistency, and it includes an anti-slip rubber recoil pad to help secure the weapon to the shoulder.

Is the stock designed to reduce snagging?

Yes. The long description says its streamlined contours are intended to resist snagging on clothing, equipment, or vegetation.

What sling attachment options are included?

It features a black stainless steel QD swivel mount and two molded 1A 1/4" wide sling slots.