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B5 Systems

Ar-15 Enhanced Sopmod Stock Collapsible Mil-Spec - Ar-15 Enhanced Sopmod Stock Collapsible Mil-Spec Multi-Cam

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

Fits M4-type

A reinforced polymer construction

Improved Cheekweld

Is designed for increased comfort

Two Waterproof

Storage compartments hold 2 AA

Streamlined Contours

Are intended to resist snagging

Sure-grip Stock

Latch supports convenient length-of-pull adjustment

$107.00
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SKU: 100016917

Overview

Designed for M4-type receiver extensions, this collapsible stock is built for shooters who want a more consistent cheekweld and straightforward length-of-pull adjustment. Its reinforced polymer construction includes two waterproof storage compartments sized for 2 AA or 3 CR-123 batteries, making it practical for carrying small essentials on the rifle. Streamlined contours are intended to reduce snagging on clothing, gear, or vegetation, while the anti-slip rubber recoil pad and Sure-Grip latch support secure shoulder placement and easy adjustment. A black stainless steel QD swivel mount and two molded sling slots add carry options without adding unnecessary bulk.

Why Hunters Choose the B5 Systems

Improved Cheekweld

Supports more consistent shoulder placement

Two Waterproof

Storage compartments hold small items

Fits M4-type

Receiver extensions for compatible collapsible

Streamlined Contours

Help reduce snagging on clothing,

Sure-grip Stock

Latch allows convenient length-of-pull adjustment

Key Features

  • Fits M4-type receiver extensions with a reinforced polymer construction.
  • Improved cheekweld is designed for increased comfort and consistency.
  • Two waterproof storage compartments hold 2 AA or 3 CR-123 batteries.
  • Streamlined contours are intended to resist snagging on clothing, gear, or vegetation.
  • Sure-Grip stock latch supports convenient length-of-pull adjustment.
  • Includes a black stainless steel QD swivel mount and two molded sling slots.

Best Used For

  • Hunters wanting a more consistent cheekweld on M4-type receiver extensions
  • Users needing onboard storage for batteries during field carry or range sessions
  • Operators who prefer snag-resistant stock contours around clothing, gear, or brush
  • Shooters using quick-detach slings and integrated sling-slot mounting options
  • Those seeking a collapsible stock with intuitive length-of-pull adjustment

Specifications

ColorMulti-Cam
Improved CheekweldYes
Length Of Pull AdjustmentYes
MaterialReinforced polymer
Qd Swivel MountBlack, stainless steel
Receiver Extension CompatibilityM4-type receiver extensions
Recoil PadAnti-slip rubber recoil pad
Sling SlotsTwo molded 1A 1/4" wide sling slots
Snag Resistant ContoursYes
Stock LatchSure-Grip stock latch
Storage Capacity2 AA batteries or 3 CR-123 batteries
Waterproof StorageYes

Pros

  • Improved cheekweld supports more consistent shoulder placement and comfort.
  • Two waterproof storage compartments hold small items or spare batteries.
  • Fits M4-type receiver extensions for compatible collapsible setups.
  • Streamlined contours help reduce snagging on clothing, gear, or vegetation.
  • Sure-Grip stock latch allows convenient length-of-pull adjustment.
  • Includes a black stainless steel QD swivel mount and molded sling slots.

Considerations & Trade-offs

  • Designed for M4-type receiver extensions, so fit is specific and not universal across all AR-style setups.
  • The integrated storage compartments are limited to small items such as 2 AA or 3 CR-123 batteries, so capacity is modest.
  • The reinforced polymer construction and anti-slip pad add utility, but the product is still a stock rather than a feature-rich accessory with broader customization.
  • Multi-Cam finish may be a practical match for some setups, but it is a specific appearance choice rather than a neutral option.

Suggested Comparisons

  • AR-15 stock
  • M4-type receiver extension accessory
  • rifle sling mounting accessory
  • battery storage accessory

Suggested Accessories

  • Sling
  • QD swivel
  • AA batteries
  • CR123 batteries

Frequently Asked Questions

What receiver extensions does this stock fit?

It fits M4-type receiver extensions.

Does the 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 in the field?

Yes. The streamlined contours are described as resisting snagging on clothing, equipment, or vegetation.

What sling attachment options are included?

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