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UTG AR15 Ops Ready S4 Mil-Spec Stock Kit, Includes 6 Position Extension Tube, Recoil Buffer, Black

SKU: UTRBUS4BM MFR: RBUS4BM
$59.97
$69.97
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Key Features

  • Enhance your AR15 with this UTG Ops Ready S4 Mil-Spec Stock Kit for superior performance.
  • Enjoy a comfortable shooting experience with the removable extended cheek rest insert.
  • Rely on the durable polymer construction for long-lasting use in any shooting condition.
  • Achieve optimal accuracy with a stable 6-position extension tube and recoil buffer.
  • Quickly attach slings using the reversible QD sling swivel housing for versatile carry.
  • Get exceptional value with this complete AR15 stock kit, including all essential parts.
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Special Order?Estimated to Ship: 10/19/2025
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UTG S4 Mil-Spec Stock Kit Specifications

  • Material

    Polymer

  • Dimensions (HxL)

    4.75 x 4.28" (120.65 x 108.71mm)

  • Weight

    17.1 oz (484.78g)

  • UPC Code

    4717385552678

About UTG S4 Mil-Spec Stock Kit

Are you in search of a high-quality, durable, and versatile AR15 Ops Ready S4 Mil-Spec Stock Kit Look no further. This kit, proudly made in the USA, boasts an exceptional design and production quality. It includes a 6-position extension tube and recoil buffer, all in a sleek black finish.

The stock is molded from impact-resistant, high-strength matte black polymer, ensuring durability and longevity. Its minimal bulk profile and lightweight design make it an ideal choice for SBRs. The unique 4.28" length with 4-position adjustability provides a comfortable length of pull and ease of shouldering your firearm, especially when wearing a load-bearing vest or plate carrier system.

For a superior firearm handling experience, pair this stock kit with our super slim handguards. Built for heavy-duty use, this kit adheres to the tightest tolerance controls to provide the most secure fit and function. It includes an ergonomic slanted cheek rest and a rubberized butt pad.

The kit also features a reversible sling swivel housing, making it suitable for both left and right-handed shooters. Additionally, it comes with a standard sling loop for traditional slings. The kit is complete with a Mil-spec extension tube, buffer, buffer spring, receiver end plate, and castle nut.

For added convenience, a removable 5.51" extended cheek rest insert is included. Despite its comprehensive features, the kit maintains a low profile and lightweight design, ensuring it does not add excessive bulk to your firearm. Enhance your shooting experience with the AR15 Ops Ready S4 Mil-Spec Stock Kit.

UTG S4 Mil-Spec Stock Kit Features

  • High-quality AR15 Ops Ready S4 Mil-Spec Stock Kit with 6-position extension tube and recoil buffer
  • Molded from impact-resistant, high-strength matte black polymer for durability
  • Unique 4.28" length with 4-position adjustability for comfortable firearm shouldering
  • Includes ergonomic slanted cheek rest, rubberized butt pad, and reversible sling swivel housing
  • Complete with Mil-spec extension tube, buffer, buffer spring, receiver end plate, and castle nut
  • Low profile and lightweight design, ensuring no excessive bulk addition to your firearm

Warranty Information

This product has a limited lifetime warranty.

Key Features

  • Enhance your AR15 with this UTG Ops Ready S4 Mil-Spec Stock Kit for superior performance.
  • Enjoy a comfortable shooting experience with the removable extended cheek rest insert.
  • Rely on the durable polymer construction for long-lasting use in any shooting condition.
  • Achieve optimal accuracy with a stable 6-position extension tube and recoil buffer.
  • Quickly attach slings using the reversible QD sling swivel housing for versatile carry.
  • Get exceptional value with this complete AR15 stock kit, including all essential parts.

What's in the box:

  • UTG PRO Stock
  • 6 Position Extension Tube
  • Recoil Buffer
  • Tear-Drop Ring
  • Castle Nut
  • Reversible QD Sling Swivel Housing
  • Buffer Spring
  • Removable 5.51 " Extended Cheek Rest Insert
  • UTG Lifetime Limited Warranty