UTG Ops Ready S3 Mil-Spec Stock Kit for M4 Rifles, Includes Mil-Spec 6-Position Extension Tube, Buffer, Buffer Spring, Tear-Drop Ring and Castle Nut, Black

SKU: UTRBUS3BM MFR: RBUS3BM
$59.97
$69.97
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Key Features

  • Upgrade your M4 rifle with this UTG Mil-Spec stock kit for enhanced durability.
  • Achieve superior accuracy and stability with the 6-position extension tube.
  • Enjoy easy installation; this M4 stock kit includes all essential components.
  • Rely on the robust buffer and spring for consistent cycling and reliable performance.
  • Customize your rifle's ergonomics with this adjustable, high-value UTG stock.
  • Backed by UTG's warranty, ensuring peace of mind with your new rifle stock.
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Special Order?Estimated to Ship: 09/09/2025
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UTG Stock Kit Specifications

  • Compatibility

    M4 rifles

  • Material

    Aluminum/Polymer

  • Height

    4.75" (12.07cm)

  • Length

    6.05" (15.37cm)

  • Weight

    16.9oz (479.11g)

  • UPC Code

    4717385551831

About UTG Stock Kit

The Ops Ready S3 Mil-Spec Stock Kit is meticulously engineered for M4 rifles, offering a robust and high-quality upgrade for tactical enthusiasts and professionals alike. This military-grade stock kit is constructed with the tightest tolerance controls, ensuring the most secure fit and optimal function in demanding situations.

Crafted from impact-resistant, high-strength polymer, the mil-spec stock is presented in a sleek black finish, providing a durable and sturdy addition to your rifle. The extension tube is precision machined from aircraft-grade aluminum, featuring rolled threads for enhanced strength and an anodized coating to resist corrosion and wear, ensuring reliable performance in various environments.

Designed with the shooter's comfort in mind, the stock includes a built-in rubberized butt pad and a slanted cheek rest, which work together to enhance shooting stability and promote consistent firearm control. The integral ambidextrous sling loop and QD sling swivel housing cater to both left and right-handed shooters, offering versatile carrying options.

The unique 6.05" length and sub-compact profile of the stock provide a superior lightweight feel without compromising on comfort, with six positions of adjustability to accommodate different shooter preferences. When combined with UTG PRO Super Slim Handguards, the Ops Ready S3 Mil-Spec Stock Kit delivers an exceptional firearm handling experience.

This comprehensive kit includes the polymer stock, mil-spec 6-position extension tube, buffer, buffer spring, tear-drop ring, and castle nut. It is designed for snag-free performance, featuring fully dehorned corners and melted contours that enhance comfort during use.

Whether upgrading for tactical operations, training, or competitive shooting, the Ops Ready S3 Mil-Spec Stock Kit is a reliable choice for those seeking to enhance their M4 rifle with a professional-grade stock solution.

UTG Stock Kit Features

  • Robust mil-spec stock kit enhances M4 rifle stability and control
  • High-strength polymer and aircraft-grade aluminum construction
  • Ergonomic design with rubberized butt pad and slanted cheek rest
  • Ambidextrous sling loop and QD swivel housing for versatile carrying
  • Six-position adjustability for customized rifle fit and comfort
  • Snag-free design with dehorned corners and melted contours

Warranty Information

This product has a limited warranty of 12 months.

Key Features

  • Upgrade your M4 rifle with this UTG Mil-Spec stock kit for enhanced durability.
  • Achieve superior accuracy and stability with the 6-position extension tube.
  • Enjoy easy installation; this M4 stock kit includes all essential components.
  • Rely on the robust buffer and spring for consistent cycling and reliable performance.
  • Customize your rifle's ergonomics with this adjustable, high-value UTG stock.
  • Backed by UTG's warranty, ensuring peace of mind with your new rifle stock.

What's in the box:

  • UTG PRO Ops Ready S3 Mil-Spec Stock
  • Mil-Spec 6-Position Extension Tube
  • Buffer
  • Buffer Spring
  • Tear-Drop Ring and Castle Nut
  • UTG 1 Year Limited Warranty