UTG PRO Ops Ready S4 Mil-spec AR-15 Stock Kit - Black on FDE

$ 68.49

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UTG-PRO is proud to announce the Ops Ready S4 Mil-Spec AR Stock; their latest entry in the "minimalist" ultra-light weight AR stock category and it is awesome! Weighing in at only 7.2 ozs with its removable cheek piece installed the Ops Ready S4 stock is solidly in the top of the pack among the lightest stocks on the market right now. Made from high strength impact resistant polymer and built for heavy duty use with the tightest tolerances possible for the most secure fit and function the S4 maintains a minimal profile that is smaller than all other AR stocks in its class making it ideal for SBRs or anyone wanting to cut weight from their rifle without sacrificing comfort and durability.

The S4 includes a removable ergonomic slanted check rest, rubberized butt pad and built-in reversible sling swivel mounts for left or right handed shooters as well as a standard sling loop for traditional mount slings. This stock is only 4.28" long without the included cheek piece installed and 5.51" with the cheek piece and allows 4 position adjustability for shooter comfort, length of pull and ease of shouldering when wearing a load bearing vest or plate carrier system.

  • UTG PRO Ops Ready S4 Mil-Spec AR Stock - Black
  • Ground Zero Precision 7075-T6 Carbine Buffer Tube (Mil-Spec Dimensions) - Cerakoted: Magpul Flat Dark Earth (H-267Q)
  • Ground Zero Precision Mil-Spec Castle Nut
  • Ground Zero Precision Carbine AR-15 Buffer - 3.8 oz
  • Ground Zero Precision Slick-Kote™ Carbine AR-15 Spring
  • All UTG Pro and Ground Zero Precision parts included in this kit are proudly made in the U.S.A.!


•  UTG PRO products are proudly manufactured in Livonia Michigan U.S.A.!
•  Stock Molded from Impact Resistant High Strength Matte Black Polymer,
•  Minimal Bulk Profile, Lightweight, Beyond Sub Compact Size, Ideal for SBRs
•  Unique 4.28" Length with 4 Position Adjustability Provides Comfortable Length of Pull and Ease of Shouldering Firearm when Wearing a Load Bearing Vest or Plate Carrier System
•  Combine with Our Super Slim Handguards for a Superior Firearm Handling Experience
•  Built for Heavy Duty Use with the Tightest Tolerance Controls to Provide the Most Secure Fit and Function
•  Includes Ergonomic Slanted Cheek Rest and Rubberized Butt Pad and Features a Reversible Sling Swivel Housing for Left or Right Handed Shooters and a Standard Sling Loop for Traditional Slings
•  Removable 5.51" Extended Cheek Rest Insert Included
•  Low Profile and Lightweight Design Does Not Add Excessive Bulk
•  Polymer Stock Only



Material: Polymer
Height: 4.75"
Length : 4.28"
Weight: 7.2 oz
Color: Black



The Best Never Rest Warranty - Lifetime

Leapers, Inc. warrants that all UTG & UTG PRO products conform to published specifications and are free from defects in material and workmanship. We will repair or replace defective products for the duration of the product's life span. Our dedicated in-house customer service professionals will provide the best-in-class UTG experience.

  • This warranty does not extend to products disassembled, damaged from misuse, accidental impact, negligence, natural disasters/accidents, or unauthorized repair or alteration.

Warranty Instructions

You can either contact Ground Zero Precision through our Contact Us form here OR get in contact directly with Leapers/UTG through website using the following instructions.

To submit a warranty case to Leapers/UTG, please follow the following steps:

  • Go to Warranty Request under Customer Service on www.leapers.com.
  • Fill out the necessary contact and product information to the best of your knowledge.
  • A purchase receipt is required for all warranty cases and needs to be attached at the end of the form.
  • Finalize the case by submitting the information to us.
  • You will hear from one of our customer service reps within 24-48 hours and we will provide you with additional information and instructions.