UTG Pro AR-15 Ops Ready S4 Mil-Spec Stock

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OPEN BOX RETURN - AT3™ Mil Spec Buffer Tube Kit - AR-15

AT3™ Mil Spec Buffer Tube Kit For AR-15 - Black


Lightweight 2-Piece Stock with Enhanced Cheek Weld

This unique stock features a unique two-piece design, with four-position adjustability for highly compact, lightweight builds.  The detachable cheek piece enhances cheek weld, with a 2.23″ forward offset to aid in comfort and consistency. The stock also features a reversible QD sling cup in the rear, as well as a loop for traditional mounting.

Four position adjustment with extreme low profile.

The stock itself mounts on any standard mil-spec buffer tube, though it will be limited to four positions instead of six.  If you’re building up a complete back end, consider the UTG S4 stock kit, which includes the stock and all the other components to complete your AR-15 recoil system.


  • Material: Polymer
  • Diameter: Mil-spec
  • Height: 4.75″
  • Length: 4.28″
  • Weight: 7.2 oz

Have Questions About this Product?

The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.

If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.

UTG Lifetime Warranty

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.

Please note that this warranty does not extend to products disassembled, damaged from misuse, accidental impact, negligence, natural disasters/accidents, or unauthorized repair or alteration.

Warranty Instructions

  • Go to Warranty Request under Customer Service on our website.
  • 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.
  • No return will be accepted without an RA#.
  • For any questions regarding the process, please feel free to call at (734)542-1500.

Disclaimer: Manufacturer’s warranty is subject to change without prior notice.

Customer Reviews

Based on 20 reviews
Christopher johnson
Great product

Great product came on time. . perfect addition to my AR15

Cory Dailey

Now my favorite minimalist stock.
Great in form and function. Light weight.
It doesn't act as a counter balance like some stocks do. Longer heavier barreled rifles will feel front heavy as light as it is.
I've now put this on all of my rifles.

Thanks for sharing your feedback! We're glad you're satisfied with your purchase.

david ware
Utg stock

Great fit and finish. Love the two tone. Black and dark earth. Finishes the complete look of the rifle.

Thanks for sharing your feedback! We're glad you're satisfied with your purchase.


I always want this color for my ar finnaly fits perfect for my build

Thanks for sharing your feedback! We're glad you're satisfied with your purchase.

Wayne Benedict
Great Stock!

Great stock for the purpose I use it for! Priced right! Fits great to my Mil Spec buffer tube.

Thanks for sharing your feedback! We're glad you're satisfied with your purchase.