UTG PRO S3 AR 15 Buttstock – Mil-Spec

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

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UTG PRO S3 Buttstock – Mil-Spec

  • Built for Heavy-duty Use with the Tightest Tolerance Controls to Provide the Most Secure Fit and Function
  • Mil-spec Stock Molded from Impact Resistant High-strength Polymer in Black
  • Built-in Rubberized Butt Pad and a Slanted Cheek Rest Enhances Shooting Stability and Promotes Consistent Firearm Control
  • Integral Ambidextrous Sling Loop and QD Sling Swivel Housing for Left or Right Handed Shooters
  • Unique 6.05″ Length and Sub Compact Profile for superior lightweight, yet comfortable performance with 6 position adjustability
  • Combine with our Super Slim Handguards for a Superior Firearm Handling Experience
  • Snag Free Performance with Fully Dehorned Corners and Melted Contours for Increased Comfort
  • Made in the USA


  • Material: Aluminum/Polymer
  • Height: 4.75″
  • Length: 6.05″
  • Weight: 7.0 oz
  • Color: Black or FDE

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 31 reviews
Caleb Patrick
Depends on your set up.

It looks slick on my set up. I have a 16” barrel with a 15” PSA rail that’s pretty low profile. This butt stock is a tad smaller in dimensions to an M4 stock. The stock really complements my rail. The quick connect sling adapter is only on 1 side but you’re able to swap it around. There isn’t any play in this stock when you mount it. Sits pretty firm and solid. All in all, good purchase.


The was exactly as described. An it fit the needs for my rifle. Super fast shipped an awesome prices.

Thank you for your feedback! We're glad to hear that the UTG PRO S3 AR 15 Buttstock - Mil-Spec was a perfect fit for your rifle and that it arrived quickly and at a great price.

UTG Buttstock

It fit well with no slop. Looks good and was the right price.

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

Andrew Robinson
Great product for the price

This stock was very nicely priced. Shipped very quickly. Fit right on my rifle.

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

Roy Richardson
Nice little butt stock

Works great functions great

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