+1-800-504-5897 Help Center Check Order Status
About Us Policies Reviews How To
Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Enjoy free shipping during the holidays! Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC and to all U.S. Military APO/FPO/DPO addresses.

Enjoy Our Extended FREE RETURNS

We want to ensure that making a return is as easy as possible! With our Hassle-Free, Extended Holiday Returns, eligible orders placed from November 12, 2025 on will benefit from an extended return deadline (January 13, 2026 or 30 days after receipt of your order - whichever is later). We'll even cover the cost of return shipping. Learn more about our Return Policy.

  • Entire Store
  • ...
  • Apparel & Footwear
  • Astronomy
  • Everything Else
  • Eyewear
  • Hunting Gear
  • Lab Equipment
  • Military Gear
  • Outdoor Gear
  • Photography Equipment
  • Police, EMS & Fire
  • Shooting
  • Sport Optics
  • Sports & Hobbies
TIP
Shopping Cart

San Tan Tactical STT-15 Pillar Billet Upper Receiver STT-PILLAR-1 Color: Black, Finish: Hard Coat, Gun Make: AR Platform, 10% Off Plus Coupon Available w/ Free S&H

San Tan Tactical STT?15 Pillar Billet Upper Receiver, Black STT?PILLAR?1
San Tan Tactical STT-15 Pillar Billet Upper Receiver, Black, STT-PILLAR-1
San Tan Tactical STT-15 Pillar Billet Upper Receiver, Black, STT-PILLAR-1
San Tan Tactical STT-15 Pillar Billet Upper Receiver, Black, STT-PILLAR-1
San Tan Tactical STT-15 Pillar Billet Upper Receiver, Black, STT-PILLAR-1
San Tan Tactical STT-15 Pillar Billet Upper Receiver, Black, STT-PILLAR-1
San Tan Tactical STT-15 Pillar Billet Upper Receiver, Black, STT-PILLAR-1
San Tan Tactical STT-15 Pillar Billet Upper Receiver, Black, STT-PILLAR-1
San Tan Tactical STT?15 Pillar Billet Upper Receiver, Black STT?PILLAR?1
1 of 8 images
San Tan Tactical STT?15 Pillar Billet Upper Receiver, Black STT?PILLAR?1
San Tan Tactical STT-15 Pillar Billet Upper Receiver, Black, STT-PILLAR-1
2 of 8 images
San Tan Tactical STT-15 Pillar Billet Upper Receiver, Black, STT-PILLAR-1
San Tan Tactical STT-15 Pillar Billet Upper Receiver, Black, STT-PILLAR-1
3 of 8 images
San Tan Tactical STT-15 Pillar Billet Upper Receiver, Black, STT-PILLAR-1
San Tan Tactical STT-15 Pillar Billet Upper Receiver, Black, STT-PILLAR-1
4 of 8 images
San Tan Tactical STT-15 Pillar Billet Upper Receiver, Black, STT-PILLAR-1
San Tan Tactical STT-15 Pillar Billet Upper Receiver, Black, STT-PILLAR-1
5 of 8 images
San Tan Tactical STT-15 Pillar Billet Upper Receiver, Black, STT-PILLAR-1
San Tan Tactical STT-15 Pillar Billet Upper Receiver, Black, STT-PILLAR-1
6 of 8 images
San Tan Tactical STT-15 Pillar Billet Upper Receiver, Black, STT-PILLAR-1
San Tan Tactical STT-15 Pillar Billet Upper Receiver, Black, STT-PILLAR-1
7 of 8 images
San Tan Tactical STT-15 Pillar Billet Upper Receiver, Black, STT-PILLAR-1
San Tan Tactical STT-15 Pillar Billet Upper Receiver, Black, STT-PILLAR-1
8 of 8 images
San Tan Tactical STT-15 Pillar Billet Upper Receiver, Black, STT-PILLAR-1

Tap Tap to Zoom

Government Export Restriction Government Export Restriction
Government Restriction Government Restriction
Questions & Answers
What kind of finish does it have? All it says is hard finish which tells us nothing. Expert Answer

The San Tan Tactical STT-15 Pillar Billet Upper Receiver has a Mil-Spec Type III Hard Coat Anodized Finish.

by Hunter, Gear Expert, July 25, 2022
What kind of aluminum is used? Expert Answer

The San Tan Tactical STT-15 Pillar Billet Upper Receiver is made from 7075-T6 aerospace grade aluminum.

by Ethan, Gear Expert, July 22, 2022
View All Q&A You Have a Question? Ask!
Customer Reviews
Helpful Positive Review
There are better for less. by Beans, Verified Owner, November 28, 2022
It’s all 3 of the 3 stars but can never be a 4 or 5. It’s also a one a two as well as three stars. Knowing what I know now, would I order the SanTan Pillar Billet upper again? No. Would I recommend it? Yes. It’s still a must have and must see. The VL...
Read More...
6/6 found this helpful
Read 1 Review

Come In & Grab 15% Off A Wide Variety Of Gear!!

See promotion details.
Eligible models will have a savings offer. Apply coupon and add the item to your cart for savings on that select model! Limited time only. Cannot be combined with other promotions or offers.
Color: Black Finish: Hard Coat Gun Make: AR Platform Gun Model: AR-15 Additional Features: Truss Pockets Condition: New

Code: 3R1-UPR-STT3-STT-PILLAR-1

MPN: STT-PILLAR-1

UPC: 680599034060

15%
Product Discount
List: $210.28Save 10%
$189.25

Product Info for San Tan Tactical STT-15 Pillar Billet Upper Receiver

Perfect for nearly any shooting situation, the San Tan Tactical STT-15 Pillar Billet Upper Receiver is a lightweight and strong way to shoot your AR-15. San Tan Tactical crafted these AR15 Upper Receivers from skeletonized aircraft-grade aluminum with 3D CAD modeling software to create a lightweight and strong foundation for your rifle. This San Tan Tactical STT-15 Pillar Billet AR-15 Upper Receiver features a patented truss design that distributes stress across the entire platform of the receiver - not just the threaded areas. By employing this method of construction, the upper receiver weighs only 8.2 ounces, which is lighter than some slick side uppers on the market. You can also save weight in key areas by using the forward assist block and shell deflector. Create a more precise shooting experience with the San Tan Tactical STT-15 Pillar Billet Rifle Upper Receiver.image

Specifications for San Tan Tactical STT-15 Pillar Billet Upper Receiver:

Manufacturer: San Tan Tactical
Color: Black
Finish: Hard Coat
Gun Make: AR Platform
Gun Model: AR-15
Additional Features: Truss Pockets
Condition: New
Gun Type: Rifle

Package Contents:

  • San Tan Tactical STT-15 Pillar Billet Upper Receiver

What firearm models does the manufacturer say San Tan Tactical STT-15 Pillar Billet Upper Receiver is compatible with?

The manufacturer says that San Tan Tactical STT-15 Pillar Billet Upper Receiver is compatible with AR-15

San Tan Tactical STT-15 Pillar Billet Upper Receiver Orderable Models

List of Orderable Models

  • San Tan Tactical STT-15 Pillar Billet Upper Receiver, Black, STT-PILLAR-1 , MPN: STT-PILLAR-1 , UPC: 680599034060 , Code: 3R1-UPR-STT3-STT-PILLAR-1

San Tan Tactical STT-15 Pillar Billet Upper Receiver Unavailable & Discontinued Models

List of Unorderable Models

  • USED San Tan Tactical STT-15 Pillar Billet Upper Receiver, Black, STT-PILLAR-1, EDEMO1, Condition Fair, Scratches , MPN: STT-PILLAR-1-EDEMO1 , Code: 3R1-UPR-STT3-STT-PILLAR-1-EDEMO-SC-D
  • USED San Tan Tactical STT-15 Pillar Billet Upper Receiver, Black, STT-PILLAR-1, EDEMO3, Condition Fair, Used , MPN: STT-PILLAR-1-EDEMO3 , Code: 3R1-UPR-STT3-STT-PILLAR-1-EDEMO-US-D
  • USED San Tan Tactical STT-15 Pillar Billet Upper Receiver, Black, STT-PILLAR-1, EDEMO2, Used, Condition Fair , MPN: STT-PILLAR-1-EDEMO2 , Code: 3R1-UPR-STT3-STT-PILLAR-1-EDEMO2
  • DEMO, San Tan Tactical STT-15 Pillar Billet Upper Receiver, Black, STT-PILLAR-1 , MPN: STT-PILLAR-1-DEMO , Code: 3R1-UPR-STT3-STT-PILLAR-1-DEMO
Compare (0)
1 item has been added
Add at least two items to compare