Please "REGISTER" when purchasing an item. This will allow you to receive e-mails with our monthly give away's, coupon codes, new parts added and free give away's.


Follow us on Instagram at #MASDefense to receive special offers and sale prices.

Monthly Giveaways

Leave a "Review" to be entered to win a MAS Logo 80% Lower.

Please use the name on your invoice. Your review may not be accepted if we can not find your invoice.

Please click on the links in the header at the top of this page to navigate through our site.

"Store"- To view all of our products for sale.
"Reviews"- To view Recent Customer Reviews and Feedback.

We can build you any Barreled Upper you want in 5 easy steps!
1. Choose your receiver.
2. Choose your hand guard.
3. Choose your barrel.
4. Choose your flash hider / brake.
5. Send us a contact request to have your custom build completed. It's that simple!

Our specialty is building quality rifle, SBR and pistol uppers at a reasonable price. We also sell upper and lower parts that you need to complete your build.

Check out our
"Store" above to see all items for sale. All items are marked  "In Stock" or "Sold Out". Inventory is Live Data. Unlike many other stores, we will not sell any item that is not in stock.

This is an approximation. We are working as quickly as possible and still offer some of the fastest turnaround times in the industry. Orders can NOT be edited, changed or modified in any way once they have been placed. PLEASE make sure your are 100% sure you are ordering the correct parts.  Give us a call with any questions.

Thank You for your patience and business.


            Monday - Friday: 8am - 4:30pm
Local Pickup Available in Charlotte, NC

 Please click on "Store" above to view our Products, New Added Parts, Monthly  Specials and Updated Shipping Lead Times.

"Quality Parts at Reasonable Prices!"

Tactical Weapons Store