MAS Defense is committed to providing you quality parts at reasonable prices. Our foundation is built on excellent customer service, honesty and integrity. These simple guidelines are what has made MAS Defense the preferred company it is today. We strive to meet all of your needs and hope to become your one and only tactical weapon store. Contact us directly with any questions or to discuss your build.
All of our inventory is live data. If a part shows in stock, we have it in stock. We do not believe in "Back Ordering" parts and will NEVER sell any part that we do not have in stock. Barreled Uppers are built to order. Local Pick Up is available by appointment in Charlotte, NC. We do ask that you call before stopping by as we are not a "come in and browse shop".
***Shipping timeframes may be delayed due to the holiday season. Parts will ship in approximately 2-4 business days. Barreled Uppers will ship in approximately 3-5 business days. 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 before you place an order if you have any questions or if you are unsure of fitment.
In Stock Specials
- NEW Ridgeline KeyMOD Series Barreled Uppers - 40% OFF FREE 3 Piece KeyMOD Rail Kit
- ***Seekins SP BAR Barreled Uppers Sale. Discounted up to $200 OFF Retail Price!***
- Updated Holiday Barreled Upper Sale Pricing! Our lowest prices ever!
- Over 250 parts currently included in our Holiday Sale.
- Barreled Uppers available in any configuration. Please call to discuss.
New Parts Added
- MAS Defense T-Shirts in Black, Red and Gray
- Aero Precision FDE and No Forward Assist Upper Receivers. Can be used on builds.
- 22lr AR15 Parts. 4.5" Barrels and Barreled Uppers. 22lr BCG's
- 9mm Melonite Nitride BCG Sale $144.99
- 18", 20" and 24" .223 Wylde 1x8 Barrels (can fire 5.56 NATO)
- We have several Troy FDE, VTAC and M-LOK hand guards not on the site. Call for availability.
- 7075 Billet Non-Reciprocating Side Charging Handle Upper Receivers