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 only in Charlotte, NC. We do ask that you call before stopping by as we are not a "come in and browse shop".
*** Shipping timeframes have been delayed due to the increasing demand for AR15 parts. Parts will ship in approximately 2 business days. Barreled Uppers are built to order and will ship in approximately 3 - 4 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 and Hand Guards
- Updated Barreled Upper Sale Pricing! Our lowest prices ever!
- Over 250 parts currently On Sale.
- Barreled Uppers available in any configuration. Please give us a call if you do not see the one you want.
New Parts Added
- Side Charging Handle Non-Reciprocating Billet Upper Receiver
- Thordsen Customs Pistol Cheek Rest Kits with MFT Saddle
- Aero Precision FDE and No Forward Assist Upper Receivers. Can be used on builds.
- MAS Defense T-Shirts in Black, Red and Gray
- We have several Troy M-LOK, FDE and VTAC hand guards that are not on the site. Please call for availability.
- UTG Parts - Stocks, Rails, Sights, Grips, Hand Stops
- 7.5" AR15 Pistol "Go Bag". Discretely carry your AR Pistol and spare mags.