Mas Defense
Mas Defense LLC is a respected name in the AR-platform market, offering high-quality uppers, lowers, and complete firearms designed for accuracy and reliability. Known for innovation and affordability, MasDefense products are built for enthusiasts, competitors, and professionals who demand performance-driven rifles and parts. Whether you’re upgrading with a Mas Defense upper, building with an 80 lower, or running the AR9, Mas Defense delivers versatility and precision.
Mas Defense For Sale
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AREX - DELTA GEN.2 M 9MM 15RD - 81553702
$425.00
Arex Delta L OR 9mm Blk 17rd
$481.99
Arex Delta M OR 9mm Blk 15rd
$425.00
Arex Delta M OR 9mm Blk 15rd
$425.00
Arex Delta X OR 9mm Blk 17rd
$445.00
Arex Delta X OR 9mm Blk 17rd
$445.00
Product Focus
Frequently asked questions
What is the history of Mas Defense?
Mas Defense LLC established itself as a trusted AR manufacturer by focusing on high-quality uppers, lowers, and complete builds at affordable prices. The company gained popularity with shooters looking for customizable and reliable AR solutions.
What are the most popular Mas Defense products?
Popular products include the Mas Defense AR9, precision-engineered uppers in multiple calibers, and the 80% lowers for builders seeking a custom rifle platform.
How do I choose the right Mas Defense product?
If you want a pistol-caliber carbine, the AR9 is ideal. For modularity and caliber options, go with a Mas Defense upper. For complete control over customization, the 80 lower is the best choice.
Are Mas Defense uppers and lowers durable?
Yes. MasDefense parts are manufactured with high-strength materials and strict machining tolerances, ensuring long-term durability and reliability.
What accessories are compatible with Mas Defense rifles?
Mas Defense uppers and lowers are compatible with a wide variety of AR-15 parts, accessories, and aftermarket upgrades, including optics, rails, triggers, and stocks.
Where can I buy Mas Defense products?
Mas Defense rifles, uppers, and lowers are available right here on GunsAmerica.
About
Mas Defense LLC is a trusted manufacturer specializing in AR-platform rifles, uppers, lowers, and parts. Known for delivering precision, durability, and affordability, Mas Defense products cater to firearm builders, competitive shooters, and defense-minded users. From the popular AR9 to custom uppers and 80% lowers, the brand has built a reputation for offering versatile solutions that meet the demands of modern shooters.