WELCOME TO OUR STORE!

MAS Defense is committed to providing "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.

Thank you for your business and support!
Team MAS Defense


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SHIPPING LEAD TIMES

Parts ship in approximately (1-3) business day. Barreled Uppers ship in approximately (3-5) business days. Due to the high volume of orders, we can not change, cancel, modify, edit or combine orders after they are placed. E-mails can take up to 72 hours to respond to.

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LOCAL PICKUP

Given the dynamic nature of the current Coronavirus (COVID-19) situation, Local Pickup is no longer available.  

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ORDERS

All of our inventory is LIVE DATA. If a part shows in stock, we have it in stock. We do not "Back Order" parts. Barreled Upper Orders can not be changed or modified in any way after they have been placed. Please contact us BEFORE  you place an order with any questions.


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FRAUD POLICY

Due to increased fraudulent activity, customers with different billing and shipping addresses or credit card names will be required to submit a copy of their drivers license to confirm their identity. Once confirmed, customers will not have to resubmit on future orders. 

FEATURED PRODUCTS



POLYMER80 AR15 RHINO RL556V3 80% POLYMER LOWER RECEIVER KIT FDE - P80-RL556v3-FDE POLYMER80 AR15 RHINO 80% POLYMER LOWER RECEIVER KIT - FLAT DARK EARTH (FDE) - P80-RL556V3-FDE
RETAIL: $79.99
Our Price: $74.99
SALE PRICE: $69.99
In Stock

(14)
80% BILLET LOWER RECEIVER GLOCK 9MM AR-9 - BLACK 80% BILLET LOWER RECEIVER GLOCK 9MM AR-9 - BLACK
RETAIL: $150.00
Our Price: $129.99
In Stock

(14)
AR-10 .308 DPMS GEN 1 80% FORGED LOWER RECEIVER - ANODIZED BLACK AR-10 .308 DPMS GEN 1 80% FORGED LOWER RECEIVER - ANODIZED BLACK
RETAIL: $95.00
Our Price: $79.99
In Stock

(40)
POLYMER80 AR15 RHINO RL556V3 80% POLYMER LOWER RECEIVER KIT BLACK - P80-RL556v3-BLK POLYMER80 AR15 RHINO 80% POLYMER LOWER RECEIVER KIT BLACK - P80-RL556V3-BLK
RETAIL: $79.99
Our Price: $74.99
SALE PRICE: $69.99
In Stock

(64)
3C 7.62 MUZZLE BRAKE - 5/8x24 TPI 3C 7.62 MUZZLE BRAKE - 5/8x24 TPI
RETAIL: $50.00
Our Price: $39.99
SALE PRICE: $29.99
In Stock

(3)
MAS DEFENSE 9.87" RIDGELINE M-LOK AR-15 QUAD RAIL MAS DEFENSE 9.87" RIDGELINE M-LOK AR-15 QUAD RAIL
RETAIL: $130.00
Our Price: $114.99
(Out of Stock)
(1)
.750 LOW PROFILE GAS BLOCK - STEEL MELONITE NITRIDE .750 LOW PROFILE GAS BLOCK - STEEL MELONITE NITRIDE
RETAIL: $30.00
Our Price: $24.99
SALE PRICE: $19.99
In Stock

(220)
MAS DEFENSE 12.62" RIDGELINE M-LOK AR-15 QUAD RAIL - FDE MAS DEFENSE 12.62" RIDGELINE M-LOK AR-15 QUAD RAIL - FDE
RETAIL: $155.00
Our Price: $139.99
In Stock
POLYMER80 GLOCK 19/23 80% POLYMER LOWER RECEIVER BLACK - P80-PF940CV1-BLK POLYMER80 GLOCK 19/23 80% POLYMER LOWER RECEIVER BLACK - P80-PF940CV1-BLK
RETAIL: $160.00
Our Price: $149.99
SALE PRICE: $129.99
(Out of Stock)
(40)
MAS DEFENSE 7.25" RIDGELINE M-LOK AR-15 QUAD RAIL - FDE MAS DEFENSE 7.25" RIDGELINE M-LOK AR-15 QUAD RAIL - FDE
RETAIL: $135.00
Our Price: $119.99
In Stock

(1)
3C 5.56 MUZZLE BRAKE - 1/2x28 TPI 3C 5.56 MUZZLE BRAKE - 1/2x28 TPI
RETAIL: $50.00
Our Price: $39.99
SALE PRICE: $29.99
In Stock

(2)
MAS DEFENSE 15" RIDGELINE M-LOK AR-15 QUAD RAIL MAS DEFENSE 15" RIDGELINE M-LOK AR-15 QUAD RAIL
RETAIL: $150.00
Our Price: $134.99
In Stock

(1)
MAS DEFENSE AR15 UPPER RECEIVER MAS DEFENSE AR-15 FORGED UPPER RECEIVER
RETAIL: $70.00
Our Price: $54.99
In Stock

(57)