SALES-SPECIALS
BARRELED UPPERS
UPPER PARTS
LOWER PARTS


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


local_shipping

SHIPPING LEAD TIMES

Parts will ship in (1) business day. Barreled Uppers ship in approximately (1-2) business days. Barreled Uppers are built to order using our (50) point checklist, head spaced and test fired to ensure 100% function before they leave our facility. 

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LOCAL PICKUP

Local Pickup is available by appointment 10AM - 5PM, Monday - Friday in Charlotte, NC. You must have a NC SHIPPING address for this option to populate. If your state/zip is different, use NC, 28217. We do not have a retail store and are not taking walk-in customers at this time. 

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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 believe in "Back Ordering" 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 if you have any questions or if you are unsure of fitment. 


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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. We apologize for the inconvenience.

FEATURED PRODUCTS



4.75" 9MM BARRELED UPPER - AERO M4E1 FDE UPPER RECEIVER - UTG PRO 4" SLIM QUAD RAIL MTU008 4.75" 9MM BARRELED UPPER - AERO M4E1 FDE UPPER RECEIVER - UTG PRO 4" SLIM QUAD RAIL MTU008
MSRP: $348.00
Our Price: $269.99
SALE PRICE: $219.99
In Stock
16" 5.56 OR 300 BLACKOUT BARREL - GAS BLOCK - GAS TUBE COMBO 16" 5.56 OR 300 BLACKOUT BARREL - GAS BLOCK - GAS TUBE COMBO
MSRP: $196.00
Our Price: $162.97
SALE PRICE: $99.99
In Stock
(5)
10.5" 300 BLACKOUT BARRELED UPPER - SEEKINS MCSR V2 12" - ***FREE BCG - CHARGING HANDLE - 3 PIECE RAIL KIT 10.5" 300 BLACKOUT BARRELED UPPER - SEEKINS MCSR V2 12" - ***FREE BCG - CHARGING HANDLE - 3 PIECE RAIL KIT
MSRP: $535.00
Our Price: $399.99
SALE PRICE: $349.99
In Stock
4.75" 9MM BARRELED UPPER - YANKEE HILL 4.25" KR7 KEYMOD - YHM ANNIHILATOR FLASH HIDER 4.75" 9MM BARRELED UPPER - YANKEE HILL 4.25" KR7 KEYMOD - YHM ANNIHILATOR FLASH HIDER
MSRP: $335.00
Our Price: $264.99
SALE PRICE: $214.99
In Stock
10.5" 5.56 / .223 BARRELED UPPER - SEEKINS MCSR V2 12" - ***FREE BCG - CHARGING HANDLE - 3 PIECE RAIL KIT 10.5" 5.56 / .223 BARRELED UPPER - SEEKINS MCSR V2 12" - ***FREE BCG - CHARGING HANDLE - 3 PIECE RAIL KIT
MSRP: $535.00
Our Price: $399.99
SALE PRICE: $349.99
In Stock
NORTH SIDE KNIFE TITANIUM (6AL4V) KOMODO - BLACK NORTH SIDE KNIFE TITANIUM (6AL4V) KOMODO - BLACK
MSRP: $300.00
Our Price: $269.99
SALE PRICE: $199.99
In Stock
16" 5.56 / .223 BARRELED UPPER - SEEKINS MCSR V2 12" - ***FREE BCG - CHARGING HANDLE - 3 PIECE RAIL KIT 16" 5.56 / .223 BARRELED UPPER - SEEKINS MCSR V2 12" - ***FREE BCG - CHARGING HANDLE - 3 PIECE RAIL KIT
MSRP: $525.00
Our Price: $399.99
SALE PRICE: $339.99
In Stock
7.5" 9MM BARRELED UPPER - YANKEE HILL 9.29" S.L.K. KEYMOD SERIES - YHM-5240 ***FREE BCG - CHARGING HANDLE - 3 PIECE RAIL KIT 7.5" 9MM BARRELED UPPER - YANKEE HILL 9.29" S.L.K. KEYMOD SERIES - YHM-5240 ***FREE BCG - CHARGING HANDLE - 3 PIECE RAIL KIT
MSRP: $635.00
Our Price: $535.00
SALE PRICE: $329.99
In Stock
(1)
POLYMER80 AR15 RHINO RL556V3 80% POLYMER LOWER RECEIVER KIT BLACK - P80-RL556v3-BLK POLYMER80 AR15 RHINO RL556V3 80% POLYMER LOWER RECEIVER KIT BLACK - P80-RL556v3-BLK
MSRP: $79.99
Our Price: $74.99
SALE PRICE: $59.99
In Stock
(19)
POLYMER80 GLOCK 17/22 80% POLYMER LOWER RECEIVER BLACK - PF940v2-BLK POLYMER80 GLOCK 17/22 80% POLYMER LOWER RECEIVER BLACK - PF940v2-BLK
MSRP: $160.00
Our Price: $149.99
SALE PRICE: $114.99
In Stock
(4)
7.5" 5.56 / .223 BARRELED UPPER - SEEKINS MCSR V2 7" - ***FREE BCG - CHARGING HANDLE - 3 PIECE RAIL KIT 7.5" 5.56 / .223 BARRELED UPPER - SEEKINS MCSR V2 7" - ***FREE BCG - CHARGING HANDLE - 3 PIECE RAIL KIT
MSRP: $490.00
Our Price: $379.99
SALE PRICE: $329.99
In Stock
(1)
16" 300 BLACKOUT BARRELED UPPER - SEEKINS MCSR V2 12" - ***FREE BCG - CHARGING HANDLE - 3 PIECE RAIL KIT 16" 300 BLACKOUT BARRELED UPPER - SEEKINS MCSR V2 12" - ***FREE BCG - CHARGING HANDLE - 3 PIECE RAIL KIT
MSRP: $525.00
Our Price: $399.99
SALE PRICE: $339.99
In Stock
7.5" 300 BLACKOUT BARRELED UPPER - YANKEE HILL 9.29" S.L.K. KEYMOD SERIES - YHM-5240 ***FREE BCG - CHARGING HANDLE - 3 PIECE RAIL KIT 7.5" 300 BLACKOUT BARRELED UPPER - YANKEE HILL 9.29" S.L.K. KEYMOD SERIES - YHM-5240 ***FREE BCG - CHARGING HANDLE - 3 PIECE RAIL KIT
MSRP: $653.00
Our Price: $549.99
SALE PRICE: $329.99
In Stock
7.5" 5.56 / .223 BARRELED UPPER - YANKEE HILL 9.29" S.L.K. KEYMOD SERIES - YHM-5240 ***FREE BCG - CHARGING HANDLE - 3 PIECE RAIL KIT 7.5" 5.56 / .223 BARRELED UPPER - YANKEE HILL 9.29" S.L.K. KEYMOD SERIES - YHM-5240 ***FREE BCG - CHARGING HANDLE - 3 PIECE RAIL KIT
MSRP: $653.00
Our Price: $549.99
SALE PRICE: $329.99
In Stock
UTG RED/GREEN DOT + UTG 3X MAGNIFIER W/ FLIP TO THE SIDE - COMBO UTG RED/GREEN DOT + UTG 3X MAGNIFIER W/ FLIP TO THE SIDE - COMBO
MSRP: $165.00
Our Price: $154.98
SALE PRICE: $111.46
In Stock
POLYMER80 GLOCK 19/23 80% POLYMER LOWER RECEIVER BLACK - PF940Cv1-BLK POLYMER80 GLOCK 19/23 80% POLYMER LOWER RECEIVER BLACK - PF940Cv1-BLK
MSRP: $160.00
Our Price: $149.99
SALE PRICE: $114.99
In Stock
(11)
4.75" 9MM 1x10 4150 CrMoV MELONITE NITRIDE BARREL 4.75" 9MM 1x10 4150 CrMoV MELONITE NITRIDE BARREL
MSRP: $115.00
Our Price: $94.99
SALE PRICE: $59.99
In Stock
(10)
4.75" 9MM BARRELED UPPER - SEEKINS MCSR V2 7" - ***FREE BCG - CHARGING HANDLE - 3 PIECE RAIL KIT 4.75" 9MM BARRELED UPPER - SEEKINS MCSR V2 7" - ***FREE BCG - CHARGING HANDLE - 3 PIECE RAIL KIT
MSRP: $495.00
Our Price: $395.00
SALE PRICE: $339.99
In Stock
(1)