Welcome.

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


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SHIPPING

Current Lead Times in BUSINESS DAYS:

Parts (1-3) days. 

Barreled Uppers (2-4) days.

E-mails can take 24-48 hours to respond to at this time.

Orders CANNOT be cancelled once they reach the "processing" stage.

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STATE & AGE RESTRICTIONS

Please click HERE for updated information.

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INVENTORY

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 driver's license to confirm their identity. Once confirmed, customers will not have to resubmit on future orders. 

FEATURED PRODUCTS



POLYMER80 9MM STRIPPED SLIDE GLOCK 19 FITMENT GEN 3 P80 PF940C P80-BKC - CERAKOTE BATTLEWORN BRIGHT PURPLE P80-PS9C-STD-BN-CKBRPUR P80-PS9C-STD-BN P80 COMPACT G19 DISTRESSED POLYMER80 9MM STRIPPED SLIDE GLOCK 19 FITMENT GEN 3 P80 PF940C P80-BKC - CERAKOTE BATTLEWORN BRIGHT PURPLE
MSRP: $345.00
Our Price: $274.99
SALE PRICE: $134.99
In Stock
POLYMER80 80% PISTOL FRAME KIT WITH JIG SUB-COMPACT G26 / G27 PF940SC P80-PF940SC-BLK - BLACK + JIG Glock 26 Glock 27 P80 POLYMER80 80% PISTOL FRAME KIT WITH JIG SUB-COMPACT G26 / G27 PF940SC P80-PF940SC-BLK - BLACK + JIG
MSRP: $159.00
Our Price: $119.99
SALE PRICE: $109.99
(Out of Stock)
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POLYMER80 80% FRAME ONLY COMPACT G19 / G23 PF940C P80-BKC - CERAKOTE CRIMSON RED DEADPOOL P80-FOBC-CKCRRED P80 GLOCK 19 GLOCK 23 POLYMER80 80% FRAME ONLY COMPACT G19 / G23 PF940C P80-BKC - CERAKOTE CRIMSON RED
MSRP: $140.00
Our Price: $109.99
SALE PRICE: $69.99
(Out of Stock)
(6)
POLYMER80 9MM STRIPPED SLIDE GLOCK 19 FITMENT GEN 3 P80 PF940C P80-BKC - CERAKOTE MULTICAM FLAT DARK EARTH MPN: P80-PS9C-STD-BN-CKMCRED COMPACT G19 POLYMER80 9MM STRIPPED SLIDE GLOCK 19 FITMENT GEN 3 P80 PF940C P80-BKC - CERAKOTE MULTICAM FDE FLAT DARK EARTH
MSRP: $400.00
Our Price: $339.99
SALE PRICE: $169.99
(Out of Stock)
POLYMER80 80% POLYMER LOWER RECEIVER GLOCK 19 FITMENT OD GREEN - P80-BKC-ODG P80-PF940CV1-ODG POLYMER80 80% FRAME ONLY COMPACT G19 / G23 PF940C P80-BKC - CERAKOTE P80 OD GREEN
MSRP: $140.00
Our Price: $109.99
SALE PRICE: $69.99
(Out of Stock)
(11)
POLYMER80 9MM STRIPPED SLIDE GLOCK 19 FITMENT GEN 3 P80 PF940C P80-BKC - CERAKOTE OD GREEN MPN: P80-PS9C-STD-BN-CKODG COMPACT G19 POLYMER80 9MM STRIPPED SLIDE GLOCK 19 FITMENT GEN 3 P80 PF940C P80-BKC - CERAKOTE P80 OD GREEN
MSRP: $315.00
Our Price: $254.99
SALE PRICE: $119.99
In Stock
POLYMER80 PF320 PTEX GRIP MODULE / FRAME FOR SIG SAUER P320 - P80-PF320-FDE - FLAT DARK EARTH POLYMER80 PF320 PTEX GRIP MODULE / FRAME FOR SIG SAUER P320 - P80-PF320-FDE - FLAT DARK EARTH
MSRP: $64.00
Our Price: $59.99
SALE PRICE: $49.99
In Stock
POLYMER80 PF320 PTEX GRIP MODULE / FRAME FOR SIG SAUER P320 - P80-PF320-COB - COBALT POLYMER80 PF320 PTEX GRIP MODULE / FRAME FOR SIG SAUER P320 - P80-PF320-COB - COBALT
MSRP: $64.00
Our Price: $59.99
SALE PRICE: $49.99
In Stock
POLYMER80 80% FRAME ONLY COMPACT G19 / G23 PF940C P80-BKC - CERAKOTE BRIGHT PURPLE P80-FOBC-CKBRPUR POLYMER80 80% FRAME ONLY COMPACT G19 / G23 PF940C P80-BKC - CERAKOTE BRIGHT PURPLE
MSRP: $140.00
Our Price: $109.99
SALE PRICE: $69.99
In Stock

(3)
11.5" 5.56 / .223 AR-15 BARRELED UPPER - MAS DEFENSE GROUNDWORKS 9.875" M-LOK RAIL - CARBINE GAS 11.5" 5.56 / .223 AR-15 BARRELED UPPER - MAS DEFENSE GROUNDWORKS 9.875" M-LOK RAIL - CARBINE GAS W/ BCG & FCH
MSRP: $555.00
Our Price: $499.99
SALE PRICE: $391.99
In Stock

(4)
SIG SAUER P320 COMPACT / XCARRY FACTORY RECOIL SPRING - 9MM - 1300985-R SIG SAUER P320 COMPACT / XCARRY FACTORY RECOIL SPRING - 9MM - 1300985-R
MSRP: $45.00
Our Price: $39.99
SALE PRICE: $29.99
In Stock
POLYMER80 SUB-COMPACT 9MM BARREL GLOCK 26 FITMENT - THREADED FLUTED STAINLESS STEEL P80-PFSC9-TH-F-STS P80-BRL-PFSC9-THF-STS POLYMER80 SUB-COMPACT 9MM BARREL GLOCK 26 FITMENT - THREADED FLUTED STAINLESS STEEL P80-BRL-PFSC9-THF-STS
MSRP: $185.00
Our Price: $169.99
SALE PRICE: $69.99
In Stock
POLYMER80 80% POLYMER LOWER RECEIVER GLOCK 19 FITMENT - GRAY GREY - P80-PF940CV1-GRY P80-BKC-GRY P80-FOBC-GRY P80 POLYMER80 80% FRAME ONLY COMPACT G19 / G23 PF940C P80-BKC - GRAY P80-FOBC-GRY
MSRP: $100.00
Our Price: $79.99
SALE PRICE: $49.99
In Stock

(8)
POLYMER80 80% LOWER RECEIVER SUB-COMPACT G26 / G27 FITMENT P80-BKSC-BLK - BLACK GLOCK 26 GLOCK 27 9MM 40S&W P80-PF940SC-BLK POLYMER80 80% LOWER FRAME SUB-COMPACT G26 / G27 PF940SC P80-BKSC-BLK - BLACK
MSRP: $149.00
Our Price: $109.99
SALE PRICE: $99.99
(Out of Stock)
(12)
POLYMER80 80% FRAME ONLY COMPACT G19 / G23 PF940C P80-BKC - CERAKOTE ZOMBIE GREEN P80-FOBC-CKZBGRN POLYMER80 80% FRAME ONLY COMPACT G19 / G23 PF940C P80-BKC - CERAKOTE ZOMBIE GREEN
MSRP: $140.00
Our Price: $109.99
SALE PRICE: $69.99
In Stock

(5)
POLYMER80 SUB-COMPACT 9MM BARREL GLOCK 26 FITMENT THREADED FLUTED DLC P80-PFSC9-THF-DLC P80-BRL-PFSC9-THF-DLC POLYMER80 SUB-COMPACT 9MM BARREL GLOCK 26 FITMENT THREADED FLUTED DLC P80-BRL-PFSC9-THF-DLC
MSRP: $185.00
Our Price: $169.99
SALE PRICE: $69.99
In Stock

(1)
POLYMER80 80% FRAME ONLY COMPACT G17 / G22 PF940V2 P80-BKS - CERAKOTE CRIMSON RED DEADPOOL P80-FOBC-CKCRRED P80 GLOCK 17 GLOCK 22 POLYMER80 80% FRAME ONLY STANDARD G17 / G22 - CERAKOTE CRIMSON RED
MSRP: $140.00
Our Price: $109.99
SALE PRICE: $69.99
(Out of Stock)
POLYMER80 80% FRAME ONLY COMPACT G19 / G23 PF940C P80-BKC - CERAKOTE NRA BLUE P80-FOBC-CKNRBLU POLYMER80 80% FRAME ONLY COMPACT G19 / G23 PF940C P80-BKC - CERAKOTE NRA BLUE
MSRP: $140.00
Our Price: $109.99
SALE PRICE: $69.99
In Stock

(10)
POLYMER80 9MM STRIPPED SLIDE GLOCK 19 FITMENT GEN 3 P80 PF940C P80-BKC - CERAKOTE BATTLEWORN ZOMBIE GREEN P80-PS9C-STD-BN-CKZBGRN P80-PS9C-STD-BN P80 COMPACT G19 DISTRESSED POLYMER80 9MM STRIPPED SLIDE GLOCK 19 FITMENT GEN 3 P80 PF940C P80-BKC - CERAKOTE BATTLEWORN ZOMBIE GREEN
MSRP: $345.00
Our Price: $274.99
SALE PRICE: $134.99
In Stock

(1)
POLYMER80 80% POLYMER LOWER RECEIVER GLOCK 19 FITMENT - BLACK - P80-PF940CV1-BLK GCA COMPLIANT 76% FRAME POLYMER80 80% LOWER FRAME COMPACT G19 / G23 PF940C P80-BKC-BLK - BLACK
MSRP: $149.00
Our Price: $109.99
SALE PRICE: $99.99
In Stock

(388)
JSD MUP-1 80% P320 FRAME INSERT FOR SIG SAUER® P320 MODULAR CHASSIS JIG JSD SUPPLY MUP-1 80% P320 FRAME INSERT JIG - MUP-1-JIG
MSRP: $175.00
Our Price: $164.99
(Out of Stock)
AR-15 P5C PISTOL BUFFER TUBE - KIT OPTIONS AVAILABLE AR-15 P5C PISTOL BUFFER TUBE - KIT OPTIONS AVAILABLE
MSRP: $25.00
Our Price: $19.99
SALE PRICE: $12.99
In Stock

(34)
POLYMER80 80% FRAME ONLY COMPACT G19 / G23 PF940C P80-BKC - CERAKOTE BURNT BRONZE P80 GLOCK 19 GLOCK 23 POLYMER80 80% FRAME ONLY COMPACT G19 / G23 PF940C P80-BKC - CERAKOTE BURNT BRONZE
MSRP: $140.00
Our Price: $109.99
SALE PRICE: $69.99
(Out of Stock)
(4)
POLYMER80 80% FRAME ONLY COMPACT G19 / G23 PF940C P80-BKC - CERAKOTE BATTLEWORN NRA BLUE P80 DISTRESSED GLOCK 19 GLOCK 23 POLYMER80 80% FRAME ONLY COMPACT G19 / G23 PF940C P80-BKC - CERAKOTE BATTLEWORN NRA BLUE
MSRP: $170.00
Our Price: $129.99
SALE PRICE: $79.99
In Stock

(1)