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POLYMER80 AR-15 PHOENIX G150 80% LOWER AND UPPER KIT - BLACK
MAS DEFENSE CERAKOTE AR-15 BLACK (BLK) BUILDER SET - FORGED UPPER - POLYMER 80 LOWER
 
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MSRP: $180.00
Our Price: $149.99
SALE PRICE: $89.99

Price with Selected Options: $89.99

Stock Status: In Stock


Product Code: MDCK-AR15-UL-BLK

Upper Receiver Options:


Upper Parts Kit Option:


80% LOWER RECEIVER OPTION:


I UNDERSTAND AND AGREE:

  I AM 18 YEARS OF AGE OR OLDER. 21+ IF MY STATE REQUIRES AND FOR PISTOL PARTS.

  MY SHIPPING ADDRESS IS NOT LOCATED IN ANY OF THE CITIES OR STATES LISTED BELOW.

  MY BILLING ADDRESS MATCHES MY SHIPPING ADDRESS. ***NO EXCEPTIONS!

  ORDERS CONTAINING 76% OR 80%'S CANNOT HAVE ANY OTHER PARTS INCLUDED IN THAT ORDER.

  I AGREE TO EMAIL A COPY OF MY LICENSE AND CREDIT CARD IF REQUESTED.

  A 15% CANCELLATION FEE WILL APPLY IF WE HAVE TO CANCEL YOUR ORDER.

Qty:  
DESCRIPTION
 
*** YOUR BILLING AND SHIPPING ADDRESSES MUST MATCH.***

*** THE NAMES ON THE CREDIT CARD, BILLING AND SHIPPING ADDRESSES MUST MATCH.***

A 15% CANCELLATION FEE WILL BE CHARGED IF WE HAVE TO CANCEL YOUR ORDER.

*** Absolutely NO sales of unfinished frames to the below states or cities within the listed states:


- California
- Colorado
- Connecticut
- Delaware
- District of Columbia - Washington DC
- Hawaii
- Illinois
- Maryland
- Massachusetts
- Michigan City: Detroit
- Minnesota
- Nebraska City: Omaha
- Nevada
- New Jersey
- New York
- Oregon
- Pennsylvania City: Philadelphia
- Rhode Island
- Vermont
- Washington

It is the customers responsibility to know all applicable laws that apply.. Please complete your research BEFORE making a purchase. By using this website to purchase and/or use this product, you affirm that you have verified that you may possess, purchase, and use this product under all applicable city, county, state and/or federal laws. MAS Defense LLC is not and will not be held responsible for any city, county, state and/or federal laws that you (the purchaser) do not comply with. Due to the volatile nature and ever-changing laws regarding unfinished frames and lowers, these items are not returnable. Warranties will be handled on an individual basis. A 15% cancellation fee will be charged to orders containing this part with shipping addresses in the above outlined cities or states.

POLYMER80 AR-15 PHOENIX G150 80% LOWER AND UPPER KIT - BLACK
MPN: MDCK-AR15-UL-BLK

*If you would like the upper to include an Ejection Door and Forward Assist please select the "COMPLETE UPPER" in the Upper Option drop down menu.

Included:
- MAS Defense 7075 T6 Forged A4 Upper Receiver (BLK)
- Polymer 80 AR-15 PHOENIX G150 Lower Receiver - (BLK)

Features:
- Accepts Mil-Spec Lower Parts Kits
- Accepts Mil-Spec Buffer Tube Assemblies
- Accepts Mil-Spec Magazines



Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 11 CLICK HERE TO WRITE A REVIEW »

  0 of 0 people found the following review helpful:
 
5 of 5 Excellent service January 14, 2026
: Hugh from Savannah, GA United States  
Though I haven't had a chance to do anything with the item I ordered, it looks like top quality at an excellent price.  The shipment was immediate and I think it was 2 days from when I placed the order to when I received it.

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  0 of 0 people found the following review helpful:
 
5 of 5 Polymer 80 lower and upper January 8, 2026
: daniel collins from Sylacauga, AL United States  
I have not milled out lower but the jig is well built, good enough for aluminum if careful.  Upper and lower look great.  I will always use mas defense for my lowers or any other accessory I may need or want.  Super fast shipping during holidays. Ordered on 27th received I believe 3 or 4 days later if that. So very happy customer.  Well packaged no complaints thank you guys for what you do and how well you do it.

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  0 of 0 people found the following review helpful:
 
5 of 5 Nice Receiver set November 28, 2025
: Jon from Rock Hill, SC United States  
Nice fit and finish on the upper receiver and good color match between the upper and lower receivers.
  I also love the Mas Defense logo at the top rear of the upper, so much so that I ordered a BCG with a matching logo.
Makes a handsome set. Can't wit to get it all assembled for a trip to the range. Keep up the good work . Thanks

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  0 of 0 people found the following review helpful:
 
5 of 5 Great job! October 8, 2025
: Johnny Hill from Mabelvale, AR United States  
Easy to order. Timely and fast shipping.  Everything arrived safe and was exactly what I ordered. Will definitely purchase from Masdefense again.

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  0 of 0 people found the following review helpful:
 
5 of 5 September 13, 2025
: Joseph Dixon from Calvert City, KY United States  
As always, I couldn't be more pleased with the folks at MAS. It's obvious that the customer comes first every time. Thanks guys!!

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