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16" 5.56 / .223 AR-15 BARRELED UPPER - MAS DEFENSE GROUNDWORKS 15" M-LOK RAIL - MID LENGTH W/ BCG & FCH
16" 5.56 / .223 AR-15 BARRELED UPPER - MAS DEFENSE GROUNDWORKS 15" M-LOK RAIL - MID LENGTH GAS


 
RETAIL: $585.00
Our Price: $519.99
SALE PRICE: $419.99

Stock Status: In Stock

Product Code: MAS-165N3-MDGW-15
Qty:

DESCRIPTION
 
16" 5.56 / .223 AR-15 BARRELED UPPER - MAS DEFENSE GROUNDWORKS 15" M-LOK RAIL - MID LENGTH GAS
***BOLT CARRIER GROUP AND FORGED CHARGING HANDLE INCLUDED

The options listed below come standard with this barreled upper. The drop down options listed above allow you to customize your build. You can leave them as is, change one option or change them all! We let you build your upper the way you want it built!

1. Upper Receiver - 7075 T6 Aluminum A4. Precision Machined to Mil-Spec Tolerances. Black Hardcoat Anodized Mil-Std-171 Type III. M4 Ramps, Forward Assist, Ejection Door.

2. Barrel - 16" 5.56 NATO / .223 1x7 Twist Govt Profile 4150 CrMoV Melonite Nitride Treated

3. Handguard - MAS Defense "Groundworks" 15" Slimline M-LOK Free Floating Handguard - (ID 1.25")

4. Gas Block - .750 Low Profile Steel Melonite Nitride Treated Gas Block

5. Gas Tube - Mid-Length Stainless Steel Gas Tube

6. Muzzle Device - A2 Half Cage

7. Charging Handle - Forged

8. Bolt Carrier Group - M16 BCG Melonite Nitride


All barreled uppers are head spaced and test fired to ensure function.

ALL LAWS APPLY. IT IS THE RESPONSIBILITY OF THE BUYER TO UNDERSTAND ALL LAWS REGARDING PURCHASE AND OWNERSHIP OF THIS UPPER. WE STRONGLY URGE YOU TO CONTACT YOUR LOCAL FFL AND/OR THE ATF WITH ANY AND ALL QUESTIONS TO MAKE SURE YOU UNDERSTAND THE LAW BEFORE PURCHASING THIS ITEM.


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Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 16 CLICK HERE TO WRITE A REVIEW »

  0 of 0 people found the following review helpful:
 
1 of 5 Shipping was supposed to arrive the 16th July 20, 2021
: Neil Craven from Clallam Bay, WA United States  
Now says pending...seems stuck in NC state.... Once I receive my order I'll check back.
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MAS Defense Reply: Neil, we apologize for the inconvenience. FedEx has been contacted to start a trace on this package. We will continue to monitor this tracking number and keep you updated.
Thank you for your business and your feedback!

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  0 of 0 people found the following review helpful:
 
5 of 5 Upper receiver July 13, 2021
: Michael Owens from Jacksonville, NC United States  
Very pleased with my upper receivers friendly staff awesome customer service.

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  0 of 0 people found the following review helpful:
 
5 of 5 Groundworks is the way to go June 7, 2021
: KURTIS from Delaware, OH United States  
I got one of the short pistol uppers a few weeks ago and had to turn around and do it again for a rifle upper. Fantastic build, I like that the handguard feels substantial. Can't wait to take it out. I'm sure it will shoot well

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  0 of 0 people found the following review helpful:
 
5 of 5 First May 25, 2021
: John Sepelak from Horseheads, NY United States  
Was my first build and i am quite happy with the quality of the parts and the speed it was delivered

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  0 of 0 people found the following review helpful:
 
5 of 5 Top notch April 29, 2021
: Devon  
Everything looks great, packaged to be safely shipped. Will be ordering from MAS again.

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