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11.5" 5.56 / .223 AR-15 BARRELED UPPER - MAS DEFENSE GROUNDWORKS 9.875" M-LOK RAIL - CARBINE GAS W/ BCG & FCH
11.5" 5.56 / .223 AR-15 BARRELED UPPER - MAS DEFENSE GROUNDWORKS 9.875" M-LOK RAIL - CARBINE GAS


 
MSRP: $555.00
Our Price: $499.99
SALE PRICE: $391.99

Stock Status: In Stock


Product Code: MAS-115N2-MDGW-10
Qty:

DESCRIPTION
 
11.5" 5.56 / .223 AR-15 BARRELED UPPER - MAS DEFENSE GROUNDWORKS 9.875" M-LOK RAIL - CARBINE GAS
***BOLT CARRIER GROUP AND FORGED CHARGING HANDLE ARE 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 - 11.5" 5.56 NATO / .223 1x7 Twist M4 Contour Profile 4150 CrMoV Melonite Nitride Treated

3. Handguard - MAS Defense "Groundworks" 9.875" Slimline M-LOK Free Floating Handguard - (ID 1.25")

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

5. Gas Tube - Carbine 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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AR-15 BOLT CARRIER GROUP 5.56 & 300 BLACKOUT MELONITE NITRIDE BCG AR-15 BOLT CARRIER GROUP 5.56 & 300 BLACKOUT BCG - NICKEL BORON

Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 4 CLICK HERE TO WRITE A REVIEW »

  0 of 0 people found the following review helpful:
 
5 of 5 11.5" 5.56 Assembled Upper February 22, 2023
: Ryan from Fremont, CA United States  
I was very pleased with the lead time and build quality.

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  0 of 0 people found the following review helpful:
 
5 of 5 Sold! October 25, 2022
: Frank Porro from Pembroke Pines, FL United States  
Ordered 2 uppers, quality products all around.

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  0 of 0 people found the following review helpful:
 
5 of 5 HIGHLY RECOMMEND!! February 25, 2022
: Dave from Fuquay Varina, NC United States  
Excellent quality and very reasonable prices. Perfect machining with no tool marks or flaws. Flawless finish that should stand up to anything.  I am very happy with the upper and BCG combo I ordered.  BCG is also well put together and excellent quality.  Thank you for the quick shipping and easy checkout process.  I highly reccomend MAS Defense!!
THANK YOU!

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  2 of 2 people found the following review helpful:
 
5 of 5 Awesome complete upper May 20, 2021
: KURTIS from Delaware, OH United States  
This kit, and I'm sure the other groundworks upper kits are solid. Rail mounted nice clean and tight. Finish on all the parts is great. Gas block and barrel nut installed fine, torqued right. I swapped the A2 muzzle device for a brake I had laying around. It's going to be a fun pistol build! If you see these up on their site. Just send it.

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