HOME > AR-15 > AR-15 BARRELED UPPERS > 300 BLACKOUT >

10.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE 12.62" MW8 OCTAGON M-LOK RAIL
10.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE 12.62" MW8 OCTAGON M-LOK RAIL


 
Alternative Views:
MSRP: $438.00
Our Price: $349.99
SALE PRICE: $299.99

Price with Selected Options: $299.99

Stock Status: In Stock


Product Code: MAS-103B1-MDOC-12

Upper Receiver Options:


Barrel Options:


Handguard Options:


Gas Block Options:


Gas Tube Options:


Muzzle Device Options:


***ON SALE - Choose a Bolt Carrier Group:


***ON SALE - Choose a Charging Handle:



Qty:  
DESCRIPTION
 
10.5" 300 BLACKOUT BARRELED UPPER - MAS DEFENSE 12.62" MW8 OCTAGON M-LOK RAIL

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 - 10.5" 300 Blackout Barrel. Click on the drop down box above to choose from our selection.

3. Handguard - MAS Defense 12.62" MW8 Octagon M-LOK Rail - (ID 1.8")

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

5. Gas Tube - Pistol Length Stainless Steel Gas Tube

6. Muzzle Device - Flash Can

Bolt Carrier Groups and Charging Handles are sold separately.

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.

***80% LOWERS CANNOT BE PURCHASED WITH BARRELED UPPERS OR BUILD KITS. ORDERS THAT INCLUDE THEM WILL BE CANCELLED AND CHARGED A 15% CANCELLATION FEE***.

RELATED ITEMS
M16 BOLT CARRIER GROUP 5.56 & 300 BLACKOUT BCG - MELONITE NITRIDE FORGED CHARGING HANDLE AR-15 - STANDARD TACTICAL LATCH M16 BOLT CARRIER GROUP 5.56 & 300 BLACKOUT BCG - HYBRID NICKEL BORON M16 BOLT CARRIER GROUP 5.56 & 300 BLACKOUT BCG - HYBRID GOLD TITANIUM NITRIDE (TiN)
SALE PRICE: $79.99
Our Price: $24.99
SALE PRICE: $99.99
SALE PRICE: $99.99
M16 BOLT CARRIER GROUP 5.56 & 300 BLACKOUT MELONITE NITRIDE BCG FORGED CHARGING HANDLE AR-15 - STANDARD TACTICAL LATCH M16 BOLT CARRIER GROUP 5.56 & 300 BLACKOUT BCG - NICKEL BORON AR-15 M16 BOLT CARRIER GROUP 5.56 & 300 BLACKOUT BCG - HYBRID GOLD TITANIUM NITRIDE (TiN)

Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 6 CLICK HERE TO WRITE A REVIEW »

  0 of 0 people found the following review helpful:
 
5 of 5 Very well made! December 26, 2023
: Cody from Daniel Island, SC United States  
Received an upper from MAS Defense and it attached to my lower flawlessly. This unit is well constructed and works great with my accessories.

Was this review helpful to you?

  0 of 0 people found the following review helpful:
 
5 of 5 300 blk upper April 28, 2023
: Jody Starnes  
I really like this upper. Looks great . They stayed in touch with me during the process and shipped it out to me quickly.   Haven’t shot it yet because still building the lower. But I expect no issues.  Thanks for everything, will buy from you again. 👍

Was this review helpful to you?

  0 of 0 people found the following review helpful:
 
5 of 5 Will update May 15, 2020
: Ryan from LOS ANGELES, CA United States  
You guys make a nice product at a great price, so I can’t complain. But I gotta hit the range with it. So far, you guys seem like a stand up company.

Was this review helpful to you?

  0 of 0 people found the following review helpful:
 
5 of 5 Excellent Upper May 13, 2020
: from NC United States  
Quick shipping, excellent deal to include the BA barrel. Hope to be out shooting soon.

Was this review helpful to you?

  0 of 0 people found the following review helpful:
 
5 of 5 300 blackout barreled upper April 15, 2020
: Alex Williams from Lafayette , LA United States  
Great product. Shoots awesome. I’m loving the finish on the laxer engraved emblems as well

Was this review helpful to you?

View All Customer Reviews