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

8.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE MW8 OCTAGON 9.87" M-LOK RAIL
8.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE MW8 OCTAGON 9.87" M-LOK RAIL
 
Alternative Views:
MSRP: $430.00
Our Price: $357.99
SALE PRICE: $307.99

Price with Selected Options: $307.99

Stock Status: In Stock


Product Code: MAS-083B1-MDOC-10

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
 
8.5" 300 BLACKOUT AR-15 BARRELED UPPER - MAS DEFENSE MW8 OCTAGON 9.87" 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 - 8.5" - 9.5" 300 Blackout Barrel. Click on the drop down box above to choose from our selection.

3. Handguard - MAS Defense MW8 Octagon 9.87" 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 - HYBRID GOLD TITANIUM NITRIDE (TiN) M16 BOLT CARRIER GROUP 5.56 & 300 BLACKOUT BCG - HYBRID NICKEL BORON FORGED CHARGING HANDLE AR-15 - STANDARD TACTICAL LATCH M16 BOLT CARRIER GROUP 5.56 & 300 BLACKOUT BCG - MELONITE NITRIDE
SALE PRICE: $99.99
SALE PRICE: $99.99
Our Price: $24.99
SALE PRICE: $79.99
M16 BOLT CARRIER GROUP 5.56 & 300 BLACKOUT BCG - HYBRID GOLD TITANIUM NITRIDE (TiN) M16 BOLT CARRIER GROUP 5.56 & 300 BLACKOUT BCG - NICKEL BORON AR-15 FORGED CHARGING HANDLE AR-15 - STANDARD TACTICAL LATCH M16 BOLT CARRIER GROUP 5.56 & 300 BLACKOUT MELONITE NITRIDE BCG

Average Rating: Average Rating: 4.5 of 5 4.5 of 5 Total Reviews: 3 CLICK HERE TO WRITE A REVIEW »

  0 of 0 people found the following review helpful:
 
5 of 5 Excellent Service/Product November 17, 2024
: from Woolwich, ME United States  
Excellent product! Super fast shipping. This is what I’ve come to expect from Mas Defense. Excellent company!

Was this review helpful to you?

  0 of 0 people found the following review helpful:
 
5 of 5 Great July 10, 2024
: Lawrence Burke from Anchorage, AK United States  
Quality tough upper

Was this review helpful to you?

  0 of 0 people found the following review helpful:
 
4 of 5 Barreled upper January 14, 2024
: R. Jenkins0 from Houston, TX United States  
Received the uppers I ordered quickly. They were well packaged and clean. MAS defense was great when I inquired about shipping these with no muzzle device (they are being replaced anyway). While they couldn't ship without them, they did offer to only hand tighten them, which they did. 4 stars because the rails are not the most "solid" set up I've seen, but for the price and intended use they should work just fine.

Was this review helpful to you?