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10.5" 300 BLACKOUT BARRELED UPPER - MAS NERO 12.62" M-LOK RAIL
10.5" 300 BLACKOUT BARRELED UPPER - MAS NERO 12.62" M-LOK RAIL


 
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MSRP: $400.00
Our Price: $284.99

Price with Selected Options: $284.99

Stock Status: In Stock

Product Code: MAS-103B1-MDNM-12

Upper Receiver Options:


Barrel Options:


Handguard Options:


Gas Block Options:


Gas Tube Options:


Muzzle Device Options:



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DESCRIPTION
 
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 AAC Blackout 1x8 4150 CrMoV Melonite Nitride Treated Steel

3. Handguard - MAS Defense "NERO" 12.62" Slimline M-LOK Free Floating Handguard - (ID 1.25")

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 - Slim (Pictured)

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.


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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 Perfect March 1, 2019
: Aaron from Maryland  
Ordered this upper with a few upgrades. Was built and shipped within two days. Came in exactly how I wanted. Will definitely be dealing with these guys more

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  0 of 0 people found the following review helpful:
 
5 of 5 Excellent upper November 29, 2018
: Kevin from North Dakota  
This is my first order from MAS and won’t be my last. The customer service was great from the get-go and the quality of the parts far exceed the price tag.

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  0 of 0 people found the following review helpful:
 
5 of 5 Great fit & finish September 28, 2018
: Shawn Lachance from GREEN COVE SPRINGS, FL United States  
I purchased this 300 BO upper for my pistol "build". This is my first upper & WILL NOT be my last from MAS Defense. I have sent 500 plus rds down range over the past couple of months and this upper works flawlessly! Very satisfied customer. Thanks MAS D!

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  0 of 0 people found the following review helpful:
 
5 of 5 Great overall experience April 15, 2018
: Justin C  
This is the second time ive ordered from MAS. Shipping was super fast, everything looks and functions great! I will be ordering again soon!

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  0 of 0 people found the following review helpful:
 
5 of 5 Best I've found April 15, 2018
: Christopher L  
I just bought this 10.5 300 blackout Nero railed upper as my second purchase from MAS. I research everything to death and HATE buyer's remourse. I have bought from 6-8 online vendors, but everytime I go to grab an AR it's my MAS Defense one, so when it was time to buy another one, this is the first place I looked. The new Nero rail is leeegggiitt. Very aggressive cuts, lightweight, but still solid, and the edges aren't sharp. MAS logos on the upper, rail, and barrel is a nice touch. They even know that 300 AAC in a 1/7 barrel flies best and don't cut corners with 1/8 or 1/9. Fit and finish are spot on, and the rail is tight and lines up perfectly. I'll be back as soon as the wife forgets about this one!

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