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8.5" 300 BLACKOUT BARRELED UPPER - YANKEE HILL 9.675" DIAMOND
8.5" 300 BLACKOUT BARRELED UPPER - YANKEE HILL 9.675" DIAMOND


 
MSRP: $390.00
Our Price: $329.99

Price with Selected Options: $329.99

Stock Status: (Out of Stock)

Product Code: MAS-083B1-YHDM-10

Upper Receiver Options:


Barrel Options:


Gas Block Options:


Gas Tube Options:


Muzzle Device Options:



Qty:  
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 - 8.5" 300 AAC Blackout 1x7 4150 CrMoV Melonite Nitride Treated Steel

3. Handguard - Yankee Hill Machine 9637 - 9.675" Diamond Series

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.

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Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 7 CLICK HERE TO WRITE A REVIEW »

  0 of 0 people found the following review helpful:
 
5 of 5 300 Blackout upper October 30, 2016
: Ed R  
Purchase and shipping times were outstanding, received upper in 4 ds of purchase. Could not be happier with the upper, fit and finish were as advertised. Would recommend this product to anyone wanting to build a quality pistol.

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  0 of 0 people found the following review helpful:
 
5 of 5 8.5" 300 BLACKOUT UPPER - YHM 9.675" DIAMOND September 12, 2016
: Travis C  
I looked around the world wide web for a long time for the perfect "complete 300 blackout pistol upper" and I can confidently conclude that the guys at MAS Defense are offering the best products on the market tod. Not only do they have stock of the items they sell, they do customized orders too. That is huge considering the current political climate. You can't find companies that offer this type of customer service and product availability on a consistent basis. Everybody else on the web is out of stock or on backorder and they don't tell you that until you are ready to pay them. On top of that, they are offering configurations that are out of date and they're not up on the latest and greatest.....NOT COOL!!!!You guys at MAS Defense are doing it the right way, keep doing what you're doing and I will keep coming back!!!

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  0 of 0 people found the following review helpful:
 
5 of 5 8.5" 300 BLACKOUT UPPER - YHM 9.675" DIAMOND September 6, 2016
: Travis C  
Could not be happier with this upper! Fit and finish is flawless. Stainless steel barrel is top quality!I have already recommended MAS Defense to friends and will be a repeat customer.Awesome job guys!Shipping was super fast, placed the order on a Sund and the package arrived on Wednesd.You can't go wrong with products from this company. Beyond satisfied!

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  0 of 0 people found the following review helpful:
 
5 of 5 AWESOME UPPER May 7, 2016
: Michael M  
Just as advertised, fits great, works even better. Customer service was friendly and knowledgeable and fast turn around from order to shipping. Strongly recommend this product. Best BAG (pun is intended) for your buck!

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  0 of 0 people found the following review helpful:
 
5 of 5 ar pistol upper November 17, 2014
: Guzman L  
Fair price, great quality. Overall 5 star experience. Order the upper, Frid afternoon and the following Frid I received it.I definitely happy with the product and will keep doing business with Mas Defense.G. From Maryland

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