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8.5" 300 BLACKOUT BARRELED UPPER - SEEKINS MCSR V2 10" - KEYMOD
8.5" 300 BLACKOUT BARRELED UPPER - SEEKINS MCSR V2 10" - KEYMOD


 
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MSRP: $445.00
Our Price: $339.99

Price with Selected Options: $339.99

Stock Status: (Out of Stock)

Product Code: MAS-083B1-SPM2K-10

Upper Receiver Options:


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

3. Handguard - Seekins Precision MCSR V2 10" KeyMOD Rail

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: 4 CLICK HERE TO WRITE A REVIEW »

  0 of 0 people found the following review helpful:
 
5 of 5 8.5 300 Blk upper March 11, 2018
: Steven S  
It's nice to have options when buying a complete upper. I was able to get one exactly as I wanted thanks to MAS. I came here for the upper but left with the rest of what I needed and I'm glad I did. The quality and value of their products along with the very fast shipping makes MAS my new go to place! Thanks!

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  0 of 0 people found the following review helpful:
 
5 of 5 8.5 300 BLK Upper, great for your pistol build! December 18, 2017
: Randy De  
If you're looking for a great starting poing for your 300 Blackout Pistol build look no further, all the right components in the right place, enjoy!

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  0 of 0 people found the following review helpful:
 
5 of 5 8.5" 300 Blackout upper April 11, 2016
: Mark C  
Personal Goal for build - This upper is to be placed on a pistol lower, overall length is only 27" which is perfect in my mind for compact and discreet carry. Overall range will be 0 to 100 yardsmax.Shipping - Received in 5 business ds.Craftsmanship - High level of attention to detail in the build with all mating or clocked parts being precisely positioned into place.Ergonomics - The Seekins hand guard fit my needs and desires exactly, plenty of room for a suppressor in the future. Smooth enough for a comfortable feel, large enough for those wearing XL gloves and designed to blend in with the upper receiver seamlessly.Function - I have functioned tested with only 30 rounds so far to ensure proper bolt lock back on last round fired with an empty mag, no FTF or FTE. Unable to check for accuracy due to lacking a scope at this time but I am sure this setup wont disappoint. Enjoyable and soft shooting in pistol form using supersonic ammo (125 grain).

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  0 of 0 people found the following review helpful:
 
5 of 5 Outstanding Quality January 21, 2015
: Tim C  
Great customizing options on the product, Great price and fast shipping. I can't wait to get the rest of my parts in to get this build done. Thanks guys great job all around.

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