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MK18 Stripped SOCOM Upper Receiver
MK18 Stripped SOCOM Upper Receiver
MK18 Stripped SOCOM Upper Receiver
MK18 Stripped SOCOM Upper Receiver
MK18 Stripped SOCOM Upper Receiver
MK18 Stripped SOCOM Upper Receiver
MK18 Stripped SOCOM Upper Receiver
MK18 Stripped SOCOM Upper Receiver
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DANIEL DEFENSE - MK18 Stripped SOCOM Upper Receiver

73 Reviews
MK18 Stripped SOCOM Upper Receiver
Brownells #
100018030
MFR #
BROWNELLS-MK18
UPC
$694.99 $899.99
Coupon Code
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Specifications
Cartridge:
5.56x45 NATO
Barrel Contour:
Medium
Barrel Length:
10.30
Color:
Black
Finish:
Matte
Make Model Fit:
AR-15.Universal
Material:
Aluminum
Hand:
Right
Twist:
1-7
Quantity:
1
Receiver Style:
Stripped
Restriction
Threaded Barrel Restriction:
Yes
Ship to all EXCEPT:
Australia, Poland
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What is the DANIEL DEFENSE - MK18 Stripped SOCOM Upper Receiver?

DANIEL DEFENSE MK18 STRIPPED SOCOM UPPER RECEIVER

Daniel Defense manufactures the highest quality complete AR-15 upper receivers on the market today! Every Daniel Defense upper is painstakingly hand assembled, quality assurance tested, and test fired to ensure that the highest quality product makes it to the hands of customers. The upper receiver is mil-spec with indexing marks and M4 feed ramps. CNC Machined of 7075-T6 aluminum, type III hard coat anodized, color is black. The barrel is chrome-moly vanadium steel, cold hammer forged in a 1:7 twist, 10.3" government profile, chrome lined. The handguard is the Daniel Defense RIS II MK18 model. It is CNC machined of 6061-T6 aluminum, and type III hard coat anodized, Flat Dark Earth. The gas system is made up of the set screw Torx low-profile gas block CNC machined from 4140 hardened steel with mil-spec heavy phosphate coating. It also features a carbine length direct impingement gas system.

Daniel Defense MK18 Videos

Take a closer look at the Brownells Exclusive MK18 Mod 1 and see the Daniel Defense MK18 on the range.

MK18 Mod 1 Brownells Exclusive

Daniel Defense MK18 On The Range

The gas system is made up of the set screw Torx low-profile gas block CNC machined from 4140 hardened steel with mil-spec heavy phosphate coating "and pinned to the barrel by danial defense.

These Upper Receiver Assemblies have been installed on a lower receiver & test fired. Please expect some signs of use from this testing conducted by Daniel Defense.


SPECS: Upper Receiver: CNC machined 7075-t6 Aluminum. Barrel: chrome moly vanadium steel, 1:7 twist, 10.3". Gas system: CNC machined 4140 hardened steel. Handguard: CNC machined 6061-T6 aluminum.


The handguard is Flat Dark Earth and the upper receiver is black.

See all of our AR15s and AR15 parts here.

Threaded Barrel Restriction: 
Threaded Barrels have restricted shipping to CA.

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MK18 STRIPPED SOCOM UPPER RECEIVER REVIEWS

4.5
73 Reviews
5 Stars
75%
4 Stars
12%
3 Stars
3%
2 Stars
4%
1 Stars
5%
Reviews Summary
The MK18 Stripped SOCOM Upper Receiver has garnered mostly positive reviews, with many praising its quality, craftsmanship, and performance. Customers highlight its fast shipping from Brownells and appreciate the option to select their own components. However, some users have reported minor imperfections and issues with the gas block and dust cover. Overall, it appears to be a reliable and well-regarded product for building personalized firearms.
What Reviewers Are Saying
Product Quality
75%
Many reviewers praise the quality and craftsmanship of the MK18 upper, noting its sturdy build and accuracy. It's commonly acknowledged as a reliable option for various applications, from personal builds to professional use. Overall satisfaction with material and functionality is high.
Shipping Experience
65%
A significant number of customers commend the fast shipping times from Brownells, often receiving their orders sooner than expected. This promptness enhances overall satisfaction with the purchase process.
Minor Imperfections
40%
While many users are thrilled with their purchase, several reviews point out minor imperfections such as nicks, dings, or inconsistencies in anodizing. Some feel these issues could be improved, especially for a product at this price point.
Customization Options
50%
Reviewers appreciate the flexibility to customize their build by selecting various components like bolt carrier groups and muzzle devices. This option is seen as a significant advantage for those looking to tailor their rifles to personal preferences.
Customer Service
55%
Many reviewers express satisfaction with Brownells' customer service, citing professionalism and efficiency in handling inquiries and order processes. Positive interactions contribute to an overall positive buying experience.
Overall Value
70%
Overall, buyers feel the MK18 upper offers great value for the price, especially when considering potential customization. It is seen as an affordable option compared to fully assembled models, making it appealing for both enthusiasts and professionals alike.
Customer Photos & Videos
5
Almost Genuine
Closest URG to a real MK18. The assembly of the upper receiver is outstanding. The only discrepancy is the plastic ejection port cover. The authentic cover is medal. Other than that it is good to go.
Would you recommend this? Yes, I would recommend to a friend
by CHRISTIAN Z. on August 28, 2026
Verified Purchase
Was this review helpful? 0
5
Mk18 upper is awesome!
Thanks to brownells and their sales I can actually own a mk18 I can’t wait to set it up for home defense/carbine courses!
Would you recommend this? Yes, I would recommend to a friend
by JEFF S. on July 11, 2026
Verified Purchase
Was this review helpful? 1
5
Mk18
Nice upper !
by Robert W. on June 12, 2026
Verified Purchase
Was this review helpful? 1
5
Mk18
It’s beautiful!!!
by Israel U. on June 04, 2026
Verified Purchase
Was this review helpful? 1
5
Worth every penny!
Got it on sale and don't regret it. Flawless out of the box. Got the stripped upper because I wanted to add a different muzzle device for a suppressor. Worked from day one.
Would you recommend this? Yes, I would recommend to a friend
by Frank E. on April 14, 2026
Verified Purchase
Was this review helpful? 3
View All 73 Reviews
Customer Questions
0 Questions