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+ 12% Off Select AR15 Parts Use Code: ARBUILD12

M4A1 SOCOM Block II 5.56 Stripped Upper 14.5" BBL
M4A1 SOCOM Block II 5.56 Stripped Upper 14.5" BBL
M4A1 SOCOM Block II 5.56 Stripped Upper 14.5" BBL
M4A1 SOCOM Block II 5.56 Stripped Upper 14.5" BBL
M4A1 SOCOM Block II 5.56 Stripped Upper 14.5" BBL
M4A1 SOCOM Block II 5.56 Stripped Upper 14.5" BBL
M4A1 SOCOM Block II 5.56 Stripped Uppr 14.5" BBL & B5 SOPMOD
M4A1 SOCOM Block II 5.56 Stripped Upper 14.5" BBL
M4A1 SOCOM Block II 5.56 Stripped Upper 14.5" BBL
M4A1 SOCOM Block II 5.56 Stripped Upper 14.5" BBL
M4A1 SOCOM Block II 5.56 Stripped Upper 14.5" BBL
M4A1 SOCOM Block II 5.56 Stripped Upper 14.5" BBL
M4A1 SOCOM Block II 5.56 Stripped Upper 14.5" BBL
M4A1 SOCOM Block II 5.56 Stripped Uppr 14.5" BBL & B5 SOPMOD
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DANIEL DEFENSE - M4A1 SOCOM BLOCK II 5.56 NATO STRIPPED UPPER RECEIVER

54 Reviews
Model Number
Brownells #
100040692, 100042985
MFR #
M4A1 SOCOM UPPER RECEIVER GROU, M4A1 STRPD UPPER & MIL-SPEC ST
UPC
$899.99 - $949.99
Coupon Code ARBUILD12
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Estimated delivery: Oct 7
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International purchase information

What is the DANIEL DEFENSE - M4A1 SOCOM BLOCK II 5.56 NATO STRIPPED UPPER RECEIVER?
The Daniel Defense M4A1 SOCOM Block II Upper Receiver has been designed for those looking to match the specs and performance on the M4A1 SOCOM Block II carbines used by troops during Operations Iraqi Freedom and Enduring Freedom. The Daniel Defense M4A1 SOCOM Block II Upper Receiver features a quad-rail handguard equipped with a Picatinny-compatible rail sections. The barrel is cold hammer forged from mil-spec chrome-moly vanadium steel and features a SOCOM, heavy profile, with a chrome-lined interior, matching military-style barrels with the same construction. The gas block is a Daniel Defense pinned low profile block, the same as the current generation provided to SOCOM.


  • Choose upper receiver with or without a B5 SOPMOD stock.
  • Made from 7075-T6 aluminum
  • Barrel length: 14.5 inches
  • Twist rate: 1:7
  • DOES NOT include BCG, charging handle or flash hider


The Daniel Defense M4A1 SOCOM Block II Upper Receiver features a flat dark earth anodized finish.


Specifications

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M4A1 SOCOM BLOCK II 5.56 NATO STRIPPED UPPER RECEIVER REVIEWS

4.6
54 Reviews
5 Stars
80%
4 Stars
9%
3 Stars
6%
2 Stars
6%
1 Stars
0%
Reviews Summary
Customers rave about the M4A1 SOCOM BLOCK II upper receiver, praising its construction quality, accuracy, and robust build. However, many are disappointed with the missing M203 hangar kit, and some highlight cosmetic blemishes. Despite concerns over the upper's weight and certain design elements, most users agree it offers excellent value, especially for a heavy-duty choice.
What Reviewers Are Saying
Product Quality
75%
Many reviewers highlight the outstanding quality of the upper receiver, noting its solid construction, durability, and accurate performance. The precision of the barrel and the overall design contribute to a favorable perception of its build and utility.
Missing Features
40%
A common point of frustration among reviewers is the absence of the M203 hangar kit, which many expected to be included. This lack has led to disappointment, particularly for those intending to use specific accessories.
Cosmetic Issues
35%
Some customers report minor blemishes or imperfections in the anodizing and finish of the upper receiver. While these do not affect functionality, they contributed to some dissatisfaction regarding the product’s presentation.
Weight Concerns
30%
A number of users mention the upper's weight, suggesting it may not be suitable for everyone. Despite this, many appreciate that the weight provides stability and mitigates recoil, especially with the heavy profile barrel.
Value for Money
65%
Overall, reviewers consider the price of the upper to be reasonable given its quality and features. Many assert that it represents a great value compared to alternative options on the market, especially for serious users.
Customer Service Experience
25%
Customers generally express satisfaction with the service provided by Brownell's, praising their friendly and responsive support, particularly in handling inquiries and confirming orders.
5
Great Upper and a great price!
With fast shipping!!
Would you recommend this? Yes, I would recommend to a friend
by WARREN H. on May 28, 2026
Verified Purchase
Was this review helpful? 0
5
Feel of quality
Tight and very ridged feeling. The hand guard is two pieces, the lower section being held in place by 4 screws in the side of the upper portion. I also bought a Riflespeed adjustable gas block, so took it apart first thing. The upper hand guard is held in place via six 4mm hex screws to a plate between the barrel nut and reciever. Fit and finish is nice and very tight.
Would you recommend this? Yes, I would recommend to a friend
by ROBERT T. on March 16, 2026
Verified Purchase
Was this review helpful? 3
5
Been wanting one
I’m pleased with the quality fast and informed shipping happy with my purchase
by GEORGE P. on December 10, 2025
Verified Purchase
Was this review helpful? 2
5
Very good
Very nice Daniel Defense upper
by ALLAN S. on October 04, 2025
Verified Purchase
Was this review helpful? 3
5
Great deal
Great price for a stripped upper
Would you recommend this? Yes, I would recommend to a friend
by Kenneth S. on August 16, 2025
Verified Purchase
Was this review helpful? 3
View All 54 Reviews
Customer Questions
0 Questions