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16" 458 SOCOM Upper AR 15 Assembly Rifle Length Rail
16" 458 SOCOM Upper AR 15 Assembly Rifle Length Rail

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List Price: $599.99
Our Price: $429.99
Savings: $170.00

Availability:: Usually Ships in 24 to 72 Hours
Product Code: 16458CMU1X14MLMLR

Add A Magazine*:

Add a Picatinny Rail Section*:

Choose A Different Muzzle Device*:

Color of 12" M Lok Rail*:

Bolt Carrier Group:

Charging Handle:

Color of Upper Receiver ONLY:

Description Additional Info

16" 458 SOCOM Upper AR 15 Assembly Rifle Length Rail

*Milspec forged aluminum upper receiver with forward assist and dust cover assembly installed. Matte black hard coat anodized Mil 8625 Type 3 Class 2. One large single Feed Ramp for big bore cartridges. Forged from 7075 T6 aluminum. This receiver has been correctly modified around the ejection port to allow for clearance and proper ejection of the 458 SOCOM cartridge.

*AR15Part.com 12" Rifle Length Narrow Profile Free Float Rail. Very comfortable and very light weight. M Lok slots run the entire length of our rail at the 3, 6, and 9 o'clock postions. M Lok compatible picatinny rail sections NOT included but are available for purchase on our website if needed. M Lok compatible picatinny rail sections easily attach to our rails for adding accessories like bipods, flash lights, grips, lasers, etc.

*ER SHAW CUSTOM 16” 458 Socom 416R Stainless Steel Barrel with 1x14 twist and 5/8x32 Muzzle Threads. ER Shaw barrels are extremely accurate, high performance barrels with a long, exceptional reputation for quality.

*.875 low profile gas block.

*Carbine Gas Tube.

*Compact competition muzzle brake with crush washer.

*It is HIGHLY recommended to run this upper with a D&H Tactical 458 Socom Magazine for zero feed issues and our 458 bolt carrier group. It is a 458 Socom bolt carrier group with a genuine 458 Socom bolt assembly. It is highly recommended to use our brand bolt with 458 Socom uppers/barrels to eliminate feeding and extraction issues that are common to 458 Socom's that do not use this bolt. Our 458 Socom bolt assembly has MANY specific, unique and purposeful features about it that other brand 458 Socom bolts do not have. These features are absolutely critical for reliable, consistent performance in 458 Socom uppers. We have them available for purchase on our website.

*This upper assembly will fit all standard AR 15 lower receivers


This item IS NOT A FIREARM!!! It is only "Firearm Parts", so no FFL is needed and it can be shipped directly to you. You are responsible for knowing your state or local laws. We will not ship this item to areas where it is not legal to own..



    .458 SOCOM rifles and upper halves should always be loaded from a magazine. Do not load singly through the ejection port, a slam fire can occur upon bolt release.

    .458 SOCOM rifles and upper halves should only be fed from aluminum magazines. Polymer magazines can swell and rounds can shift creating opportunities for misfeeds, jams, and other issues that don’t occur with the aluminum mags.

Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 60 Write a review »

  0 of 0 people found the following review helpful:
3 of 5 Cycling issue October 16, 2020
Reviewer: Weston Barton from Acworth, GA United States  
Upper and barrel are top notch. The bcg is not so great tho. Very very tight and causing issues.

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  0 of 0 people found the following review helpful:
5 of 5 Very happy!! October 10, 2020
Reviewer: Joshua from Baskerville, VA United States  
Fast shipping! Very happy with my purchase. Fired very well. Using the 4 round magazine I ordered along with the upper and some old metal military mags I had it ran flawless. No feeding issues at all and very tight groupings right out of the box. Would highly reccommend giving this a go. You wont be disappointed.

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  0 of 0 people found the following review helpful:
5 of 5 458 socom October 4, 2020
Reviewer: Juan Rivera from Ingleside, TX United States  
Good looking upper and good shooting

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  0 of 0 people found the following review helpful:
5 of 5 Sweet September 12, 2020
Reviewer: jason from TOPEKA, KS United States  
Looks good feels good havent shot it yet arrived a little late but expected considering the times

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  1 of 1 people found the following review helpful:
4 of 5 Upper assembly September 3, 2020
Reviewer: Jim Lacey from Muncie, IN United States  
I like the way the assembly looks, it seems to be well built however at this time I have not finished assembling the entire rifle as I am waiting on more parts from other suppliers. I hope it performs as well as it looks, if so it will be well worth the price I paid for it. I ordered the part during the height og the China Virus Hoaxdemic so the shipping was slightly longer than usual, but it was still relatively fast compared to orders I have placed with most of my vendors. Based on that criteria I will give 4 stars, I would like to give a better rating but I still have not been able to see the assembly function as a complete rifle yet although from what I see I believe it will likely function as I expect it to.

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