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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: $269.99
Savings: $330.00

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

Add A Magazine*:

Choose A Different Muzzle Device*:

Choose Keymod or M Lok Slots*:

Bolt Carrier Group:

Charging Handle:

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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.

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

*16" 458 SOCOM 4150 Hardened Chrome Moly Steel Barrel with 1x14 twist. Heavy Contour with 5/8x32 muzzle threads. Proper single feed ramp for 458 SOCOM cartridge. Parkerized treatment/finish.

*.936 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: 32 Write a review »

  0 of 0 people found the following review helpful:
4 of 5 Awesome Rifle Part March 23, 2020
Reviewer: Gary Duplissey  
Speedy delivery & great service. Only small compliant is that it wasn't tighten properly but no problem. Thanks

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  0 of 0 people found the following review helpful:
5 of 5 This 458 so come upper is excellent .the quality i March 23, 2020
Reviewer: Robert Sprague from Shady cove, OR United States  
I will be ordering more from ar15 parts and another 458 socom,

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  0 of 0 people found the following review helpful:
5 of 5 Awesome March 21, 2020
Reviewer: Ryan Wang  
Shipped fast and the upper looks great. I have yet to build it but I can't wait to build it.

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  0 of 0 people found the following review helpful:
5 of 5 Badazz! February 26, 2020
Reviewer: Brian J. from McKinney, TX  
I do custom uppers on the side and do hydrodip too.  Customer brought one of these uppers to me and had me do a camo dip on the furniture.  He also asked me to mount and sight in a scope.  That upper was crazy accurate with 325 FTX.  No label on the container so not sure where the rounds were from but long story short, I came to this company and bought one for my dang self since we hunt pigs in the panhandle.  Mine turned out to be just as accurate with Black butterfly ammo.   You won't regret it if you get one.

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  0 of 0 people found the following review helpful:
5 of 5 Finally one that works! January 12, 2020
Reviewer: Andrew from USA  
Got so frustrated with my bear creek upper and the constant failure to feed issues that I sold it.  Read through the description and it seemed like these guys had their act together so I rlled the dice.  Upper fits great and performed flawlessly.  Mags work great too.
Really happy I could choose cerakot options too.  Will definately buy here again.

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