Rated 5/5 based on 3 customer reviews
Item Number: TR-458UPPER
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 Number of Reviews: 3
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Detailed Description


  • Precision Machined from 7075-T6 Forging
  • Modified Specifically for the .458 SOCOM
  • Approximate Weight, 6.8 Oz,


About the .458 SOCOM

The 458 SOCOM cartridge offers the practical ballistics of the legendary .45-70 in a modern AR platform rifle and is capable of firing 250 to 600 grain .458 caliber bullets in a lightweight, controllable package. For hunting medium to large game, bullets in the 250 grain– 400 grain weight range possess devastating killing power. We have found that the .458 SOCOM offers peak downrange performance when firing the purpose built Barnes 300 grain TAC TX bullet in the 1750fps – 1800fps velocity range.

The SOCOM is also capable of launching 500- 600 grain bullets at subsonic velocities for suppressed or tactical use.
Building the .458 SOCOM takes only two caliber specific parts-a .458 specific bolt and barrel- Wilson Combat is further optimizing their .458 SOCOM rifles by adding an adjustable gas block, extra power action spring and straight gas tube as a standard reliability upgrade. Having the ability to easily adjust your gas volume allows the end user to fine tune their carbine's bolt velocity for a specific load’s power.
Minor machining has also been performed to the ejection port opening of the upper receiver to allow clearance for the larger cartridge.

The .458 SOCOM feeds flawlessly from many standard unmodified 5.56 AR magazines. Our extensive testing has found the Lancer L5 AWM magazine to be optimal for this round. The Lancer 20 round 5.56 magazine holds seven SOCOM rounds and the 30 round 5.56 magazine will hold nine. The .458 SOCOM achieves optimum ballistic performance in barrel lengths shorter than 16” so there is no need for longer, less portable barrels.
In our opinion the .458 SOCOM has several design and performance advantages over the.450 Bushmaster and the .500 Beowulf including improved functional reliability and the use of a standard AR magazine.

 Product ReviewsClick here to review this item
Excellent upper, tailor made for .458 SOCOM
I picked this up because I wasnt quite happy with the Tromix upper. Tromixs part was finished a bit rough mill marks visible through the anodizing, mild blemishing near the forward assist, an obnoxious caliber marking, and the anodizing compromised to mod it for .458. Wilson Combats upper, OTOH, is fully finished after enlarging the ejection port, with a crisp Cerro Forge keyhole mark, a properly sedate caliber engraving, and no obvious blemishes or mill marks. Be aware that this upper is COMPLETELY stripped; youll need to get a dust cover and forward assist in addition to the bare upper. I picked up Wilsons caliber-marked dust cover, so I can tell what caliber the upper is from either side.
Totally badass large bore receiver
I actually bought this for use with a .50 Beowulf build. Same mods to the ejection port. It does have .458 Socom stamped or engraved on the side, but its not real big. And unlike Tromixs, its not in giant white letters. And unlike Satern Machining, I ordered and it was on my doorstep in 3 days. Sunday included. I left Satern messages for 2 weeks with no callbacks.
Very nice
Very clean machining smooth finish on surface. A very nice upper. HAPPY HAPPY!!!!!!!

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