458 Socom Build?… Anderson Makes a Stripped Upper for a Fresh Start

458 Socom

If you are in the market for building a .458 Socom rifle, there are not a lot of options out there for stripped upper receivers to do it yourself. You can purchase a good quality one from Aero Precision to the tune of $110 with a dust cover and forward assist. Aside from that, you are looking at getting a complete upper that can be found anywhere from $500 to $1,000+ depending on what you want.

For the DIY AR builders out there, Anderson Manufacturing has a new one available so you can start with a clean slate. No dust cover. No forward assist. Just the bare bones, stripped upper receiver at a very affordable MSRP of $80.

458 Socom

Anderson Manufacturing .458 Socom Stripped Upper Receiver – MSRP $80


This Anderson Manufacturing .458 Socom stripped upper receiver has feed ramps¬†and features a black anodized hard coat for durability. It is built from a 7075 T6 Aluminum Forging which most people would expect. You can simply build it up and drop into any standard AR-15 lower receiver. This upper receiver does not have Anderson’s RF85 treatment which essentially creates a finish that requires no lubrication. One other element to note is the¬†expanded ejection port opening. A nice nuance to ensure reliable ejection.

These are already available on Anderson Manufacturing’s website for that $80 price mark. This is definitely something worth considering if you are in the mood for a .458 Socom rifle.

The outdoors, fitness and anything related to firearms are my passions. I am a S&W Armorer, Glock Armorer, reloader and am coping with an addiction to classic S&W and Colt revolvers (by buying more revolvers). I’ve been a guest writer for Sierra Bullets and love long walks to the gun range.


  • Flounder

    So… why does 458 socom need a special upper reciever? Wasn’t it explicitly designed to be run in a standard one with only a new bolt and barrel needed?

    • Anonymoose

      Because the standard ejection port is kinda small for the bigass cases. It’s kind of like how people lower and flare their 1911 slides.

    • RSG

      More reliable ejection.

    • Christian Hedegaard-Schou

      In theory, it doesn’t need a special upper receiver but opening up the ejection port can increase ejection reliability and opening up the feed ramps into one larger wider feed ramp can increase feeding reliability.

  • Klaus Von Schmitto

    I’m thinking Klaus gets another hog hammer.

  • Christian Hedegaard-Schou

    Why does it have feed ramps? Plural? 458 Socom should have one wider larger single feed ramp.

    • Russ Kell

      That. Right there.

    • Gregory Markle

      While the person who likely duplicated the text for another upper and slightly edited it may not have known that, the upper that arrived the other day in my mailbox doesn’t have multiple ramps.

  • Seth Hill

    Ummm….. Aero has a stripped upper for $79.99, but they are out of stock (just like their assembled is).

  • John Zie

    Aero all the way

  • James Young

    Awesome, glad to finally see more .458 stuff on the market

  • uisconfruzed

    I wish Howa would chamber their MiniRifle Action in 458, 1/14″ twist in a 16″-18″ configuration. It’d be perfect for hunting sonic/subsonic and suppressed!
    The 45-70 cartridge is oversized for subs and light weight.