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.
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.