Have any of our members built 458 socom ar style rifle.  If so please chime in and let us know how it runs.   Thanks.

Hi, I don’t know a lot of build details, however a family member of mine just built  a 458 Socom AR. My understanding is he purchased a complete 458 upper and mated it with a standard AR lower. I was present for the initial shooting of it and seemed to run well. 

He did say the ammo can be a bit hard to find and is expensive. So that may be a consideration. 

One word for parts Tromix.

I not only bought Tromix barrel bolt I had tromix assemble mine so it would feed cleanly.  The barrel and the feed ramps should be blended to ensure reliablity.  I have a 10.5" supressed SBR and may do a .375 Socom as well.  I've been loading with Starline brass.