Big Bore AR-15: Tuning the 458 SOCOM Build (pt1)

So, here we are back at it again with the 458 SOCOM upper build. So far I have had to tweak and tune a magazine and action resistance to get the gun to start cycling. My conclusion from this testing has been that a H3 buffer and dedicated factory 458 SOCOM mags are the answer. Stay tuned for more updates on tge 458 and all other projects here on American Arms Channel!

God Bless and Keep Your Powder Dry