Quote Originally Posted by IceAxe View Post
It appears to me that the weak spot in both the SOCOM and the 450b is in the hogged out 556 bolt. I have found a modified ar10 bolt and extension that can be used in the ar15 platform. At least that's what it looks like to me. They call it a 6 BR offered by AR Performance.
I've had to remove the bottom two lugs on the ARPerf .478 dia bolts on a bunch 45 acp builds Ive done. They have a tendency to drag on cases without a shoulder.
Its no biggie the bolt is plenty strong even minus two lugs....and requires its own extension.
Ive also used MGI socom bolts on several socom builds pretty much without issue. They are considerably less costly than H's bolt/extension combo but are obviously weaker units.