View Full Version : Head Spacing Question

July 03, 2017, 12:15
I picked up a PSA Bolt and Carrier. It will close on a Foster 5.56 Nato
1.4636 Min. (go) gauge on two Colts and an Armalite, but won't on two
Del-Tons. One of the Del-Tons has a Spikes BCG that will close on this gauge. All of the rifles are 5.56. Can someone explain this to me? What could be out of spec?

July 03, 2017, 12:47
It sounds like the PSA bolt may be a bit big (but not necessarily out of spec). The Deltons may be chambered a bit tight (again, not necessarily out of spec). It doesn't happen often but is why they tell you to check the headspace when you are dealing with a new bolt or barrel on an AR. I suspect that if you slid the Colt BCG into the Delton the headspace would check OK. PSA might send you a new bolt if you call and tell them your problem.

July 03, 2017, 13:03
Thanks for the input. That's the only thing that makes sense.:bow: