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mpnv
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?

OLDMANPBK
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.

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