Bolts Interchangeable?

[Tired Retired]

Let me just point out one point about "round bolts" for any newbies reading this....

Everything mentioned above is true about USGI produced bolts... HOWEVER, if a bolt was manufactured specifically for a COMMERCIALLY produced carbine (i.e. Universal), it will not fit and should not be used in a USGI carbine! That also goes for its parts (firing pin, extractor, etc).

Someone correct me if I am wrong but the two exceptions to the above rule are the ejector assembly and the extractor PLUNGER (only) made by Ivers Johnson....

Just trying to keep it safe....