5.56x45 is the Millitary equivilent of .223 remmington.
Just like 7.62x51 is the millitary equivilent of 308 winchester.
It has almost identical external dimensions but differs in the chamber...
Type: Posts; User: P38
5.56x45 is the Millitary equivilent of .223 remmington.
Just like 7.62x51 is the millitary equivilent of 308 winchester.
It has almost identical external dimensions but differs in the chamber...