I bought a .665 extended choke and installed in my escort.  The choke is seated in the barrel but there is a 1/16" gap between the end of barrel and start of the thicker choke extension. When I compare factory chokes to the aftermarket one, the factory one is shorter from threads to choke end.   Any concerns?  I didn't know if the 1/16" of the thinner portion that isn't supported by the barrel would be a weak spot.  I don't recall an extended choke having a gap like this one.  Likely the gun...