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...