02-25-2020, 06:50 PM
If who ever did the barrel drilled through the extension and into the barrel and the index pin goes through the extension and into the barrel there is no way the extension can either tighten or loosen unless the pin has sheared or the pin has came out of that drilled hole in the barrel.
In your case either the hole was never drilled into the barrel or not deep enough or the pin popped out of that hole.
They are assembled that way with a tight fitting pin to make it near impossible to take the extension off without drilling out the index pin.
This link may be of interest: https://rifleshooter.com/2014/05/buildin...m-a-blank/
In your case either the hole was never drilled into the barrel or not deep enough or the pin popped out of that hole.
They are assembled that way with a tight fitting pin to make it near impossible to take the extension off without drilling out the index pin.
This link may be of interest: https://rifleshooter.com/2014/05/buildin...m-a-blank/