in response to the original general question re any disadvantage
with a sleeved gun,i will add my opinion.i would not buy a sleeved gun (regardless of price reduction or otherwise)simply because i do not wish to own a sleeved gun.my opinion is not based on any mechanical,safety,engineering or cost reason ,it is personal choice.
therefore,a disadvantage may be found on resale if anyone else shares my view,
cheers
mrwmartin

NA