cabelas sells a 32" "metro barrel extention" i seen....maybe thats it?? it screws in your choke tube and only weighs like a pound or something like that....i forget what its for....i remember something about muzzle report was lower...and with special sub sonic loads it was WAY quieter.......dont know why youd use on for turkey hunting.....maybe better pattern....better velocity.....anyways...congrats on the turkey....