My Greener is different than my BSAs.The BSA "insides" come out in an assembly, but my Grenner does not.They have different threads for the barrels also.BTY these are Cadet rifles,not commercial.I have seen BSA rifles with Greener barrels,so there seems to have been some cooperation. The quality seems to be the same. These little actions are amazing for their strength, and make nice rifles.Just one persons opinion.
Mike