I took my HK to the local hobby store here where a friend works to show him the stock where the batteries go. He is says it is a really tight fit and is looking into ways to create a battery pack for me that will fit and not get stuck.
Another friend who works there suggested a use a dremel tool on the stock to create some extra room for the battery.
Any suggestions/ideas other then buying a new stock? I may do that latter, just not right now.
Barrie, Ontario, Canada