M2speeedperf

Help please! Can I swap out the extended red magazine in the Benelli M2 Speed Performance? I ended up getting a Benelli M2 Speed Performance and its great when its put together, but taking it apart to fit in my safe and transporting in a packed car then putting it together for just a couple shots is really hard with that damn spring. Are there any parts i can buy to remove the extended tube magazine and just load one or two shells at a time? Would getting the Benelli magazine cap with swivel for the super black eagle II m2 12 gauge work? Product 410448 on midwayusa or manufacturer 61070? Do i also need a new spring too? Any guidance on this would be super appreciated