I'll be ordering a Benelli M2 Tactical Comfortech soon and wish to get a magazine tube extension. I'm looking at Briley, Nordic Components, and Dave's Metal Works. They all have different ways of describing their capacity. Ideally, I would like longest extension while still being within the length of the barrel, i.e. I don't want it sticking beyond the barrel. I would think that would give me a capacity of 7 in the mag + 1 in the chamber. Though the brands have different descriptions they do seem to provide overall length of their extension. So, for the M2 Tactical Comfortech, what is the length from the end of the forearm to the end of the barrel?
What is the capacity of the magazine tube without any extension or what is the capacity of the mag extension that comes stock?
Thanks!