JohnM2

Thanks for the response. I guess my main question was do the Field model and Tactical model use two different magazine springs from the factory. You are saying yes I will need to order a M2 Tactical spring?

I have an M2 field model with 21” barrel that is 3+1 capacity. I wanted to buy and install the +2 factory extension that comes on the M2 Tactical models. If I get one, will it just replace the end cap of my Field model and I won’t have to change the spring?