Maxus uses the Invector Plus. The A5 uses the Invector DS.
If you're going to use it for turkeys, there are lots of tubes out that will work well. Pattern a number of loads with the full choke that comes with the gun. It will give you benchmark for comparisons.
I've used the Browning 12 Gauge Invector-Plus Midas Grade extra full in my Maxus II and it patterns lead turkey loads very well:
https://www.browning.com/products/s...xtended-invector-plus-choke-tubes.html## I also have a couple of Carlsons chokes, for buckshot and for Winchester Longbeard XR rounds. This choke patterns Longbeard XR really well:
https://www.choketube.com/product-c...rkey-choke-tubes-browning-invector-plus/I've tried Kicks Gobblin' Thunder in it as well and they pattern well:
https://www.kicks-ind.com/products/invector-plus-gobblin-thunder-12g-choke-tube