I looked hard at all of the big name fishing/hunting kayaks and ended up with a NuCanoe Frontier 12. It's been a lot of fun to fish from but I haven't gotten much hunting out of it yet.
I took it on a deer trip last year but my dad showed up and I wasn't able to use it like I had planned. So that will have to wait for another time.
I did make a couple of duck outings with it last year but was really just feeling it out. The seats are rather large so I removed them for hunting and bought a low profile turkey chair from Sportsmen's. I also cut the floor out of my old ghg ground force layout blind so that I could bolt it to the rails.
NuCanoe states a 600lb weight limit and I've had no trouble with myself, my girlfriend, and our 80lb Labrador out paddling around. If the dog jumps out, and he will, I can grab his collar and hoist him back in without tipping.
For a gun holder, I cut sections of a wooden dowel and screwed in U-shaped tool hangers. On the other end, I found inserts at Ace hardware that are wood screw threaded on the outside and machine screw threaded on the inside. These bolt to my side rails. I also tied a section of Paracord about 8' long to a boat cleat and ran that through the sling swivel stud on my shotgun.
The boat has a lot of potential that I have yet to fully realize but it's been a fun project.