The Streamlight forend wont work as the action bar and tube assembly is far smaller on the 410 model.
I have both the 12 and 410 models and there is some part interchangeability.
The scope rail mounting holes, front sight and safety are the same size for example. The stocks and forends do not interchange unfortunately.
I have a bunch of ammo test pattern I’ll get some pics up of later today.
I think my particular 410 model does pattern better then fatdogs