Most framers will handle a 31/2" Years ago I used one that shot a 4", heavy and fatiguing.

"That is very exciting"... exactly what do you have in mind doing with this high caliber nail gun?

Years ago, I worked in shop in run down district, at break time we'd drag hoses and guns out behind shop and shoot at rats. Somebody drove a 3" nail half way into one, everybody cheered, but it just made rat mad. It charged right at us. We made hasty retreat under covering fire.