Budget?
Want to run existing suppressor or new one? What is existing suppressor?
Without being knowledgeable on PA regs:
First option would be a “pistol” style build with stabilizer and all. (Similar to what was posted above)
If traditional rifle, I wouldn’t go longer than 16.25”. It’s not needed. I would personally lean towards something in 300blk for cost and ease of super/suppressed ammo (or .458socom, .450bush, etc) for that range. I’d have a fixed power 2.5x or 4x scope (with dope on super and sub loads taped inside scope cover). Super lightweight rig. And you can pop something subsonic waiting on mr. deer...I’m currently building a 458 socom around this theory. My 458socom AR suppressed shooting 500grns traveling 1000fps is a freight train within 100yds. (Not as quiet as a 22lr, 9mm, etc. but hearing safe for a few shots)