With that said, here are a few examples of firearms that could potentially fall within your budget of $2800:

High-quality AR-15 rifles: These are popular semi-automatic rifles often used for home defense, sport shooting, and collecting. With the right accessories, you could easily spend around $2800.   

Used high-end handguns: Brands like Sig Sauer, Glock, or Heckler & Koch often produce high-quality handguns that can be found used for around $2800.

Bolt-action hunting rifles: For those interested in hunting or long-range shooting, a bolt-action rifle from a reputable manufacturer like Remington, Ruger, or Weatherby could be a good option.

Shotgun: Depending on the model and features, shotguns can range from a few hundred dollars to several thousand. A high-quality over-under or semi-automatic shotgun could fall within your budget.