Yes, air rifles do come in .50 caliber and they are very powerful. The 500 Nitro Express air rifle fires a 350 grain hollow point at 910 fps and a 525 grain hollow point at 789 fps. That’s serious power!
The 500 Nitro Express is made by Extreme Big Bore Air Rifles
Watch this demonstration of the 500 Nitro Express Air Rifle. It’s a super custom rifle with lots of power. The great thing about air rifles is you can buy them with out an FFL. Order one online and it will be delivered to your door step. You can shoot them in your backyard too. Noise levels are very low.