You can't beat weights. If I had to go to prison and learn how to do body-weight exercises, I would, but a barbell with the ability to set the weight in increm

You can't beat weights. If I had to go to prison and learn how to do body-weight exercises, I would, but a barbell with the ability to set the weight in increments of 5 lbs is exactly what you want to precisely overload your muscles at the exact rate your programming requires. Also, if body weight exercises were enough, why do elite athletes consistently use weights and machines?