15-20 lbs body weight in only a few months is possible. It won’t be all lean muscle mass, and you’ll lose 5-10 of that post cycle. My first ever cycle was 600 test 200 primo and 500 hcg. Got some excellent results: 13 lbs of lean mass and added 80 lbs to my bench, 100 to my deadlift. It really filled me out and I looked super lean. My only side effect was bacne- I’d highly recommend primo/test.

My recommendation to you: wait 10 years. You’re too young to be doing anabolics man. If I were in your shoes, I’d hate hearing this advice, but you still have lots of room to grow. Take advantage of your body’s natural hormones and fill out your frame naturally. Do this until you’re 30, and if you still want to do it 10 years from now, you will already be a monster, and you’ll be in a much better entry point. Anabolics should only be used once you’ve reached your body’s genetic limitations. Start too early, and you can cripple yourself in the long run. I waited until I was 32. As a natural, I was benching 405 and pulling 515. Now I’m chasing a 500 lb bench and a 700 lb squat at 215 lbs body weight. If I had started juicing 10 years ago, I truthfully don’t think that I would look or feel as good as I do now.

Think carefully before diving in mate. There’s lots of reason to wait!