Weight gain is mostly food driven. Theres not much cosmetic weight gain on sarms, some ppl get a little bit of water on LGD, not me personally tho.
LGD or RAD 150 at 25-50mg per day, 6-8weeks. S23 is a option as well but S23 tends to have a higher risk of side effects. Similar in effects would be 25-50mg turanibol or 25mg anavar if you can get those.
RAD 150 + testosterone is very pleasant cycle.