MK677 is super versatile and has benefits for cutting and bulking. MK677 is unique in that its not a SARM but instead it helps your body release more growth hormone, so it has benefits similar to HGH. Similar, not the same.
LGD4033 and Rad140 are your main bulking SARMS.
With Mk2866 coming in last with more healing and leaning out and less actual size that it adds.
Currently I have stacked LGD/MK2866/S4/MK677/GW501516.
And things are starting to get crazy! Crazy good that is, up 7-10lbs and down 5% body fat in about 6 weeks. =)