I just finished a 20" hbar build last month, aside from a bipod, that is. I spent months researching what I wanted vs what was affordable vs best bang for buck. The amount of shit to sift through is staggering, but once you figure out what you want the rifle to do, it gets easier to narrow down. I cheaped the LPK with a standard CMMG kit, but a light trigger spring kit and some ruby stonework on the sear helped smooth it out nicely, little over 4 pound pull. Eventually it may get a Timney drop in, but just to get it cycling and sighted, the cheap kit works well enough for now. I went rifle length gas system, heavy buffer (H2), standard spring.