Pretty stoked about starting this build. I still have parts ordered and they should be coming in over the course of the next week. I'll keep you updated as this build progresses. After much deliberation I went with the 18" barrel and being the OCD person that I am I ordered anything that I possibly could in keeping with the Mega brand. That would be the Mega Maten MKM (keymod extended rifle length) set, barrel, trigger and grip. All other parts will be ambi and on par with the quality of Mega as I build this out.