Yeah, I have spent the last year researching, just to learn that DPMS was the only one to make a quadrail for that upper. I understand why they made that tall upper, but I am building a couple different uppers with original DPMS parts (St. Cloud factory) and I want to do a slick side with the quad due to how beefy that receiver is. The worst part is when searching for that handguard, as soon as I type in "DPMS" it shows me every handguard that fits the DPMS platform, and not the brand. I was hoping somebody on here could point me in the right direction, or better yet, have one they would sell.