"The take-down AR from Cry Havoc https://cryhavoctac.com/."

My Army Buddy has bought one as a "kit" in hardcase that has 5.56 and 300 B.O. barrels and magazines set-up similar to the USAF pilot ejection seat kit. Interesting setup, I got to look it over but not to shoot it. Funny his G.F. is in USAF. Neither one knew that it's a civ copy of it.