Surplus M4A1 Block 2 uppers. Complete minus rear sight. Started as gov surplus 14.5" Colt M4A1 uppers (gov profile) and were built with Army surplus DD RIS II Rails, Surefire 4 Prong flash hider, CQD Sling mounts, USMC Surplus dark FDE KAC 99051 front sights. DD MK12 gas blocks. Colt C marked carriers and factory charging handle. These are basically not clones, as they are 100% milsurp components. Barrels gauged and headspaced, carriers have new gas rings/key and staking, everything was sonic cleaned and tested with 25 rounds. Both funcfion flawlessly. $1850 per OBO, and includes shipping if necessary. No trades. Thanks!