It kills me to do this but here it goes. This upper was built by Lane better known as Army Inf here on the site.
It consists of a Bushmaster receiver
RRA Enhanced Bolt carrier and bolt
Charging handle with big latch
18" 1/8 twist Douglas air gauged SS barrel
Threaded OPS INC 4 port brake
PRI flip up sight
PRI Carbon fiber FF tube
ARMS #38 super extended Mod rail
KAC side sling adapter
ARMS #40 rear flip up sight
100 round through this at the proper break in procedure.
Priced right at $1000.00 shipped