FN M16A4 for sale, less than 100 total rounds through it. 
This rifle features an AS Designs arc fire trigger paired with the CARL from Stuff and Things inc. This trigger provides a 3 position FRT with safe, semi, and 3 round FRT mode. 
Knights Armament M5 RAS rail, rail covers, and vertical grip. 

A Trijicon ACOG RCO 4x32 can be included for an additional $1,000 or best offer. 

No trades please, cash is king, open to offers.