Heckler and Koch MP5A3 9mm 4 Position 3rd Burst Lower A3 Stock Desirable Fleming Sear M-Lok Forend Surefire Flashlight GSL Phoenix Silencer  

Heckler & Koch MP5A3 9mm Fleming Sear installed into a 4pos / 3rd group All work was done by Ralph Smith @ RDTS French A3 Stock HuxWRX Rad 9 Silencer included  

Heckler and Koch MP5A3 9mm MLOK Forend Surefire Flashlight Qualified Sear 4 Position Pack / 3rd Burst Lower GSL Fatman Host is an SBR

Heckler and Koch MP5A3 9mm Fleming H Sear Registered as an SBR as well Host was done by Ralph at RDTS KAC Front Quad Rail with Aimpont mount and glass Comes with B&T 3 Lug Suppressor  

Heckler and Koch MP5 with JAC Sear 3 pos pictogram, Vortex Strikefire optic, A2 stock.  This is a registered sear by JAC.  You could move the trigger pack over to any numbers of hosts...