Heckler and Koch MP5SD 9mm This is a 3 pin Registered Receiver(As close to factory gun as possible) 4 Position / 3rd Burst Lower Gun has been completely gone through and redone by RDTS A3 Stock

B&T HK MP5SD 9mm Suppressor Brand New Brugger & Thomet 9mm HKMP5SD Silencer Identical to the MP5SD suppressors that B&T AB provides to HK Germany for the HK MP5SD except they are made...

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 MP5SD A3 Stock 4 Position Lower with 3rd Burst Qualified Sear The host was built by Ralph Smith at RDTS on a original HK94, not a new imported gun

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...