Hello, I'm selling my cz Bren. This gun has essentially new internals and very few rounds down the barrel in general. 5.56mm. Adjustable piston system. Below is a list of included items. 

CZ 805 Bren

DH lower receiver. Original included also. 

for an extra $150 I have an ACR stock adapter, and ACR stock. To mount this you will need to complete the necessary paperwork, because this will turn it into an SBR. It was $340 new. 

i also have an Eotech Vudu on top. It can go with it for $600, includes the mount and original box.