Best gas/piston for the money?

[Asiparks]

Which bren?

M2 11"

 

[E-Tool]

another vote for scar

 

[Tango_Foxtrot]

For the money? I'd say Sig 516 upper as well. I got one for under $500 before the price increase and it's been flawless. Accurate for a piston and a soft shooter. The BCG is interchangeable with the one from LWRC, so there are replacement BCG options.