WTB Mr Blonde

Does anyone know what hop unit would fit into this model?

I've had a second hand DMR previously and I didn't get on with it but I think perhaps I didn't give it enough of a chance. I'm basing my expectations off of the performance of my usual 350fps AEGs. I just feel the left right deviation and distance don't match the specs of the gun. I've read a review that said the hop unit wasn't good enough for the power so I planned to upgrade that anyway when I bought it but I don't know what would fit it.

I have one myself and it's stock internals currently using 0.4's and performance is good but not as good as I'd like. Deviation left to right is generally unacceptable and range could be better. I'm not sure what hop unit could go in these as I feel that is the weak link. I also plan to upgrade the barrel and probably R-hop it.