Suggested Bucking (brand and model) for a WE Tech M9A3 GBB (ver 2, current) that's great in your experience

[CobraJockey]

Time for another replacement of the bucking on my WE Tech M9A3 GBB (gen 2 current model, Sem/Full Auto). This has a fixed non-adjustable hop-up. I've just used stock replacement OEM buckings, I'd like to try something else better and maybe lasts longer.

Anyone else with this model WE Tech M9A3 have some experience and advice on buckings? Mapleleaf, Cow-cow, others??

Thanks.

[Image below - Top one is my WE Tech M9A3 w/Gemtech "modified silencer" (baffles), bottom it my B&W "Poseidon Custom", both GBBP's]